Carmichaelite Mineral Data

General Carmichaelite Information
Chemical Formula:	(Ti,Cr,Fe)[O2-x(OH)x],x~0.5
Composition:	Molecular Weight = 76.54 gm
	Titanium 38.79 % Ti 64.71 % TiO₂
	Chromium 12.91 % Cr 16.88 % CrO
	Iron 5.84 % Fe 7.51 % FeO
	Hydrogen 0.66 % H 5.88 % H₂O
	Oxygen 41.81 % O
	______ ______
	100.00 % 94.98 % = TOTAL OXIDE
Empirical Formula:	Ti_0.62Cr_0.19Fe²⁺_0.08O_1.5(OH)_0.5
Environment:	Microscopic inclusions in mantle-derived pyrope crystals. The mineral is inferred to have co-precipitated with the pyrope host in the presence of a fluid or melt phase at 650-750 de g C and 20-25 kbar pressures.
IMA Status:	Approved IMA 1996 (Dana # Added)
Locality:	Garnet Ridge, an ultramafic diatreme on the Colorado Plateau in Arizona, USA. Link to MinDat.org Location Data.
Name Origin:	Named for Ian S. E. Charmchael, Professor of Geology at the University of California, Berkeley, in recognition
Synonym:	ICSD 89831
	IMA1996-062