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Your search keyword '"BELAKOVSKIY, DMITRIY I."' showing total 249 results
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249 results on '"BELAKOVSKIY, DMITRIY I."'

2. Fluor-rossmanite, □(Al2Li)Al6(Si6O18)(BO3)3(OH)3F, a new tourmaline supergroup mineral from Malkhan pegmatite field, Western Siberia, Russia.

Author

Kasatkin, Anatoly V., primary, Nestola, Fabrizio, additional, Day, Maxwell C., additional, Gorelova, Liudmila A., additional, Škoda, Radek, additional, Vereshchagin, Oleg S., additional, Agakhanov, Atali A., additional, Belakovskiy, Dmitriy I., additional, Pamato, Martha G., additional, Cempírek, Jan, additional, and Anosov, Mikhail Yu., additional

Published
2024
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11. The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part IV. Alexkuznetsovite-(La), La2Mn(CO3)(Si2O7), alexkuznetsovite-(Ce), Ce2Mn(CO3)(Si2O7) and biraite-(La), La2Fe2+(CO3)(Si2O7), three new isostructural minerals and a definition of the biraite group

Author

Kasatkin, Anatoly V., primary, Zubkova, Natalia V., additional, Pekov, Igor V., additional, Chukanov, Nikita V., additional, Škoda, Radek, additional, Agakhanov, Atali A., additional, Belakovskiy, Dmitriy I., additional, Britvin, Sergey N., additional, and Yu. Pushcharovsky, Dmitry, additional

Published
2021
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13. The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part II. Radekškodaite-(La), (CaLa 5 )(Al 4 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 5 O(OH) 3 and radekškodaite-(Ce), (CaCe 5 )(Al 4 Fe 2+ )[Si 2 O 7 ][SiO 4 ] 5 O(OH) 3 , two new minerals with a novel structure-type belonging to the epidote–törnebohmite polysomatic series

Author

Kasatkin, Anatoly V., Zubkova, Natalia V., Pekov, Igor V., Chukanov, Nikita V., Ksenofontov, Dmitriy A., Agakhanov, Atali A., Belakovskiy, Dmitriy I., Polekhovsky, Yury S., Kuznetsov, Aleksey M., Britvin, Sergey N., Pushcharovsky, Dmitry Yu., and Nestola, Fabrizio

Published
2020

16. The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part III. Percleveite-(La), La2Si2O7, a new REE disilicate mineral

Author

Kasatkin, Anatoly V., primary, Zubkova, Natalia V., additional, Pekov, Igor V., additional, Chukanov, Nikita V., additional, Škoda, Radek, additional, Agakhanov, Atali A., additional, Belakovskiy, Dmitriy I., additional, Ksenofontov, Dmitriy A., additional, Plášil, Jakub, additional, Kuznetsov, Aleksey M., additional, Britvin, Sergey N., additional, and Pushcharovsky, Dmitry Yu., additional

Published
2020
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18. The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part II. Radekškodaite-(La), (CaLa5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3 and radekškodaite-(Ce), (CaCe5)(Al4Fe2+)[Si2O7][SiO4]5O(OH)3, two new minerals with a novel structure-type belonging to the epidote–törnebohmite polysomatic series

Author

Kasatkin, Anatoly V., primary, Zubkova, Natalia V., additional, Pekov, Igor V., additional, Chukanov, Nikita V., additional, Ksenofontov, Dmitriy A., additional, Agakhanov, Atali A., additional, Belakovskiy, Dmitriy I., additional, Polekhovsky, Yury S., additional, Kuznetsov, Aleksey M., additional, Britvin, Sergey N., additional, Pushcharovsky, Dmitry Yu., additional, and Nestola, Fabrizio, additional

Published
2020
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20. The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa3)(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 and perbøeite-(La), (CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2

Author

Kasatkin, Anatoly V., primary, Zubkova, Natalia V., additional, Pekov, Igor V., additional, Chukanov, Nikita V., additional, Škoda, Radek, additional, Polekhovsky, Yury S., additional, Agakhanov, Atali A., additional, Belakovskiy, Dmitriy I., additional, Kuznetsov, Aleksey M., additional, Britvin, Sergey N., additional, and Pushcharovsky, Dmitry Yu., additional

Published
2020
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22. The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part IV. Alexkuznetsovite-(La), La2Mn(CO3)(Si2O7), alexkuznetsovite-(Ce), Ce2Mn(CO3)(Si2O7) and biraite-(La), La2Fe2+(CO3)(Si2O7), three new isostructural minerals and a definition of the biraite group

