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5. New minerals with a modular structure derived from hatrurite from the pyrometamorphic rocks. Part III. Gazeevite, BaCa6(SiO4)2(SO4)2O, from Israel and the Palestine Autonomy, South Levant, and from South Ossetia, Greater Caucasus

Author

Galuskin, E. V., primary, Gfeller, F., additional, Galuskina, I. O., additional, Armbruster, T., additional, Krzątała, A., additional, Vapnik, Y., additional, Kusz, J., additional, Dulski, M., additional, Gardocki, M., additional, Gurbanov, A. G., additional, and Dzierżanowski, P., additional

Published
2017
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6. Vapnikite Ca3UO6 – a new double-perovskite mineral from pyrometamorphic larnite rocks of the Jabel Harmun, Palestinian Autonomy, Israel

Author

Galuskina, I. O., Marzec, K. M., Armbruster, Thomas Michael, Galuskin, E. V., Kusz, J., and Dzierżanowski, P.

Subjects
550 Earth sciences & geology
Abstract

The new mineral species vapnikite, Ca3UO6, was found in larnite pyrometamorphic rocks of the Hatrurim Formation at Jabel Harmun in the Judean desert, Palestinian Autonomy, Israel. Vapnikite is an analogue of the synthetic ordered double-perovskite β-Ca3UO6 and is isostructural with the natural fluorperovskite – cryolite Na3AlF6. Vapnikite Ca3UO6 (P21/n,Z = 2, a = 5.739(1), b = 5.951(1), c = 8.312(1) Å, β = 90.4(1)°, V = 283.9(1) Å3) forms yellow-brown xenomorphic grains with a strong vitreous lustre. Small grains up to 20 – 30 m m in size are wedged between larnite, brownmillerite and ye'elimite. Vapnikite has irregular fracture, cleavage and parting were not observed. The calculated density is 5.322 g cm–3, the microhardness is VHN25 = 534 kg mm–2 (mean of seven measurements) corresponding to the hardness of ~5 on the Mohs scale. The crystal structure of vapnikite Ca3UO6 differs from that of its synthetic analogue β-Ca3UO6 by having a larger degree of Ca, U disorder. Vapnikite formed at the high-temperature retrograde stage of pyrometamorphism when larnite rocks were altered by fluids/melts of high alkalinity.

Published
2014
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8. New minerals with a modular structure derived from hatrurite from the pyrometamorphic Hatrurim Complex. Part II. Zadovite, BaCa6[(SiO4)(PO4)](PO4)2F and aradite, BaCa6[(SiO4)(VO4)](VO4)2F, from paralavas of the Hatrurim Basin, Negev Desert, Israel

Author

Galuskin, E. V., primary, Gfeller, F., additional, Galuskina, I. O., additional, Pakhomova, A., additional, Armbruster, T., additional, Vapnik, Y., additional, Włodyka, R., additional, Dzierżanowski, P., additional, and Murashko, M., additional

Published
2015
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16. Edgrewite Ca9(SiO4)4F2-hydroxyledgrewite Ca9(SiO4)4(OH)2, a new series of calcium humite-group minerals from altered xenoliths in the ignimbrite of Upper Chegem caldera, Northern Caucasus, Kabardino-Balkaria, Russia

Author

Galuskin, E. V., primary, Lazic, B., additional, Armbruster, T., additional, Galuskina, I. O., additional, Pertsev, N. N., additional, Gazeev, V. M., additional, Wlodyka, R., additional, Dulski, M., additional, Dzierzanowski, P., additional, Zadov, A. E., additional, and Dubrovinsky, L. S., additional

Published
2012
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20. Pavlovskyite Ca8(SiO4)2(Si3O10): A new mineral of altered silicate-carbonate xenoliths from the two Russian type localities, Birkhin massif, Baikal Lake area and Upper Chegem caldera, North Caucasus

Author

Galuskin, E. V., primary, Gfeller, F., additional, Savelyeva, V. B., additional, Armbruster, T., additional, Lazic, B., additional, Galuskina, I. O., additional, Tobbens, D. M., additional, Zadov, A. E., additional, Dzierzanowski, P., additional, Pertsev, N. N., additional, and Gazeev, V. M., additional

Published
2012
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24. Elbrusite-(Zr)--A new uranian garnet from the Upper Chegem caldera, Kabardino-Balkaria, Northern Caucasus, Russia

Author

Galuskina, I. O., primary, Galuskin, E. V., additional, Armbruster, T., additional, Lazic, B., additional, Kusz, J., additional, Dzierzanowski, P., additional, Gazeev, V. M., additional, Pertsev, N. N., additional, Prusik, K., additional, Zadov, A. E., additional, Winiarski, A., additional, Wrzalik, R., additional, and Gurbanov, A. G., additional

Published
2010
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27. Bitikleite-(SnAl) and bitikleite-(ZrFe): New garnets from xenoliths of the Upper Chegem volcanic structure, Kabardino-Balkaria, Northern Caucasus, Russia

Author

Galuskina, I. O., primary, Galuskin, E. V., additional, Armbruster, T., additional, Lazic, B., additional, Dzierzanowski, P., additional, Gazeev, V. M., additional, Prusik, K., additional, Pertsev, N. N., additional, Winiarski, A., additional, Zadov, A. E., additional, Wrzalik, R., additional, and Gurbanov, A. G., additional

Published
2010
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37. Irinarassite Ca3Sn2SiAl2O12 - new garnet from the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia.

