|Jmol 3D model||Interactive image|
|Molar mass||323.517 g/mol|
|Appearance||yellow powdery solid|
|Density||3.78 g/cm3, solid|
|Melting point||380 °C (716 °F; 653 K) (decomposes)|
|0.3 g/100 mL|
|Solubility||insoluble in nitric acid|
|117.69 J/mol K|
Std enthalpy of
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is ?)(|
Antimony pentoxide has the same structure as the B form of niobium pentoxide and can be derived from the rutile structure, with antimony coordinated by six oxygens in a distorted octahedral arrangement. The SbO6 octahedra are corner- and edge-sharing.
The hydrated oxide is prepared by hydrolysis of antimony pentachloride; or by acidification of potassium hexahydroxoantimonate(V). It may also be prepared by oxidation of antimony trioxide with nitric acid.
Properties and reactions
When heated at 700 °C the yellow hydrated pentoxide converts to an anhydrous white solid with a formula Sb6O13 containing both Sb(III) and Sb(V). Heating at 900 °C produces a white insoluble powder of Sb2O4 of both α and β forms. The β form consists of Sb(V) in octahedral interstices and pyramidal Sb(III) O4 units. In these compounds, Sb(V) atom is octahedrally coordinated to six –OH groups.
- M. Jansen (March 1979). "Die Kristallstruktur von Antimon(V)-oxid". Acta Crystallogr. B. 35 (3): 539–542. doi:10.1107/S056774087900409X.
- Pradyot Patnaik. Handbook of Inorganic Chemicals. McGraw-Hill, 2002, ISBN 0-07-049439-8
- Bartlett, Jeffrey (1997-03-19). "Colloidal Antimony Pentoxide in Flame Retarded ABS". Nyacol Products, Inc. Archived from the original on 3 August 2006. Retrieved 2006-07-28.
- "ANTIMONY PENTOXIDE". chemicalLAND21.com. Archived from the original on 27 August 2006. Retrieved 2006-07-28.
- Pradyot Patnaik (2002). Handbook of Inorganic Chemicals. McGraw-Hill. p. 54. ISBN 0-07-049439-8.
- "Antimony" in Handbook of Preparative Inorganic Chemistry, 2nd Ed. Edited by G. Brauer, Academic Press, 1963, NY. Vol. 1. p. 606.