Zharchikhite
(repeating unit)AlF(OH)2 IMA symbol Zha[1] Strunz classification 3.AC.05 Crystal system Monoclinic, pseudo-orthorhombic Identification Colour Colorless Crystal habit Elongated prismatic cryatals, massive, drusy coatings Cleavage Perfect (010) Tenacity Very brittle Mohs scale hardness 4.5 Luster Vitreous Diaphaneity Transparent Specific gravity 2.81 Optical properties Biaxial (-) Refractive index nα = 1.532 nβ = 1.552 nγ = 1.567 Birefringence δ = 0.035 2V angle 80° (calculated) References [2][3]
Zharchikhite is a halide mineral, a hydroxyl fluoride of aluminium; formula AlF(OH)2. It forms colourless, transparent crystals. Discovered in 1968, it is named after its original locality, the Zharchinskoya Deposit, which is in Buryatia, Russia.
References
- Webmineral - Zharchikhite
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