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Chemical formula: (Ca,Na)(Nb,Ta,Ti)2(O,OH,F)6 2, record 1, English, - fersmite
Minéral (oxyde) très rare, faiblement radioactif, de couleur noire, du système cristallin orthorhombique. 2, record 1, French, - fersmite
Formule chimique : (Ca,Na)(Nb,Ta,Ti)2(O,OH,F)6 3, record 1, French, - fersmite
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