naa a22 4500 510736238 CHVBK 20180411083011.0 cr unu---uuuuu 180411e20131201xx s 000 0 eng 10.1134/S1075701513070118 doi (NATIONALLICENCE)springer-10.1134/S1075701513070118 Kasatkinite, Ba2Ca8B5Si8O32(OH)3 · 6H2O6, a new mineral from the Bazhenovskoe deposit, the Central Urals, Russia [Elektronische Daten] [I. Pekov, N. Chukanov, Ya. Filinchuk, A. Zadov, N. Kononkova, S. Epanchintsev, P. Kaden, A. Kutzer, J. Göttlicher] A new mineral, kasatkinite, Ba2Ca8B5Si8O32(OH)3 · 6H2O, has been found at the Bazhenovskoe chrysotile asbestos deposit, the Central Urals, Russia in the cavities in rhodingite as a member of two assemblages: (l) on prehnite, with pectolite, calcite, and clinochlore; and (2) on grossular, with diopside and pectolite. Kasatkinite occurs as spherulites or bunches up to 3 mm in size, occasionally combined into crusts. Its individuals are acicular to hair-like, typically split, with a polygonal cross section, up to 0.5 mm (rarely, to 6 mm) in length and to 20 μm in thickness. They consist of numerous misoriented needle-shaped subindividuals up to several dozen μm long and no more than 1 μm thick. Kasatkinite individuals are transparent and colorless; its aggregates are snow white. The luster is vitreous or silky. No cleavage was observed; the fracture is uneven or splintery for aggregates. Individuals are flexible and elastic. The Mohs' hardness is 4-4.5. D meas = 2.95(5), D calc = 2.89 g/cm3. Kasatkinite is optically biaxial (+), α = 1.600(5), β = 1.603(2), γ = 1.626(2), 2V meas = 30(20)°, 2V calc = 40°. The IR spectrum is given. The 11B MAS NMR spectrum shows the presence of BO4 in the absence of BO3 groups. The chemical composition of kasatkinite (wt %; electron microprobe, H2O by gas chromatography) is as follows: 0.23 Na2O, 0.57 K2O, 28.94 CaO, 16.79 BaO, 11.57 B2O3, 0.28 Al2O3, 31.63 SiO2, 0.05 F, 9.05 H2O, −0.02 −O=F2; the total is 99.09. The empirical formula (calculated on the basis of O + F = 41 apfu, taking into account the TGA data) is: Na0.11K0.18Ba1.66Ca7.84B5.05Al0.08Si8.00O31.80(OH)3.06F0.04 · 6.10H2O. Kasatkinite is monoclinic, space group P21/c, P2/c, or Pc; the unit-cell dimensions are a = 5.745(3), b = 7.238(2), c = 20.79 (1) Å, β = 90.82(5)°, V = 864(1) Å3, Z = 1. The strongest reflections (d Å-I[hkl]) in the X-ray powder diffractions pattern are: 5.89-24[012], 3.48-2.1[006], 3.36-24[114]; 3.009-100[ $$12\bar 1$$ , 121, $$10\bar 6$$ ], 2.925-65[106, $$12\bar 2$$ , 122], 2.633-33[211, 124], 2.116-29[ $$13\bar 3$$ , 133, 028]. Kasatkinite is named in honor of A.V. Kasatkin (b. 1970), a Russian amateur mineralogist and mineral collector who has found this mineral. Type specimen is deposited in the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow. Pleiades Publishing, Ltd., 2013 Pekov I. Faculty of Geology, Moscow State University, 119991, Moscow, Russia aut Chukanov N. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia aut Filinchuk Ya Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Place Louis Pasteur, B-1348, Louvain-la-Neuve, Belgium aut Zadov A. NPP Teplokhim OOO, Dmitrovskoe sh. 100, Building 2, 127238, Moscow, Russia aut Kononkova N. Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, 117975, Moscow, Russia aut Epanchintsev S. ul. Fabrichnaya 6-2, 456574, Emanzhelinka, Chelyabinsk oblast, Russia aut Kaden P. Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany aut Kutzer A. Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany aut Göttlicher J. Karlsruhe Institute of Technology, Institute for Synchrotron Radiation, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany aut Geology of Ore Deposits Springer US; http://www.springer-ny.com 55/7(2013-12-01), 558-566 1075-7015 55:7<558 2013 55 11477 https://doi.org/10.1134/S1075701513070118 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1134/S1075701513070118 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pekov I. Faculty of Geology, Moscow State University, 119991, Moscow, Russia aut NATIONALLICENCE 700 1- Chukanov N. Institute of Problems of Chemical Physics, Russian Academy of Sciences, 142432, Chernogolovka, Moscow oblast, Russia aut NATIONALLICENCE 700 1- Filinchuk Ya Institute of Condensed Matter and Nanosciences, Université Catholique de Louvain, Place Louis Pasteur, B-1348, Louvain-la-Neuve, Belgium aut NATIONALLICENCE 700 1- Zadov A. NPP Teplokhim OOO, Dmitrovskoe sh. 100, Building 2, 127238, Moscow, Russia aut NATIONALLICENCE 700 1- Kononkova N. Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, ul. Kosygina 19, 117975, Moscow, Russia aut NATIONALLICENCE 700 1- Epanchintsev S. ul. Fabrichnaya 6-2, 456574, Emanzhelinka, Chelyabinsk oblast, Russia aut NATIONALLICENCE 700 1- Kaden P. Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany aut NATIONALLICENCE 700 1- Kutzer A. Karlsruhe Institute of Technology, Institute for Nuclear Waste Disposal, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany aut NATIONALLICENCE 700 1- Göttlicher J. Karlsruhe Institute of Technology, Institute for Synchrotron Radiation, Hermann-von-Helmholtz-Platz 1, D-76344, Eggenstein-Leopoldshafen, Germany aut NATIONALLICENCE 773 0- Geology of Ore Deposits Springer US; http://www.springer-ny.com 55/7(2013-12-01), 558-566 1075-7015 55:7<558 2013 55 11477 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer