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Ferri-winchite from
Savage River Mines, Corinna-Savage River district, Waratah-Wynyard municipality, Tasmania, Australia


Locality type:Mine
Classification
Species:Ferri-winchite
Formula:◻(NaCa)(Mg4Fe3+)Si8O22(OH)2
Comments:Green and Spiller(1977)publish the following analysis of a blue amphibole:

(Na0.03K0.01)0.04(Na0.57Ca1.43)2.00(Mg3.06Mn0.03Fe2+0.91Fe3+0.74Al0.21Ti0.01)4.96(Si7.64Al0.36)8.00O22((OH)2

Ferri-winchite is visually and optically indistinguishable from ferri-barroisite and magnesio-riebeckite, see magnesio-riebeckite
Colour:Blue
Quality for species:Rock forming mineral/non-crystalline/little interest for collectors.(##)
Confirmation
Validity:Believed Valid
Data
Mineral Data:Click here to view Ferri-winchite data
Locality Data:Click here to view Savage River Mines, Corinna-Savage River district, Waratah-Wynyard municipality, Tasmania, Australia
Data Identifiers
Mindat Occurrence Record ID:907783
Long-form Identifier:1:3:907783:6
GUID (UUID V4):0
References
R Bottrill, G Cumming & J Taheri (in prep) Mineralogical studies of the Savage River ore deposits. Tasmanian Geological Survey Record (URXXXX/XX)
Trevor H. Green and Anthony R. Spiller(1977):Blue amphibole from Precambrian metabasalts, Savage River, Tasmania. American Mineralogist, Volume 62, pages 164_166.
 
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