Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:THOMSONITE-Ca
Formula:Ca2Na[Al5Si5O20] · 6H2O
Crystal System:Orthorhombic
Strunz Nr:8/J.21-70
Group:Zeolite Group Thomsonite series
References:AM 77 (1992), 685; HB2/2 (1995); EJM 10 (1998), 1037
Type Locality:Old Kilpatrick, Dumbarton, Scotland

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