CARYOCHROITE IS A RARE MINERAL FROM THE GROUP OF TITANOSILICATES: CRYSTAL STRUCTURE, CRYSTAL CHEMISTRY AND THERMAL PROPERTIES

S. V. Soboleva; Соболева С. В.; N. M. Boeva; Боева Н. М.; P. M. Kartashov; Карташов П. М.; N. S. Bortnikov; Бортников Н. С.

doi:10.31857/S2686739723600339

CARYOCHROITE IS A RARE MINERAL FROM THE GROUP OF TITANOSILICATES: CRYSTAL STRUCTURE, CRYSTAL CHEMISTRY AND THERMAL PROPERTIES

Autores: Soboleva S.V.¹, Boeva N.M.¹, Kartashov P.M.¹, Bortnikov N.S.¹
Afiliações:
1. Institute of Geology of Ore Deposits, Petrography, Mineralogy and Geochemistry of the Russian Academy of Sciences
Edição: Volume 510, Nº 2 (2023)
Páginas: 166-173
Seção: MINERALOGY
##submission.dateSubmitted##: 30.01.2025
##submission.datePublished##: 01.06.2023
URL: https://archivog.com/2686-7397/article/view/649647
DOI: https://doi.org/10.31857/S2686739723600339
EDN: https://elibrary.ru/UKZBDO
ID: 649647

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Resumo

The crystal structure of rare titanosilicate cariochroite was deternined using X-ray powder and srlected area diffraction data. The crystallochemical formula proposed – [Na(Sr_0.5Ca_0.5)Mg]₃[Fe\(_{8}^{{3 + }}\)Mn(\({\text{Fe}}_{{0.5}}^{{2 + }}{\kern 1pt} {{\square }_{{{\text{0}}{\text{.5}}}}}\))]₁₀(Ti₂Si₁₂)O₃₇(OH)₁₄(Н₂О)₃. Monoclinic unit cell parameters are: a 16.550(3), b 5.281(2), c 24.25(3) Å, β 93.0°, Z = 2, sp. gr. P2/n. The crystal structure represent the new type of complex Ti–Si–nrt, provided the big volune canals contaning some exchange cations, OH groups and water molecules.

Palavras-chave

titanosilicate, cariochroite, crystal structure, thermal analysis

Bibliografia

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