Actinium(III) phosphate

Actinium(III) phosphate is a white-colored chemical compound of the radioactive element actinium. This compound was created by reacting actinium(III) chloride with monosodium phosphate in aqueous hydrochloric acid. This resulted in the hemihydrate AcPO4·1/2H2O, whose structure was confirmed by x-ray diffraction to match that of lanthanum phosphate. To become anhydrous, it was heated to 700 °C, which resulted in a solid that was black (presumably due to the presence of impurities), and whose specific X-ray structure did not match that of other known correspond to other actinide phosphates.[1]

Actinium(III) phosphate[1]
Names
Other names
Actinium monophosphate
Identifiers
3D model (JSmol)
  • InChI=1S/Ac.H3O4P/c;1-5(2,3)4/h;(H3,1,2,3,4)/q+3;/p-3
    Key: PVLPTTWSKILMQQ-UHFFFAOYSA-K
  • [O-]P(=O)([O-])[O-].[Ac+3]
Properties
AcPO4
Molar mass 321.9714 g/mol
Appearance White solid
Density 5.48 g/cm3
Structure
hexagonal[2]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

References
  1. the University of Michigan (1948). The Preparation of Actinium Compounds. U.S. Atomic Energy Commission, Technical Information Division. p. 4. Retrieved 16 April 2021.
  2. Zachariasen, W. H. (1948). "Crystal chemical studies of the 5f-series of elements. I. New structure types". Acta Crystallographica. 1 (5): 265–268. doi:10.1107/S0365110X48000703.
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