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New ternary intermetallic compound Ce 2 Ru 2 Al was prepared in polycrystalline form, and its crystal structure was determined from both powder and single crystal X-ray diffraction data. The aluminide was found to crystallize with an orthorhombic structure (space group Cmce ) with the lattice parameters: a = 5.8914(4) Å, b = 9.9603(6) Å, and c = 6.9551(4) Å. The derived unit cell is an ordered variant of the binary La 2 Ni 3 type, where one of two Ni sites is fully occupied with Ru atoms, while another one accommodates Al atoms. The structure of Ce 2 Ru 2 Al can be regarded as a sequence of atomic layers normal to b -axis. The remarkable structural feature is a short distance between Ce and Ru atoms equal to 2.7816(4) Å. Magnetic measurements revealed that Ce ions in Ce 2 Ru 2 Al possess unstable 4 f shell that leads to intermediate valence behavior of the compound. Similar valence instability was observed before for other Ce intermetallics with short Ce–Ru bonds. [ABSTRACT FROM AUTHOR]

In order to extend our knowledge on effects of substitution of gallium by transition metal in solid solutions of gallides with the tetragonal BaAl 4 -type crystal structure we studied physical properties of polycrystalline samples of CePd x Ga 4− x ( x = 0.2−0.8). X-ray diffraction confirmed that the unit-cell volume of the system changes in a non-monotonic way with a maximum around x ∗ = 0.6. We performed magnetization, specific heat, electrical resistivity and thermoelectric power measurements in wide temperature and magnetic field ranges. Magnetic moments of Ce 3+ ions are very close to the value corresponding to the localized 4 f -state in the whole x -range covered, yet their variation with x coincides with that of lattice parameters, with a minimum close to x ∗ . The alloys order ferromagnetically at low temperatures, which causes distinct anomalies of the measured properties. The ordering temperature decreases with increasing the Pd content from 3.7 K for x = 0.2 down to 1.3 K for x = 0.8. The results suggest that no quantum critical transition can be approached within the solid solution existence range. [ABSTRACT FROM AUTHOR]

Abstract: The crystal structure of the novel compound Yb3Pt23Si11 has been determined from powder X-ray diffraction data to be isotypic with cubic Ce3Pt23Si11 (space group ; a =1.68052(5)nm). Magnetic susceptibility, electrical resistivity and heat capacity measurements, performed down to 0.4K, revealed that Yb3Pt23Si11 is a moderately enhanced paramagnetic compound with fairly unstable 4f electronic shell. [Copyright &y& Elsevier]

Abstract: Magnetic and related properties of RCu2Ge2 (R = Dy − Tm) intermetallics were investigated by means of magnetic susceptibility, electrical resistivity and specific heat measurements. The compounds were found to order antiferromagnetically at 6.2 K (DyCu2Ge2), 5.6 K (HoCu2Ge2), 3.0 K (ErCu2Ge2) and 3.9 K (TmCu2Ge2). Electrical transport and heat capacity data were analysed by means of appropriate models giving the Debye and Einstein temperatures estimation. By extracting purely magnetic contribution to the heat capacity the Schottky effect due to crystalline electric field (CF) was evidenced. The corresponding CF levels schemes were estimated, as well. Moreover, the magnetic entropy has been calculated for all investigated samples. [Copyright &y& Elsevier]

Abstract: Five novel cerium-based ternaries Ce2Rh3.1Si0.9, Ce4Rh12Si, Ce8Rh21.9Si3.1, CeRh1.82Si0.18 and CeRh3Si0.125 were studied by means of magnetic susceptibility and electrical resistivity measurements. All these phases were found to be Pauli paramagnets with metallic type of electrical conductivity. [Copyright &y& Elsevier]

Abstract: Novel ternary phases EuZn2−x Ga2+x , EuZn2−x Al2+x , Eu2Zn14.32Al2.68 and Eu3Zn17.68Al4.32 have been synthesized at 400°C, and characterized by means of X-ray single crystal diffraction at room temperature and magnetic measurements down to 1.72K. EuZn2−x Al2+x and EuZn2−x Ga2+x compounds crystallize with tetragonal unit cells of the BaAl4-type. Representatives of these series, namely EuZn1.25Al2.75 and EuZnGa3, order ferromagnetically below 25K and 14K, respectively, due to the presence of divalent Eu ions. The other two ternaries studied, i.e. Eu2Zn14.32Al2.68 and Eu3Zn17.68Al4.32, adopt the rhombohedral Th2Zn17- and the tetragonal Ce3Zn22-type structure, respectively. Both compounds form with Eu2+ ions and possibly order antiferromagnetically at the lowest temperatures investigated. [Copyright &y& Elsevier]

