Plutonium(III) arsenide

Plutonium(III) arsenide

Names
Other names Plutonium monoarsenide
Identifiers
CAS Number	12006-02-9
3D model (JSmol)	Interactive image
PubChem CID	129627908
InChI InChI=1S/As.Pu Key: IFUISAQYPYTWOE-UHFFFAOYSA-N
SMILES [As]#[Pu]
Properties
Chemical formula	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
Crystal structure	Cubic
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Plutonium arsenide is a binary inorganic compound of plutonium and arsenic with the formula PuAs.

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]

References

1. Morss, L. R.; Edelstein, Norman M.; Fuger, Jean (31 December 2007). The Chemistry of the Actinide and Transactinide Elements (3rd ed., Volumes 1-5). Springer Science & Business Media. p. 1022. ISBN   978-1-4020-3598-2 . Retrieved 11 January 2022.
2. NBS Monograph. National Bureau of Standards. 1959. p. 65. Retrieved 11 January 2022.
3. Gorum, A. E. (10 February 1957). "The crystal structures of PuAs, PuTe, PuP and PuOSe" . Acta Crystallographica . 10 (2): 144. doi:10.1107/S0365110X5700047X . Retrieved 11 January 2022.
4. Dabos-Seignon, S.; Benedict, U.; Spirlet, J. C.; Pages, M. (15 July 1989). "Compression studies on PuAs up to 45 GPa" . Journal of the Less Common Metals . 153 (1): 133–141. doi:10.1016/0022-5088(89)90539-0. ISSN   0022-5088 . Retrieved 11 January 2022.
5. Blaise, A.; Fournier, J. M.; Salmon, P. (1 September 1973). "Magnetic properties of plutonium monoarsenide" . Solid State Communications . 13 (5): 555–557. Bibcode:1973SSCom..13..555B. doi:10.1016/S0038-1098(73)80012-2. ISSN   0038-1098 . Retrieved 11 January 2022.