Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:TOMBARTHITE-(Y)
Formula:Y4(Si,H4)4O12-x(OH)4+2x
Crystal System:Monoclinic
Strunz Nr:8/A.11-20
References:Lithos 1 (1968), 113; AM 54 (1969), 327; HB2/2 (1995)
Type Locality:Høgtuva, Evje, Nordland, Norway

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