Abstract: The ternary intermetallic TmAgSi compound which crystallizes in the hexagonal ZrNiAl-type crystal structure. TmAgSi has been investigated by means of magnetic, heat capacity and neutron diffraction measurements. The experimental data revealed the presence of an antiferromagnetic ordering below T N = 3.3K with the magnetic moments lying within the basal plane. At 1.5K they are equal to 6.31(6). The determined magnetic structure is non-collinear and can be described by three different propagation vectors: , and . [ABSTRACT FROM AUTHOR]

Abstract: Novel RZn2Ga2 intermetallics with R=La, Ce, Pr, Nd, Sm have been synthesized and characterized with regards to their crystal structures and magnetic properties. The compounds form with a tetragonal structure of the BaAl4 type (space group I4/mmm). Except for LaZn2Ga2, they exhibit localised magnetism due to the presence of magnetic moments on the respective trivalent rare earth ions. The Pr-, Nd- and Sm-based compounds order antiferromagnetically at low temperatures with likely contribution of some ferromagnetic components. [ABSTRACT FROM AUTHOR]

Abstract: X-ray and neutron diffraction, magnetization, magnetic susceptibility and electrical resistivity measurements were performed on polycrystalline samples of PrNi2Ge2, PrRu2Ge2 and PrRh2Ge2. All the investigated compounds crystallize with a tetragonal structure of the ThCr2Si2-type. All of them exhibit metallic-like electrical conductivity and order magnetically at low temperatures, namely PrNi2Ge2 and PrRh2Ge2 are antiferromagnetic below T N = 23.5 and 45 K, respectively, while PrRu2Ge2 is a ferromagnet with T C = 14.8 K. The neutron diffraction data indicated a modulated antiferromagnetic structure in PrNi2Ge2 in the entire ordered region. For PrRh2Ge2 a collinear antiferromagnetic ordering was derived below T t = 30 K and a sine-modulated ordering above that temperature. The neutron diffraction corroborated a simple ferromagnetic structure in PrRu2Ge2. [ABSTRACT FROM AUTHOR]

Abstract: X-ray powder data for YbCu2Ge2, YbAg2Si2 and YbAg2Ge2 confirmed the atom order of the ThCr2Si2 type (ordered BaAl4 type) as reported earlier. YbCu2Ge2 is an intermediate valence system with the Yb ions valence close to +2 at low temperatures, whereas the other two compounds are weakly temperature-dependent paramagnets. All these ternaries show metallic character of their electrical conductivity. The structure of Yb(Cu1−x Zn x )2Si2 (x =0.65, 0.77) was found to correspond to the BaAl4 type, assuming a random distribution of Cu and Zn atoms over the positions 4d (0, 1/2, 1/4). The Si atoms were found in the sites 4e (0, 0, z). These two pseudoternary compounds are diamagnetic. A novel phase with the composition Yb(Ag0.18Si0.82)2 crystallizes in the ThSi2-type on the verge to a symmetry reduction towards orthorhombic GdSi2-type. This phase is a Pauli paramagnet and exhibits metallic behavior of the resistivity. [Copyright &y& Elsevier]

Correlations between magnetic properties and electronic structure of rare earth based intermetallics the ZrNiA1-type crystal structure have been analysed. The analysis has been supported by results of magnetometric, neutron diffraction and photoelectron spectroscopy measurements. It has been demonstrated that structure of the valence band and crystal electric field effects are the most important factors affecting the magnetic behaviour of the discussed compounds. [ABSTRACT FROM AUTHOR]

Abstract: The compounds U4Rh13Si9 and U4Ir13Si9 crystallize with the orthorhombic Er4Ir13Si9-type structure that contains three non-equivalent positions of uranium atoms. Their magnetic, electrical transport and thermal properties were studied down to liquid helium temperature in magnetic fields up to 9T. Both compounds have been found to order antiferromagnetically at low temperatures and to exhibit complex magnetic behavior in the ordered state. Some features characteristic of spin fluctuators (U4Rh13Si9) and Kondo lattices (U4Ir13Si9) indicate that the two ternaries studied are novel strongly correlated electron systems. [Copyright &y& Elsevier]

