Lead heptaphosphide
Chemical compound
From Wikipedia, the free encyclopedia
Lead heptaphosphide is the only binary phosphide currently known to be formed by lead and phosphorus. The chemical formula is PbP7, which contains [P7]2− atom clusters. This compound is stable in the air.[1]
| Identifiers | |
|---|---|
3D model (JSmol) |
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| Properties | |
| PbP7 | |
| Molar mass | 424.03 |
| Appearance | black solid |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Preparation
Lead heptaphosphide can be produced by the reaction of red phosphorus and lead:
- 7 P4 + 4 Pb → 4 PbP7
It decomposes again into the elements at 550 K (277 °C).[2]
Properties
Lead heptaphosphide crystallises in the monoclinic crystal system, with space group P21/c, a=970.70(11), b=673.34(10), c=1243.89(18) pm and β=122.55(1)°. Each phosphorus atom in the phosphorus cluster is connected to the other six.