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Catapleiite

Type Locality
Låven (Skådön; Lamö; Lamanskjaer), Langesundsfjorden, Larvik, Vestfold, Norway
Mineral Data
Na2Zr(Si3O9)·2H2O
Strunz: 
9.CA.15
Physical Properties
Crystal System: 
Hexagonal
Hardness: 
5.5 - 6.0
Tenacity: 
brittle
Synonyms
Synonyms: 
Catapleite