Abstract: The new intermetallic cerium compound CeRhPb was synthesized by arc melting and studied by means of X-ray diffraction and magnetic measurements. The crystal structure determined from the single-crystal X-ray data is of the ZrNiAl type (space group P6¯2m). The compound was found to be a Pauli paramagnet with 4f 0 ground state of the Ce atoms. The ab-initio band structure calculations performed without and with spin polarization confirmed the nonmagnetic character of the plumbide studied. [Copyright &y& Elsevier]

Abstract: The low-temperature physical properties of two intermetallics, Gd2CoGe6 and Tb2CoGe6, crystallizing with the orthorhombic Ce2CuGe6-type structure, have been studied by means of magnetization and electrical resistivity measurements. The magnetic behavior of these compounds involves the presence of magnetic moments on the rare earth and cobalt atoms sites. Both phases have been found to order antiferromagnetically below 20 and 22K, respectively. In each case, complex behavior of the magnetic susceptibility in the ordered state hints at some changes in the magnetic structure on decreasing the temperature. The two compounds exhibit metallic-type electrical conductivity. [Copyright &y& Elsevier]

Abstract: Alloys from the solid solution Ce1−x Th x Pt3Si (x =0.0, 0.02, 0.04, 0.08, 0.1, 0.2 and 1.0) were prepared by arc-melting. X-ray Rietveld powder analyses revealed that alloys in the compositional range 0≤ x ≤0.2 crystallize with the CePt3B-type with a random distribution of Ce and Th atoms in positions 1(b) (1/2, 1/2, z) of the noncentrosymmetric space group P4mm. Th-doping results in a rapid suppression of the superconductivity. The alloy with x =0.02 shows the onset of superconducting state at T c =400mK, while that with x =0.04 remains in normal metallic state at least down to 70mK. [Copyright &y& Elsevier]

Abstract: A new series of R2PdIn8 intermetallics, where R=Pr, Nd, and Sm, was prepared by arc-melting the constituents under argon atmosphere and studied by means of X-ray diffraction and magnetic measurements. The compounds crystallize with a tetragonal structure of the Ho2CoGa8 type (space group P4/mmm). At very low temperatures, they order antiferromagnetically, and the Nd-based indide presumably exhibits an additional magnetic phase transition in the ordered region. [ABSTRACT FROM AUTHOR]

Abstract: We report on the formation of a novel ternary compound Ce2PdIn8 that is isostructural with the heavy-fermion superconductors Ce2CoIn8 and Ce2RhIn8. Its magnetic, electrical transport and thermodynamic properties were studied on polycrystalline samples in wide ranges of temperature and magnetic field strength. The results revealed Ce2PdIn8 to be a paramagnetic Kondo lattice with a coherence temperature of about 12K. The ratio of the specific heat reaches at 350mK a strongly enhanced magnitude of about per Ce-atom, thus clearly indicating a heavy-fermion nature of this material. Moreover, a logarithmic divergence of vs. T, observed below 3K, which is accompanied by a linear temperature dependence of the electrical resistivity below 6K, hint at a non-Fermi liquid character of the electronic ground state in the new compound reported. [Copyright &y& Elsevier]

Abstract: We have studied four compounds, ThPd2Sn, UPd2Sn, NpPd2Sn and PuPd2Sn, crystallizing with an orthorhombic crystal structure within the Pnma space group. While UPd2Sn is a paramagnet, the ternaries NpPd2Sn and PuPd2Sn order antiferromagnetically at and 11K, respectively. All three compounds exhibit features characteristic of systems with strong electronic correlations, like large negative paramagnetic Curie temperatures, negative logarithmic slopes of the magnetic contribution to the resistivity and strongly enhanced low-temperature electronic specific heat. It seems probable that NpPd2Sn and PuPd2Sn are rare representatives of heavy-fermion systems amidst Np- and Pu-based intermetallics. [Copyright &y& Elsevier]

