Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:THOROGUMMITE
Formula:Th(SiO4)1-x(OH)4x
Crystal System:Quadratic (Tetragonal)
Strunz Nr:8/A.09-50
Group:Zircon Group
References:AM 38 (1953), 1007; HB2/2 (1995)
Type Locality:Bluffton, Llano Co., Texas, USA

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