Author

Kasatkin, Anatoly V., Zubkova, Natalia V., Pekov, Igor V., Chukanov, Nikita V., Škoda, Radek, Agakhanov, Atali A., Belakovskiy, Dmitriy I., Britvin, Sergey N., and Yu. Pushcharovsky, Dmitry

Published
2021
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26. The mineralogy of the historical Mochalin Log REE deposit, South Urals, Russia. Part I. New gatelite-group minerals ferriperbøeite-(La), (CaLa3)(Fe3+Al2Fe2+)[Si2O7][SiO4]3O(OH)2 and perbøeite-(La), (CaLa3)(Al3Fe2+)[Si2O7][SiO4]3O(OH)2

Author

Kasatkin, Anatoly V., Zubkova, Natalia V., Pekov, Igor V., Chukanov, Nikita V., Škoda, Radek, Polekhovsky, Yury S., Agakhanov, Atali A., Belakovskiy, Dmitriy I., Kuznetsov, Aleksey M., Britvin, Sergey N., and Pushcharovsky, Dmitry Yu.

Published
2020
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29. New Mineral Names*,†

Author

Gagné, Olivier C., primary, Belakovskiy, Dmitriy I., additional, Cámara, Fernando, additional, Uvarova, Yulia, additional, and Cabri, Louis J., additional

Published
2018
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31. Parisite-(La), ideally CaLa2(CO3)3F2, a new mineral from Novo Horizonte, Bahia, Brazil

Author

Menezes Filho, Luiz A. D., primary, Chaves, Mario L. S. C., additional, Chukanov, Nikita V., additional, Atencio, Daniel, additional, Scholz, Ricardo, additional, Pekov, Igor, additional, da Costa, Geraldo Magela, additional, Morrison, Shaunna M., additional, Andrade, Marcelo B., additional, Freitas, Erico T. F., additional, Downs, Robert T., additional, and Belakovskiy, Dmitriy I., additional

Published
2018
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33. New Mineral Names*,†

Author

Cámara, Fernando, primary, Belakovskiy, Dmitriy I., additional, Uvarova, Yulia, additional, and Gagne, Olivier C., additional

Published
2017
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34. New Mineral Names

Author

Belakovskiy, Dmitriy I., primary, Cámara, Fernando, additional, and Gagné, Olivier C., additional

Published
2017
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42. The new mineral fluorbarytolamprophyllite, (Ba,Sr,K)2[(Na,Fe2+)3TiF2][Ti2(Si2O7)2O2] and chemical evolution of lamprophyllite-group minerals in agpaitic syenites of the Kola Peninsula

Author

Filina, Maria I., Aksenov, Sergey M., Sorokhtina, Natalia V., Chukanov, Nikita V., Kononkova, Natalia N., Belakovskiy, Dmitriy I., Britvin, Sergey N., Kogarko, Lia N., Chervonnyi, Alexandr D., and Rastsvetaeva, Ramiza K.

Subjects
ALKALINE earth metals, SYENITE, MINERALS, ORTHOCLASE, X-ray powder diffraction, ELECTRON probe microanalysis
Abstract

Unusual agpaitic syenites containing up to 25 vol.% lamprophyllite-group minerals (lamprophyllite, fluorlamprophyllite, barytolamprophyllite, and the new mineral species fluorbarytolamprophyllite, IMA 2016–089) have been discovered in the Niva intrusion and Mokhnatye Roga alkaline dyke belonging to the Kola Alkaline Province, northwestern Russia. The other main components of the rocks are potassium feldspar, Ti-rich aegirine-augite, aenigmatite, alkaline amphiboles, astrophyllite, natrolite, and ferripyrophyllite. Three generations of lamprophyllite-group minerals can be distinguished based on their morphological features. The new mineral fluorbarytolamprophyllite is the F-dominant analogue of barytolamprophyllite and the Ba-dominant analogue of fluorlamprophyllite. It represents the early generation of lamprophyllite-group minerals (LGM) and forms brown prismatic crystals, their radial aggregates and marginal zones of fluorlamprophyllite crystals. The lustre of the new mineral is vitreous to pearly. Mohs hardness is 2.5. Dcalc is 3.662 g/cm3. The mineral is optically biaxial (+), α = 1.738(3), β = 1.745(4), γ = 1.777(4) (589 nm), 2 V (meas.) = 55(5)°, 2 V (calc.) = 51°. The chemical composition (electron microprobe, water determined by TGA, wt.%) is: Na2O 10.01, K2O 2.65, MgO 0.43, CaO 0.64, SrO 5.59, BaO 16.23, MnO 0.50, FeO 4.44, Al2O3 0.08, TiO2 27.31, ZrO2 0.22, Nb2O5 0.91, Ta2O5 0.15, SiO2 29.35, F 2.41, H2O 0.26, total 101.18. The empirical formula based on 18 anions is (Ba0.865Sr0.44K0.46Na0.26)Σ2.025(Na2.38Ca0.09Fe0.47Mn0.06)Σ3.00(Ti2.79Mg0.09Fe0.035Nb0.06Zr0.015Ta0.01)Σ3.00(Si3.99Al0.01)Σ4.00 O16[F1.04O0.72(OH)0.24]Σ2.00. The IR spectrum is given. The strongest lines of the powder X-ray diffraction pattern are [d, Å (I,%) (hkl)]: 9.692 (40) (200), 3.726 (59) (−311), 3.414 (67) (311), 3.230 (96) (300), 3.013 (53) (−5–11), 2.780 (100) (221), 2.662 (52) (002). The crystal structure has been solved and refined to R1 = 5.07 based on 2897 independent reflections with I > 2σ(I). Fluorbarytolamprophyllite is monoclinic, space group C2/m. The unit-cell parameters refined from the powder data are: a = 19.520(5), b = 7.0995(17), c = 5.3896(20) Å, β = 96.657(23)°; V = 741.86(24) Å3, Z = 2. At Niva and Mokhnatye Roga, most of the LGM were formed during magmatic stage of syenite crystallization from alkaline melt enriched in Na, K, Ba, Fe, Ti and F. Compositional variation of the examined LGM and their textural relations show changes in the Sr/Ba ratio in the parental melt and increasing activity of F and Ba in derivatives fluids as the main factors driving this variation. [ABSTRACT FROM AUTHOR]

