Pale yellow-white inclusions of the rare mineral katayamalite in a matrix of albite and sugilite from the type locality for the mineral. Easily identifiable by shortwave UV light. From: Iwagi Island, Setonaikai, Ehime Prefecture, Japan. — Photo: David Hospital · CC BY-SA 4.0
Katayamalite
A cyclosilicate approved in 1982, named for mineralogist Nobuo Katayama.
Intro adapted from Wikipedia (CC BY-SA).
Katayamalite is an IMA-recognized mineral species in the silicate class, with the chemical formula KLi₃Ca₇Ti₂(SiO₃)₁₂(OH)₂.
It crystallizes in the monoclinic crystal system (space group C2/c). It is a member of the Baratovite structural group.
IMA symbol Kyl, IMA status: approved, named in 1982.
Index entry. This entry combines official IMA/RRUFF species data with published physical-property data and a Wikipedia introduction — a full written entry hasn’t been published yet.
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