Author

Galuskina, I. O., Galuskin, E. V., Prusik, K., Gazeev, V. M., Pertsev, N. N., and Dzierżanowski, P.

Subjects
*GARNET, *SILICATES, *CARBONATES, *RAMAN spectra, *PSEUDOMORPHS
Abstract

Irinarassite, Ca3Sn2SiAl2O12, a new mineral species of the garnet supergroup was discovered in metasomatically altered carbonate-silicate xenoliths in ignimbrites of the Upper Chegem Caldera, Northern Caucasus, Kabardino-Balkaria, Russia. It occurs as small zones and irregular spots in kimzeyite-kerimasite or rarely as single crystals not exceeding 10 μm in size, within complex pseudomorphs after zircon. Lakargiite, tazheranite, baddeleyite, kerimasite, kimzeyite, baghdadite and rarely magnesioferrite are associated with irinarassite in the pseudomorphs which are confined to larnite-cuspidine zones immediately adjoining the ignimbrite. Larnite, cuspidine, rondorfite, fluor- and hydroxylellestadite, fluorite and secondary minerals such as ettringite, hillebrandite and bultfonteinite are associated with irinarassite. Irinarassite is pale brown to yellow colour. The mineral is characterized by the absence of cleavage and by an irregular fracture. The calculated density is 4.3 g cm-1. The mineral is isotropic with a calculated refractive index of 1.9. The empirical crystal chemical formula of irinarassite from the holotype specimen is as follows (Ca2.965Fe0.0352+)∑3(Sn1.016Zr0.410Ti0.262Sb0.2375+Fe0.0352+U0.0176+Sc0.014Hf0.006Nb0.004)∑2.001(Al1.386Fe0.8043+Si0.446Ti0.3644+)∑3O12. Electron backscatter diffraction patterns of irinarassite are fitted to the garnet model with a = 12.50(3) Å with excellent MAD (mean angular deviation) = 0.16º. The Raman spectrum of irinarassite is analogous to those of kerimasite and other Zr-Sn-garnets of the schorlomite and bitikleite groups. [ABSTRACT FROM AUTHOR]

Published
2013
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38. New minerals with a modular structure derived from hatrurite from the pyrometamorphic Hatrurim Complex. Part I. Nabimusaite, KCa12(SiO4)4(SO4)2O2F, from larnite rocks of Jabel Harmun, Palestinian Autonomy, Israel

Author

Galuskin, E. V., Gfeller, F., Armbruster, T., Galuskina, I. O., Vapnik, Y., Murashko, M., Włodyka, R., and Dzierżanowski, P.

Subjects
*MINES & mineral resources, *MINERALOGY, *CRYSTAL structure, *CRYSTALLOGRAPHY, *MINERAL industries
Abstract

The new mineral nabimusaite, KCa12(SiO4)4(SO4)2O2F (R3̅m, a = 7.1905(4), c = 41.251(3) Å, V = 1847.1(2) Å3, Z = 3), has been discovered in larnite-ye'elimite nodules of pyrometamorphic rocks of the Hatrurim Complex. Nabimusaite is colourless, transparent with awhite streak, has a vitreous lustre and does not show luminescence. It is brittle, but shows pronounced parting and imperfect cleavage along (001). Nabimusaite is uniaxial (-), ω = 1.644(2), ɛ = 1.640(2) (589 nm), nonpleochroic, Mohs' hardness is ~5 and the calculated density is 3.119 g cm-3. The crystal structure has been solved and refined to R1 = 0.0416. Its artificial analogue is known. The nabimusaite structure may be derived from that of hatrurite, also known as the clinker phase 'alite' (C3S=Ca3SiO5), and is built up by an intercalation of three positively charged hatrurite-like modules of composition [Ca12(SiO4)4O2F]3+ with inserted modules of [K(SO4)2]3-. The hatrurite-like modules in nabimusaite are characterized by octahedrally coordinated anion sites and tetrahedrally coordinated cation sites. The structure is representative of the intercalated antiperovskite type. In contrast to its synthetic analogue, nabimusaite is P-bearing. The shortened bond T-O lengths for one tetrahedral site indicates P preference at the Si2 site, located at the border of the hatrurite-like modules. Significant variations of isomorphous substitutions in nabimusaite suggest the possibility of other isostructural minerals occurring in Nature. It also seems likely that nabimusaite could serve as a prototype for new advanced synthetic materials, given the discovery of two other new minerals in the Hatrurim Complex with related modular structures, placed in the nabimusaite group. These are zadovite and aradite, as described in a companion paper (Galuskin et al., 2015a). The mineral assemblage and paragenesis of nabimusaite suggests that nabimusaite formed as a result of the reaction of potassium-enriched, sulfate-bearing melt with larnite and ellestadite. This contradicts the isochemical model that pyrometamorphic rocks of the Hatrurim Complex formed relatively fast in a practically dry system. [ABSTRACT FROM AUTHOR]

Published
2015
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