Mineralogy Database

Carmichaelite Mineral Data

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General Carmichaelite Information

Help on Chemical  Formula: Chemical Formula: (Ti,Cr,Fe)[O2-x(OH)x],x~0.5
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Ti0.62Cr0.19Fe2+0.08O1.5(OH)0.5
Help on Environment: 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.
Help on IMA Status: IMA Status: Approved IMA 1996 (Dana # Added)
Help on Locality: Locality: Garnet Ridge, an ultramafic diatreme on the Colorado Plateau in Arizona, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ian S. E. Charmchael, Professor of Geology at the University of California, Berkeley, in recognition
Help on Synonym: Synonym: ICSD 89831