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English: Betafite crystal, chemical formula: (Ca,U)2(Ti,Nb,Ta)2(O,OH)7. locality „Silver Crater Mine“ in Bancroft, Ontario, Canada. Size ca. 27•23•20 mm. Collection M.R.
Deutsch: Betafit-Kristall, chemische Formel: (Ca,U)2(Ti,Nb,Ta)2(O,OH)7. Fundort: „Silver Crater Mine“ in Bancroft, Ontario, Kanada. Größe ca. 27•23•20 mm. Sammlung: M.R.
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