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]
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Other names
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3D model (JSmol)
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PubChem CID
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| 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 | |
Std enthalpy of
formation (ΔfH⦵298) |
-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).
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Production
editGold(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
edit- ^ 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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