Lead heptaphosphide
| Identifiers | |
|---|---|
| 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).
| |
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]
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.
References
- PMID 25010209.
- doi:10.1016/j.jssc.2015.12.028. Archived from the original on 2019-06-02. Retrieved 2019-05-28.)
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