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Stibiocolumbite group

[ A³⁺ ][ X O₄]

• [ Bi ][ Nb ]: Bismutocolumbite
• [ Sb ][ Nb ]: Stibiocolumbite
• [ Bi ][ Ta ]: Bismutotantalite
• [ Sb ][ Ta ]: Stibiotantalite

• Class: Tantalate, Niobate
• System: Orthorhombic