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Sewardite from
Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia


08733900017365095781690.jpg
Sewardite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
01552960017365095791440.jpg
Sewardite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
08733900017365095781690.jpg
Sewardite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
01552960017365095791440.jpg
Sewardite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
08733900017365095781690.jpg
Sewardite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
01552960017365095791440.jpg
Sewardite

Tsumeb Mine, Tsumeb, Oshikoto Region, Namibia
Locality type:Mine
Classification
Species:Sewardite
Formula:CaFe23+(AsO4)2(OH)2
Comments:occurs as platy to compact anhedral to subhedral masses that do not exceed 0.3 mm in maximum size and are randomly scattered throughout the dark green to black matrix. Sewardite is easily confused with the more common carminite; chemical analysis is required to distinguish the two minerals
Abundance at site:Very Rare
Confirmation
Validity:Valid - Type Locality
Data
Mineral Data:Click here to view Sewardite data
Locality Data:Click here to view Tsumeb Mine (Ongopolo Mine), Tsumeb, Oshikoto Region, Namibia
Data Identifiers
Mindat Occurrence Record ID:100349
Long-form Identifier:1:3:100349:9
GUID (UUID V4):0
References
Roberts, A. C., Cooper, M. A., Hawthorne, F. C., Criddle, A. J., Stirling, J. A.R. (2002) Sewardite, CaFe3+2(AsO4)2(OH)2, the Ca-analogue of carminite, from Tsumeb, Namibia: description and crystal structure. The Canadian Mineralogist, 40 (4) 1191-1198 doi:10.2113/gscanmin.40.4.1191
 
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