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Pennantite
Type Locality
Benallt Mine (Tyddyn Meirion mine; Ty Canol mine), Rhiw, Llanfaelrhys, Lleyn Peninsula, Gwynedd (Caernarvonshire), Wales, UK
Mineral Data
Mn
2+
5
Al(AlSi
3
O
10
)(OH)
8
Strunz:
9.EC.55
Physical Properties
Hardness:
2.0 - 2.5
Tenacity:
flexible
