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Synthesis

Fusion of stoichiometric amounts of pure substances in a vacuum or helium atmosphere.¹ The reaction is exothermic:

Passing arsine through heated plutonium hydride:

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. 978-1-4020-3598-2 ↩

2. NBS Monograph. National Bureau of Standards. 1959. p. 65. Retrieved 11 January 2022. https://books.google.com/books?id=SUB7V7hqZTMC&dq=plutonium+arsenide+PuAs&pg=RA1-PA65 ↩

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. http://scripts.iucr.org/cgi-bin/paper?S0365110X5700047X ↩

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. https://www.sciencedirect.com/science/article/abs/pii/0022508889905390 ↩

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. https://www.sciencedirect.com/science/article/abs/pii/S0038109873800122 ↩