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Uranyl metaphosphate
Identifiers
CAS Number	25734-76-3 ;
3D model (JSmol)	Interactive image;
CompTox Dashboard (EPA)	DTXSID701260602 ;
	InChI InChI=1S/2HO3P.2O.U/c21-4(2)3;;;/h2(H,1,2,3);;;/q;;;;+2/p-2 Key: YFRVLNOCPYUMID-UHFFFAOYSA-L;
	SMILES [O-]P(=O)=O.[O-]P(=O)=O.O=[U+2]=O;
Properties
Chemical formula	UP2O8
Molar mass	427.971 g/mol
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Uranyl metaphosphate is a compound of uranium, phosphorus, and oxygen. It is one of the phosphates of uranium with the formula [UO₂(PO₃)₂]_n. This long-chain compound is formed via the thermal decomposition of UO₂(H₂PO₄)₂·3H₂O.^[1] Double salts, such as NaUO₂(PO₃)₃ and CsUO₂(PO₃)₃, are known.^[2]

At elevated temperature, it decomposes to UP₂O₇, liberating oxygen.^[3]

References

^ Kamo, Mutsukazu; Ohashi, Shigeru (1970). "Thermal Decomposition of Uranyl Dihydrogen Orthophosphate Trihydrate". Bulletin of the Chemical Society of Japan. 43 (1): 84–89. doi:10.1246/bcsj.43.84. ISSN 0009-2673.
^ Lavrov, A. V. Study of condensed uranyl phosphates. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1979. 15 (6): 942-946. ISSN 0002-337X.
^ Barten, H. (1988). "The thermochemistry of uranyl phosphates". Thermochimica Acta. 126: 375–383. doi:10.1016/0040-6031(88)87282-4. ISSN 0040-6031.

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[KamoOhashi1970-1] Kamo, Mutsukazu; Ohashi, Shigeru (1970). "Thermal Decomposition of Uranyl Dihydrogen Orthophosphate Trihydrate". Bulletin of the Chemical Society of Japan. 43 (1): 84–89. doi:10.1246/bcsj.43.84. ISSN 0009-2673.

[2] Lavrov, A. V. Study of condensed uranyl phosphates. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy, 1979. 15 (6): 942-946. ISSN 0002-337X.

[Barten1988-3] Barten, H. (1988). "The thermochemistry of uranyl phosphates". Thermochimica Acta. 126: 375–383. doi:10.1016/0040-6031(88)87282-4. ISSN 0040-6031.

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