Chromphyllite Mineral Data

General Chromphyllite Information
Chemical Formula:	(K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2
Composition:	Molecular Weight = 415.64 gm
	Potassium 7.06 % K 8.50 % K₂O
	Barium 8.26 % Ba 9.22 % BaO
	Aluminum 8.11 % Al 15.33 % Al₂O₃
	Chromium 9.38 % Cr 13.71 % Cr₂O₃
	Silicon 20.27 % Si 43.37 % SiO₂
	Hydrogen 0.36 % H 3.25 % H₂O
	Oxygen 44.27 % O
	Fluorine 2.29 % F 2.29 % F
	- % F -0.96 % -O=F₂
	______ ______
	100.00 % 94.71 % = TOTAL OXIDE
Empirical Formula:	K_0.75Ba_0.25Cr_0.75Al_1.25Si₃O₁₀(OH)_1.5F_0.5
Environment:	Cr-enriched layers in quartz-diopside rocks.
IMA Status:	Approved IMA 1995 (Dana # Added)
Locality:	Slyudyanka complex, Southern Lake Baikal region, Siberia, Russia. Link to MinDat.org Location Data.
Name Origin:	The name alludes to the composition and micaceous cleavage.
Synonym:	IMA1995-052