Tatarinovite Са 3 Al(SO 4 )[В(ОH) 4 ](ОH) 6  · 12H 2 O, a new ettringite-group mineral from the Bazhenovskoe deposit, Middle Urals, Russia, and its crystal structure

N. V. Chukanov; A. B. Loskutov; Ya. V. Bychkova; D. A. Varlamov; I. V. Pekov; L. A. Pautov; S. N. Britvin; N. V. Zubkova; A. V. Kasatkin; E. A. Novgorodova

doi:10.1134/S1075701516080080

Tatarinovite Са₃Al(SO₄)[В(ОH)₄](ОH)₆ · 12H₂O, a new ettringite-group mineral from the Bazhenovskoe deposit, Middle Urals, Russia, and its crystal structure

Authors: Chukanov N.V.¹^,2, Loskutov A.B.³, Bychkova Y.V.⁴, Varlamov D.A.⁵, Pekov I.V.², Pautov L.A.⁶, Britvin S.N.², Zubkova N.V.², Kasatkin A.V.⁶, Novgorodova E.A.⁷
Affiliations:
1. Institute of Problems of Chemical Physics
2. Faculty of Geology
3. Aff7
4. Institute of Geology of Ore Deposits, Petrography, Mineralogy, and Geochemistry
5. Institute of Experimental Mineralogy
6. Fersman Mineralogical Museum of Russian Academy of Sciences
7. Aff8
Issue: Vol 58, No 8 (2016)
Pages: 653-665
Section: New Minerals, Classification, and Nomenclature of Minerals
URL: https://ogarev-online.ru/1075-7015/article/view/215124
DOI: https://doi.org/10.1134/S1075701516080080
ID: 215124

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Abstract

A new mineral, tatarinovite, ideally Са₃Аl(SO₄)[В(ОН)₄](ОН)₆ · 12Н₂O, has been found in cavities of rhodingites at the Bazhenovskoe chrysotile asbestos deposit, Middle Urals, Russia. It occurs (1) colorless, with vitreous luster, bipyramidal crystals up to 1 mm across in cavities within massive diopside, in association with xonotlite, clinochlore, pectolite and calcite, and (2) as white granular aggregates up to 5 mm in size on grossular with pectolite, diopside, calcite, and xonotlite. The Mohs hardness is 3; perfect cleavage on (100) is observed. D_meas = 1.79(1), D_calc = 1.777 g/cm³. Tatarinovite is optically uniaxial (+), ω = 1.475(2), ε = 1.496(2). The IR spectrum contains characteristic bands of SO₄²⁻, CO₃²⁻, B(OH)₄⁻, B(OH)₃, Al(OH)₆^3-, Si(OH)₆^2-, OH^–, and H₂O. The chemical composition of tatarinovite (wt %; ICP-AES; H₂O was determined by the Alimarin method; CO₂ was determined by selective sorption on askarite) is as follows: 27.40 CaO, 4.06 B₂O₃, 6.34 A1₂O₃, 0.03 Fe₂O₃, 2.43 SiO₂, 8.48 SO₃, 4.2 CO₂, 46.1 H₂O, total is 99.04. The empirical formula (calculated on the basis of 3Ca apfu) is H_31.41Ca_3.00(Al_0.76Si_0.25)_Σ1.01 · (B_0.72S_0.65C_0.59)Σ_1.96O_24.55. Tatarinovite is hexagonal, space gr. P6₃, a = 11.1110(4) Å, c = 10.6294(6) Å, V = 1136.44(9) A³, Z = 2. Its crystal chemical formula is Са₃(Аl_0.70Si_0.30) · {[SO₄]_0.34[В(ОН)₄]_0.33[СO₃]0.₂₄}{[SO₄]_0.30[В(ОН)₄]_0.34[СО₃]_0.30[В(ОН)₃]_0.06}(ОН_5·73О_0.27) · 12Н₂O. The strongest reflections of the powder X-ray diffraction pattern [d, Å (I, %) (hkl)] are 9.63 (100) (100), 5.556 (30) (110), 4.654 (14) (102), 3.841 (21) (112), 3.441 (12) (211), 2.746 (10) (302), 2.538 (12) (213). Tatarinovite was named in memory of the Russian geologist and petrologist Pavel Mikhailovich Tatarinov (1895–1976), a well-known specialist in chrysotile asbestos deposits. Type specimens have been deposited at the Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow.

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Tatarinovite, new mineral, ettringite group, boron, rhodingite, Bazhenovskoe deposit, the Middle Urals

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Tatarinovite Са3Al(SO4)[В(ОH)4](ОH)6 · 12H2O, a new ettringite-group mineral from the Bazhenovskoe deposit, Middle Urals, Russia, and its crystal structure

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Tatarinovite Са₃Al(SO₄)[В(ОH)₄](ОH)₆ · 12H₂O, a new ettringite-group mineral from the Bazhenovskoe deposit, Middle Urals, Russia, and its crystal structure