Niobium Pentoxide
Title: Niobium Pentoxide
CAS Registry Number: 1313-96-8
CAS Name: Niobium oxide (Nb2O5)
Additional Names: columbium pentoxide; niobium(V) oxide
Molecular Formula: Nb2O5
Molecular Weight: 265.81
Percent Composition: Nb 69.90%, O 30.10%
Literature References: Separation: Münchow, Chem. Ztg. 84, 490, 527 (1960). Review of polymorphism: Schäfer et al., Angew. Chem. Int. Ed. 5, 40-52 (1966).
Properties: White, orthorhombic crystals. Becomes yellow on heating. d 4.6. mp 1520°. Insol in water; sol in HF, hot H2SO4.
Melting point: mp 1520°
Density: d 4.6

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