Kalsilite
(repeating unit)KAlSiO4 IMA symbol Kls[1] Crystal system Hexagonal Crystal class 6 2 2 – Trapezohedral Space group P6322 (no. 182) Identification Color Colorless, white, gray Tenacity Brittle Mohs scale hardness 6 Luster Vitreous, greasy Streak White Diaphaneity Transparent, Translucent Specific gravity 2.59–2.62 References [2]
Vitreous white to grey feldspathoidal mineral
Kalsilite (KAlSiO4) is a vitreous white to grey feldspathoidal mineral that is found in some potassium-rich lavas, such as from Chamengo Crater in Uganda. It has a relative hardness of 5.5.
References
- Webmineral.com
- Handbook of Mineralogy
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