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Oxycalciobetafite

Year of discovery: 1912 (Betafo, Madagascar), 1961 (Japan)

Locality list: 4 localities of oxycalciobetafite

• Ca₂(Ti,Nb)₂O₇
• (Ca,U)₂(Ti,Nb)₂O₇
• [Ca²⁺₂][O|((Ti,Nb)O₃)₂]^4-

• Class: Betafite group < Pyrochlore supergroup
• Class: Titanate - Oxide
• Radioactive: Strong

• Ca => U: Oxyuranobetafite

• Color: Reddish brown
• Luster: Resinous
• Diaphaneity: Opaque

• Cleavage: No
• Hardness: 4.5-5.5
• Density: 4.3

• System: Cubic
• Group: m3m, Fd3m
• Lattice: a=10.3

Synonym: Calciobetafite