CeNiGe3, Ce2Ni3Ge5, Ce3NiGe2 and Ce3Ni2Ge7 compounds have been studied by means of DC and AC magnetic susceptibility, magnetization, resistivity and magnetoresistivity measurements. CeNiGe3 and Ce3Ni2Ge7 order antiferromagnetically below 5.5 and 7.5 K, respectively. For Ce2Ni3Ge5, two antiferromagnetic transitions at 5.1 and 4.4 K have been evidenced. Two subsequent phase transitions have also been found for Ce3NiGe2, but, in this case, antiferromagnetic spin arrangement below 6.2 K is replaced by a ferromagnetic one below 5.2 K. [Copyright &y& Elsevier]

Abstract: We report on magnetic susceptibility , electrical resistivity , magnetoresistance MR, thermoelectric power S, and specific heat of a new intermetallic compound . We found several features characteristic of non-Fermi liquid systems: at low temperatures , and . [Copyright &y& Elsevier]

Single crystals of a medium-heavy fermion antiferromagnet UCu5In have been investigated by means of magnetic susceptibility, magnetization, electrical resistivity, thermoelectric power and heat conductivity measurements, performed along the three principal crystallographic axes. Below TN=25 K, the magnetic, electrical and heat transport behavior exhibits a pronounced in-plane anisotropy, which is consistent with a unique non-collinear antiferromagnetic structure of the compound, found by neutron diffraction. In the paramagnetic region, all the transport properties have a semimetallic character with well-defined Kondo-like features. [Copyright &y& Elsevier]

Highlights: [•] CePd2Sn3, CePd2Sn4, and Ce3Pd6Sn10 – stannides of new structure types. [•] CePd2Sn3 presents an interstitial variant of the CeCrSb3 type structure. [•] Ce3Pd6Sn10 can be constructed of the CePd2Sn3 and CePd2Sn4 structures. [•] The three novel compounds have been found to be Curie Weiss paramagnets. [ABSTRACT FROM AUTHOR]

Abstract: The crystal structures of the UT2Zn20 (T=Fe, Co, Ru, Rh, and Ir) intermetallics have been refined from the single-crystal X-ray diffraction data. The compounds crystallize with a face-centered cubic structure of the Mg3Cr2Al18 type. [Copyright &y& Elsevier]

Abstract The crystal structure of the novel Al-rich intermetallic phase Ce 4 Pt 9 Al 13 was determined from single-crystal X-ray diffraction data and confirmed by powder X-ray diffraction. The compound crystallizes with its own structure type, which is a "site exchange" variant of the Ho 4 Ir 13 Ge 9 -type (Pearson symbol oP 52, space group Pmmn , No. 59, Z = 2, lattice parameters: a = 4.1826(1) Å, b = 11.4424(3) Å, c = 19.8475(5) Å, V = 949.88(7) Å3). The magnetic properties of Ce 4 Pt 9 Al 13 were determined in the temperature range 1.72–400 K. Down to the lowest temperatures studied, the compound shows a Curie-Weiss paramagnetic behavior with strong crystalline electric field contribution observed below about 200 K. The electrical conductivity in Ce 4 Pt 9 Al 13 has metallic character, and at low temperatures it is governed by an interplay of strong crystal field and Kondo interactions. Highlights • The novel ternary compound Ce 4 Pt 9 Al 13 crystallizes with its own structure type. • The Ce 4 Pt 9 Al 13 structure type is a "site exchange" variant of the Ho 4 Ir 13 Ge 9 -type. • Ce 4 Pt 9 Al 13 is characterized by the hexagonal-prismatic environment of the Ce atoms. • Ce 4 Pt 9 Al 13 exhibits a Curie-Weiss paramagnetic behavior due to Ce3+ valence state. • Physical properties are influenced by crystalline electric field and Kondo effects. [ABSTRACT FROM AUTHOR]

Nonmagnetic germanides La TE 2 Ge 2 with TE  = Fe, Co, Ni, Cu and Ru were studied by means of X-ray diffraction, magnetization and electrical resistivity measurements performed down to 2 K, supplemented by fully relativistic band structure and Fermi surface calculations. Results of the theoretical investigations of all the compounds are in line with the experimental findings, namely they show decreasing influence of 3d-electrons of the Fe, Co, Ni and Cu atoms on the electronic properties with increasing the atomic mass. In the case of LaFe 2 Ge 2 the electrical resistivity measurements strongly suggest presence of spin fluctuations, which make that system very similar to the unconventional superconductor YFe 2 Ge 2 . [ABSTRACT FROM AUTHOR]

