Plutonium(III) arsenide
Names
Other names
Plutonium monoarsenide
Identifiers
3D model (JSmol)
  • InChI=1S/As.Pu
    Key: IFUISAQYPYTWOE-UHFFFAOYSA-N
  • [As].[Pu]
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).

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.
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