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Riebeckite from
Masokani Hill, Sultan Hamud, Umba Valley Region, Makueni County, Kenya


Locality type:Hill
Classification
Species:Riebeckite
Formula:◻Na2(Fe32+Fe23+)Si8O22(OH)2
Comments:Riebeckite from this locality is analysed with the following results: SiO2 50,21%, Ti02 0,12%,Al2O3 1,66%, Fe2O3 16.51%, FeO 21.23%. MnO 0.09%, MgO 1.07%. CaO 0.55% Na2O 6.46% K20 0.52% OH 1,65% F 0,10%. Total 100.17.

Acicular crystals up to 18 cm with quartz in vugs are described.
Quality for species:Good crystals or rich for species - important (!)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Riebeckite data
Locality Data:Click here to view Masokani Hill, Sultan Hamud, Umba Valley Region, Makueni County, Kenya
Data Identifiers
Mindat Occurrence Record ID:775845
Long-form Identifier:1:3:775845:4
GUID (UUID V4):0
References
Campell Smith, W., Hey, M.H. and Kempe, D.R.C. (1968): Riebeckite from near Sultan Hamud, Machalcos District, Kenya. Mineralogical Magazine 36, 1164-1167. [http://www.minersoc.org/pages/Archive-MM/Volume_36/36-284-1164.pdf]
 
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