Plutonium(III) arsenide
Chemical compound
From Wikipedia, the free encyclopedia
Plutonium arsenide is a binary inorganic compound of plutonium and arsenic with the formula PuAs.
| Names | |
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| Other names
Plutonium monoarsenide | |
| Identifiers | |
3D model (JSmol) |
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PubChem CID |
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| Properties | |
| AsPu | |
| Molar mass | 318,92 |
| Appearance | Black or dark-gray crystals |
| Density | 10.39 g/cm3 |
| Melting point | 2,420 °C (4,390 °F; 2,690 K) |
| Structure | |
| Cubic | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Synthesis
Fusion of stoichiometric amounts of pure substances in a vacuum or helium atmosphere.[1] The reaction is exothermic:
- Pu + As → PuAs
Passing arsine through heated plutonium hydride:
- 2PuH2 + 2AsH3 → 2PuAs + 5H2
Physical properties
Plutonium arsenide forms black or dark gray crystals of a cubic system,[2] space group Fm3m, cell parameters a = 0.5855 nm, Z = 4, structure of the NaCl-type.[3]
At high pressure (about 35 GPa), a phase transition occurs to a structure of the CsCl-type.[4]
At a temperature of 129 K, PuAs transforms into a ferromagnetic state.[5]