Charoite Mineral Data

General Charoite Information
Chemical Formula:	K5Ca8(Si6O15)2(Si2O7)Si4O9(OH)•3(H2O)
Composition:	Molecular Weight = 1,828.68 gm
	Potassium 10.69 % K 12.88 % K₂O
	Calcium 17.53 % Ca 24.53 % CaO
	Silicon 27.65 % Si 59.14 % SiO₂
	Hydrogen 0.39 % H 3.45 % H₂O
	Oxygen 43.75 % O
	______ ______
	100.00 % 100.00 % = TOTAL OXIDE
Empirical Formula:	K₅Ca₈Si₁₈O₄₆(OH)•3(H₂O)
Environment:	Occurs within a syenite massif, in metasomatic rocks, formed between 200-250 deg. C and enriched with K at the contact of the massif with limestone.
IMA Status:	Approved IMA 1978
Locality:	Murun massif, Chara River area, Aldan Shield, SW Yakutia (Sakha Republic). Link to MinDat.org Location Data.
Name Origin:	Named for the impression that it gives: "chary" in Russian means "charms" or "magic" and not for the Chara River, which is 70 km away from the locality.