Gold(III) phosphate

Gold(III) phosphate
Names
Other names
  • Auric phosphate
Identifiers
3D model (JSmol)
  • InChI=1S/Au.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+3;/p-3
  • [O-]P(=O)([O-])[O-].[Au+3]
Properties
AuPO4
Molar mass 291.94 g/mol
Appearance Pale yellow solid
Density 5.74 g/cm3
Melting point 450 °C (842 °F; 723 K) (decomposes)
Insoluble
Solubility Insoluble in acetone
Structure
Monoclinic
4 (Au)
Square planar (around Au)
Thermochemistry
-169.8 kJ/mol (predicted)
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Gold(III) phosphate is a chemical compound with the formula AuPO4. It is a pale yellow solid that is insoluble in water and acetone. It decomposes at 450 °C into gold metal, phosphorus pentoxide, and oxygen.[1]

Production

Gold(III) phosphate is produced by the reaction of gold(III) hydroxide and phosphoric acid at 130 °C:[1]

AuO(OH) + H3PO4 → AuPO4 + 2H2O

It can also be produced by the replacement of phosphoric acid with a mixture of nitric acid and phosphorus pentoxide.

References

  1. ^ a b "Pd2P2O7 AND AuPO4 - NEW ANHYDROUS PHOSPHATES OF NOBLE METALS". Phosphorus Research Bulletin. 19. Japanese Association of Inorganic Phosphorus Chemistry: 77–82. 2005. doi:10.3363/prb1992.19.0_77.
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