Actinium(III) phosphate

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

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]