The novel intermetallic indide Sc 5 Pd 2 In 4 was synthesized by arc-melting technique, and its crystal structure was determined using the single-crystal X-ray diffraction data ( R 1  = 0.0233, w R 2  = 0.0687). The compound was found to crystallize with an orthorhombic structure of the Lu 5 Ni 2 In 4 type (space group Pbam ), with the lattice parameters: a  = 17.4748(7), b  = 7.6674(3) and c  = 3.3815(2) Å. The magnetic behaviour in Sc 5 Pd 2 In 4 was studied in the temperature range 1.72–400 K. The compound was established to be a Pauli paramagnet with the molar magnetic susceptibility of about 3.4 × 10 −4 emu/mol. [ABSTRACT FROM AUTHOR]

The formation of a novel intermetallic compound with high content of cerium, Ce 11 Ru 3.83 In 9 , was established in a systematic investigation of the Ce-Ru-In ternary system. The crystal structure of this phase was revealed by a single-crystal X-ray diffraction experiment to be of the Nd 11 Pd 4 In 9 -type: orthorhombic space group Cmmm , the lattice parameters a = 14.9523(10) Å, b = 22.0133(15) Å, c = 3.8240(2) Å, Z = 2. By means of low-temperature magnetic susceptibility, magnetization, electrical resistivity and magnetoresistivity measurements, Ce 11 Ru 3.83 In 9 was found to exhibit localized magnetism due to trivalent Ce ions, with a ferromagnetic-like long-range ordering below 6.3 K. The likely nature of the magnetic structure is a ferrimagnetic arrangement of the cerium magnetic moments sited in the five independent sublattices in the crystallographic unit cell. The characteristic feature of Ce 11 Ru 3.83 In 9 , reported before also for the isostructural phases Ce 11 Ni 4 In 9 and Ce 11 Pd 4 In 9 , is strong crystalline electric field effect. The novel compound exhibits metallic conductivity with some contribution of spin-flip Kondo scattering. [ABSTRACT FROM AUTHOR]

Two novel ternary rare-earth aluminides, CePd 3 Al 2 and LaPd 3 Al 2 , were obtained by arc-melting the elements and subsequent annealing at 800 °C. Their crystal structures were determined from the single-crystal X-ray diffraction data. The compounds crystallize with their own structure type: space group Pnma , Z = 4, Pearson symbol oP 24, а = 7.491(2) Å, b = 4.3575(17) Å, ≿ = 13.123(4) Å for CePd 3 Al 2 and а = 7.474(7) Å, b = 4.3755(17) Å, ≿ = 13.323(9) Å for LaPd 3 Al 2 . The physical behavior of the Ce-based material was studied by means of magnetic, electrical resistivity and heat capacity measurements carried out down to 0.4 K. The compound was characterized as an antiferromagnetic heavy-fermion system with the Néel temperature T N = 1 K and the Kondo energy scale of about 2 K. [ABSTRACT FROM AUTHOR]

Polycrystalline samples of A x V 2 Al 20 ( A = Ce, Th, U, Np, Pu; 0.7 ≤ x ≤ 1.0) actinide intermetallics were synthesized using the arc-melting method. Crystal structure studies were performed by means of powder x-ray diffraction and the Rietveld refinement method. All studied compounds crystallize in the CeCr 2 Al 20 -type structure (space group Fd-3m, no. 227) with the actinide or Ce atom located in the oversized cage formed by Al atoms. Comparison of the crystallographic results with the reported data for LnV 2 Al 20 (Ln = lanthanides) counterparts reveals distinctly different behavior of the lanthanide- and actinide-bearing compounds. This difference is suggested to be caused by fairly localized character of the 4 f electrons, whereas itinerant character of the 5 f electrons is likely seen for U- and Np-containing phases. Magnetic susceptibility and specific heat measurements did not reveal any magnetic ordering in U 0.8 V 2 Al 20 , Np 0.8 V 2 Al 20 and Pu 0.8 V 2 Al 20 down to 2.5 K. A small anomaly in low-temperature specific heat of Ce 0.8 V 2 Al 20 , U 0.8 V 2 Al 20 , and Np 0.8 V 2 Al 20 is observed, likely arising from a low-energy Einstein mode. [ABSTRACT FROM AUTHOR]

