Compositional and Textural Variations in Hainite-(Y) and Batievaite-(Y), Two Rinkite-Group Minerals from the Sakharjok Massif, Keivy Alkaline Province, NW Russia

Compositional and textural variations in the rinkite group, seidozerite supergroup minerals, batievaite-(Y), hainite-(Y) and close to them titanosilicates from the Sakharjok massif were studied. Statistical analysis allowed for defining two major substitution schemes leading to batievaite-(Y) and ca...

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Bibliographic Details
Published in:Minerals
Main Authors: Ekaterina A. Selivanova, Lyudmila M. Lyalina, Yevgeny E. Savchenko
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2018
Subjects:
batievaite-(Y)
hainite-(Y)
titanosilicate
rinkite group minerals
Kola Peninsula
Sakharjok massif
Keivy alkaline province
transformation mineral species
Mineralogy
QE351-399.2
kola peninsula
Online Access:https://doi.org/10.3390/min8100458
https://doaj.org/article/eaee78bfaac942af9d5ff62bc25e96a1
Description
Summary:Compositional and textural variations in the rinkite group, seidozerite supergroup minerals, batievaite-(Y), hainite-(Y) and close to them titanosilicates from the Sakharjok massif were studied. Statistical analysis allowed for defining two major substitution schemes leading to batievaite-(Y) and cation-deficient titanosilicates forming: Ca2+ + Na+ + F− ↔ □ + Y3+ + (OH)− and Ca2+ + Na+ ↔ □ + REE3+. Batievaite-(Y) and other cation-deficient titanosilicates are the earlier minerals formed by solid state transformation of the primary full-cation phase. Hainite-(Y) is a later mineral. It forms rims around earlier titanosilicates, or, less often, separate crystals.

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