Chemical Formula:
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(Ba,K)(Fe++,Mg)3(Si2Al2)O10 (OH,F)2 |
Composition:
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Molecular Weight = 526.29 g |
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Potassium |
2.97 % |
K |
3.58 % |
K2O |
0.00 % |
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Barium |
13.05 % |
Ba |
14.57 % |
BaO |
0.00 % |
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Magnesium |
4.62 % |
Mg |
7.66 % |
MgO |
0.00 % |
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Aluminum |
7.69 % |
Al |
14.53 % |
Al2O3 |
0.00 % |
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Iron |
21.22 % |
Fe |
27.30 % |
FeO |
0.00 % |
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Silicon |
13.34 % |
Si |
28.54 % |
SiO2 |
0.00 % |
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Hydrogen |
0.26 % |
H |
2.31 % |
H2O |
0.00 % |
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Oxygen |
34.50 % |
O |
0.00 % |
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0.00 % |
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Fluorine |
2.35 % |
F |
2.35 % |
F |
0.00 % |
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100.00 % |
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100.84 % |
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Empirical Formula:
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Ba0.5K0.4Fe2+2MgSi2.5Al1.5O10(OH)1.35F0.65 |
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Environment:
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Found in metamorphosed exhalative sedimentary rocks (banded iron-formations) enclosing the massive Pb-Zn-Cu-Ag sulfide orebodies. The polytype in the type material is 1M. A member o f the Brittle Mica group |
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Locality:
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Broken Hill mine, near Aggeneys, northern Cape Province, South Africa.. Link to
MinDat.org
Location Data.
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Name Origin:
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The name reflects the mineralÆs iron content and relationship to kinoshitalite |
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Synonym:
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IMA1999-026 |
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