TY JOUR TI Heat resistance study of mineral mica species KW mica KW muscovite KW phlogopite KW vermiculite KW non-metal ore industry KW mineral KW mica processing enterprises JO Proceedings of the Komi Science Centre of the Ural Division of the Russian Academy of Sciences AU Fedorova, S.V. PY 2023 IS 0 PB FSBI FIC "Komi Scientific Center of the Ural Branch of the Russian Academy of Sciences"