Measurements are presented on the resistivity ρ ( T ), magnetoresistivity MR, dc susceptibility χ ( T ) and magnetization σ ( μ 0 H ), of the alloy series Ce 8 Pd 24 Al x with 0.1 ≤ x ≤ 2. Rietveld analysis of the X-ray diffraction (XRD) data indicates that Ce 8 Pd 24 Al crystallizes in the cubic structure with space group P m 3 ¯ m (No. 221). The crystal structure of this compound is composed of 8 cubes of CePd 3 in which the Al atoms occupy the centres of only certain octahedrons of Pd atoms. The CAILS - Pawley (cell and intensity least square) analysis of XRD data of all compositions show that the cubic structure of the parent compound CePd 3 is retained. The XRD analysis indicate a linear increase in the cubic unit cell volume up to x = 1, followed by a curvature for larger Al concentrations and a tendency towards saturation on approaching x = 2. Measurements in the Al-poor alloy in the temperature range 4.2–300 K indicate an evolution from the intermediate valence state of Ce 8 Pd 24 to Kondo behaviour with increased Al concentration. MR measurements on selected alloys are interpreted within the single-ion Bethe ansatz description and values of the Kondo temperature are calculated. χ ( T ) follows a Curie-Weiss behaviour with high-temperature effective moment values slightly reduced from the expected value of 2.54 μ B of the free Ce 3+ -ion. The paramagnetic Weiss constant temperature − θ p decreases rapidly with increasing Al content x , in line with the evolution from intermediate valence state to Kondo state. Low-temperature χ ( T ) data indicate antiferromagnetic ordering for the concentration range of 0.96 ≤ x ≤ 2. A Kondo and magnetic phase diagram for the Ce 8 Pd 24 Al x system is presented. [ABSTRACT FROM AUTHOR]

Highlights: [•] Demonstration of the full mutual solubility between CeAuIn and CeNiIn. [•] Determination of the magnetic and electrical properties of CeAu1−xNi x In alloys. [•] Determination of the electronic structure in CeAu1−xNi x In from the XPS spectra. [•] Finding the gradual Ni-content dependent cerium valence change in CeAu1−xNi x In. [Copyright &y& Elsevier]

Abstract: A new compound ErPt4In4 was synthesized by arc melting and its crystal structure was determined from the single crystal X-ray diffraction data: space group P63/mmc, a = 4.5321(9) Å, c = 19.807(13) Å, Pearson symbol hP18. The new structure type is composed of condensed via side edges Er-centered polyhedra [Pt8In6] and the corrugated slabs of In atoms alternating in the c-direction. A few isostructural compounds were found to form with Gd–Lu, and Y. The low-temperature physical properties of TbPt4In4, DyPt4In4 and YbPt4In4 were characterized by means of magnetic susceptibility and electrical resistivity measurements. All three compounds exhibit Curie–Weiss paramagnetism, due to the presence of well localized magnetic moments carried on trivalent rare-earth atoms, and metallic character of their electrical conductivity. The compounds TbPt4In4 and DyPt4In4 order magnetically below 8 and 5 K, respectively, whereas YbPt4In4 remains paramagnetic down to 1.7 K. [Copyright &y& Elsevier]

The compound NpNi2Sn has been studied by means of x-ray diffraction, heat capacity, magnetic and electrical transport measurements performed over a wide range of temperatures and applied magnetic fields. The results revealed Kondo-lattice behavior and antiferromagnetic ordering below the Néel temperature of 13 K. The compound has been characterized as a moderately enhanced heavy-fermion system, one of very few known amidst Np-based intermetallics. [ABSTRACT FROM AUTHOR]

Abstract: Magnetic susceptibility, magnetization, electrical resistivity and thermoelectric power of polycrystalline Ce2CoGe3, Ce3CoGe2, CeCo0.86Ge2, Ce5Co4Ge13, CeCoGe3, and Ce2Co3Ge5 were studied in wide temperature and magnetic field ranges. The results of magnetic properties and electrical resistivity measurements carried out for Ce3CoGe2, CeCo0.86Ge2, CeCoGe3 and Ce2Co3Ge5 corroborate the data reported in literature. Ce2CoGe3 and Ce5Co4Ge13 were found to be ferromagnetically ordered below 10 and 7 K, respectively. Moreover, the resistivity of Ce2CoGe3 shows Kondo-like behavior. The thermoelectric power exhibits in all six phases a large broad maximum, located between 50 and 150 K, most likely due to the presence of 4f electrons. [Copyright &y& Elsevier]

