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Mansfieldite - Djebel Debagh mine - Guelma - Guelma prov. - Algeria
(#:MINS9140)
Nice specimen of this rare arsenate of aluminium, with well shaped green coloured crystals over the surface.
Formula :
Al[AsO
4
] * 2 H
2
O
System:
orthorhombic
Hardness:
3½-4
Rarity:
not common
Strunz id:VII/C.9-70 - PHOSPHATES, ARSENATES and VANADATES
Name origin:
After George R. Mansfield (1875-1947), American geologist, U.S. Geological Survey.
Specimen weight:125 gr.
Crystal size:Up to 1 mm
Overall size: 55mm x 40 mm x 40 mm
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Algerien
3-(SC) - Small Cabinet (Max 9.4 cm)
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