Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:PENNANTITE
Formula:Mn2+5Al(Si3Al)O10(OH)8
Crystal System:Monoclinic
Strunz Nr:8/H.23-60
Group:Chlorite Group
References:CM 21 (1983), 545; HB2/2 (1995)
Type Locality:Benallt mine, Rhiw, Lleyn Peninsula, Caernavonshire (Gwynedd), Wales, GB

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