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Formulas which begin with Nb₂O

All formulas are in Hill order.

• Nb₂O₂______ (2 species)
• Nb₂O₃ (Nb2O3)
• Nb₂O₄^- (Nb2O4 anion)
• Nb₂O₅______ (2 species)
• Nb₂O₆^- (Nb2O6 anion)
• Nb₂O₇______ (2 species)

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