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Ferro-holmquistite from
Greenbushes Mine, Greenbushes tinfield, Bridgetown-Greenbushes Shire, Western Australia, Australia


Locality type:Mine
Classification
Species:Ferro-holmquistite
Formula:◻Li2(Fe32+Al2)(Si8O22)(OH)2
Chemical Analyses:
Oxide wt%:
1
SiO259.37 %
TiO20.03 %
Al2O311.86 %
Cr2O30.00 %
MgO7.32 %
CaO0.03 %
MnO0.18 %
Fe2O30.00 %
FeO15.14 %
ZnO0.02 %
Na2O0.17 %
K2O0.03 %
F0.07 %
Cl0.01 %
Li2O3.46 %
H2O2.19 %
Total:99.88 %
Empirical formulas:
1A(K0.01Na0.01)B(Li1.88Mg0.08Na0.03Fe2+ 0.01) C(Al1.89Fe2+ 1.70Mg1.39Mn2+ 0.02) TSi8.00O22(OH1.97F0.03)
Sample references:
11
Camara, F.; Oberti, R. (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in BLi amphiboles. American Mineralogist, 90 (7). 1167-1176 doi:10.2138/am.2005.1793
Comments:The relative abundance between holmquistite and ferro-holmquistite has not been systematically studied, and ferro-holmquistite may be more common than holmquistite. The ferro-holmquistite type material cnsists of elongated black to bluish-violet prismatic crystals, whose size is typically in the range 0.2–0.5 mm,
Habit:prismatic
Colour:pinkish-bluish-violet-black
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Ferro-holmquistite data
Locality Data:Click here to view Greenbushes Mine, Greenbushes tinfield, Bridgetown-Greenbushes Shire, Western Australia, Australia
Data Identifiers
Mindat Occurrence Record ID:314457
Long-form Identifier:1:3:314457:2
GUID (UUID V4):0
References
Camara, F.; Oberti, R. (2005) The crystal-chemistry of holmquistites: Ferroholmquistite from Greenbushes (Western Australia) and hints for compositional constraints in BLi amphiboles. American Mineralogist, 90 (7). 1167-1176 doi:10.2138/am.2005.1793
 
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