Abstract: The new ternary compounds U2Co3Ge and U6Co12Ge4 have been discovered during the investigation of the U–Co–Ge system. The Laves phase, U2Co3Ge crystallizes in the hexagonal Mg2Cu3Si type structure (P63/mmc) with the lattice parameters a =5.203(1)Å and c =7.687(1)Å. U6Co12Ge4 and its carbon-inserted derivative U6Co12Ge4C, crystallize, at room temperature in cubic unit cells, which derive from the Ca3Ag8 type structure ( space group) with the lattice parameter a =8.690(1)Å and a =8.740(1)Å, respectively. An interesting feature of their crystal structure is the formation of [U6] octahedra, which can be either empty or occupied by light elements such as O, N, or C. Measurements of the physical properties revealed that U2Co3Ge and U6Co12Ge4 are Pauli paramagnets with metallic character of their electrical conductivity. In turn, U6Co12Ge4C showed Curie–Weiss paramagnetism with an effective magnetic moment of 2.3(1)μ B per U atom. [Copyright &y& Elsevier]

Abstract: Two novel ternary intermediate phases, namely URuSi3−x (x=0.11) and U3Ru2Si7 were found in the Si-rich part of the U–Ru–Si phase diagram. Single crystal X-ray diffraction measurements, carried out at room temperature, indicated that URuSi3−x crystallizes in its own tetragonal type structure (space group P4/nmm, no. 129; unit cell parameters: a=12.108(1)Å and c=9.810(1)Å), being a derivative of the BaNiSn3-type structure. U3Ru2Si7 adopts in turn a disordered orthorhombic La3Co2Sn7-type structure (space group Cmmm, no. 65; unit cell parameters: a=4.063(1)Å, b=24.972(2)Å and c=4.072(1)Å). As revealed by magnetization, electrical resistivity and specific heat measurements, both compounds order magnetically at low temperatures. Namely URuSi3−x is a ferromagnet with T C=45K, and U3Ru2Si7 shows ferrimagnetic behavior below T C=29K. [ABSTRACT FROM AUTHOR]

Abstract: The new compounds U3Co12− xX 4 with X=Si, Ge were prepared by direct solidification of the corresponding liquid phase, followed by subsequent annealing at 1173K. Single crystal X-ray diffraction carried out at room temperature showed that they crystallize with the hexagonal space group P63 /mmc (no.194) and the unit-cell parameters a=8.130(5), c=8.537(5)Å and a=8.256(1), c=8.608(1)Å for the silicide and germanide, respectively. Their crystal structure derives from the EuMg5.2 structure type, and is closely related to the Sc3Ni11Si4 and Gd3Ru4− x Al12+ x types. For the present compounds, no substitution mechanisms have been observed, the partial occupancy of one Co site results from the presence of vacancies, only. The homogeneity ranges, evaluated by energy dispersive spectroscopy analysis, extend from x=0.0(2) to 0.3(2) and from x=0.0(2) to 1.0(2) for U3Co12− x Si4 and U3Co12− x Ge4, respectively. The electronic properties of both compounds were investigated by means of DC magnetic susceptibility and DC electrical resistivity measurements. The U3Co12− xX 4 compounds are both Pauli paramagnets with their electrical resistivity best described as poor metallic or dirty metallic behavior. [Copyright &y& Elsevier]

The crystal structure of a new intermetallic compound Ce6Pt11In14 has been determined from single crystal X-ray data and was refined by a full-matrix least-squares method down to R1=0.0497 for 1215 structure factors and 96 parameters. The unit cell is monoclinic, space group C2/m, Z=2 with the lattice parameters: a=22.729(5) Å, b=4.3960(10) Å, c=14.780(3) Å and β=118.35(3)°. It represents a new type of crystal structure of intermetallic compounds. [Copyright &y& Elsevier]

Intermetallic Ce2RuAl is prepared by arc melting of the elements followed by annealing at 823 K. [ABSTRACT FROM AUTHOR]