Published
2019
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43. Kruijenite, Ca4Al4(SO4)F2(OH)16·2H2O, a new mineral with microporous structure from the Eifel paleovolcanic region, Germany.

Author

Chukanov, Nikita V., Zubkova, Natalia V., Blass, Günter, Pekov, Igor V., Varlamov, Dmitry A., Belakovskiy, Dmitriy I., Ksenofontov, Dmitry A., Britvin, Sergey N., and Pushcharovsky, Dmitry Yu.

Subjects
MINERALS
Abstract

The new mineral kruijenite, ideally Ca4Al4(SO4)F2(OH)16·2H2O, was found in a calcic xenolith from tephra of the Feuerberg paleovolcano situated near Daun, Eifel paleovolcanic region, Rhineland-Palatinate, Germany. It is associated with fluorite, calcite, aragonite, cuspidine, magnesioferrite, hematite, sharyginite, harmunite, and an insufficiently investigated hydrous Ca-Mg-Al silicate. Kruijenite occurs as pale greenish-yellow to colourless long prismatic tetragonal crystals up to 0.1 mm × 1 mm in cavities typically combined in radiating or random aggregates. The mineral is brittle, with Mohs' hardness of 3; Dcalc is 2.573 g/cm3. The IR spectrum is given. Kruijenite is optically uniaxial (−), ω = 1.576(3), ε = 1.561(3). The chemical composition (wavelength dispersive spectrometer Oxford INCA Wave 700 EPMA analyser, H2O calculated from structural data) is: CaO 32.38 wt%, Al2O3 27.75 wt%, Cr2O3 1.45 wt%, SO3 8.09 wt%, F 5.84 wt%, H2O 25.64 wt%, -O=F -2.46 wt%, total 98.69 wt%. The empirical formula is Ca4.00(Al3.77Cr0.13)Σ3.90(SO4)0.70F2.13(OH)16.17·1.79H2O (Z = 2). Kruijenite is tetragonal, space group P4/ncc, a = 12.9299(4) Å, c = 5.2791(3) Å, V = 882.57(6) Å3, Z = 2. The crystal structure was solved and refined to R = 0.121. Kruijenite represents a novel structure type. Its structure is based on the microporous pseudo-framework built by Al(OH)6 octahedra and CaF2(OH)6 polyhedra. The strongest reflections of the powder X-ray diffraction pattern [d (I) (hkl)] are: 9.12 Å (77%) (110), 4.565 Å (100%) (220), 4.084 Å (50%) (310), 2.964 Å (74%) (321), 2.694 Å (27%) (411), 2.321 Å (24%) (431), 2.284 Å (29%) (511), 2.217 Å (22%) (321, 530), 1.971 Å (40%) (611). The mineral is named in honor of the Dutch collector of Eifel minerals Fred Kruijen (born in 1956). [ABSTRACT FROM AUTHOR]

Published
2019
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50. New Mineral Names

Author

Gagne, Olivier C., primary, Belakovskiy, Dmitriy I., additional, and Cámara, Fernando, additional

Published
2016
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