Zinc pyrophosphate

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Zinc pyrophosphate[1]
Zinc pyrophosphate
Zinc pyrophosphate
Names
Other names
Dizinc diphosphate
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.028.367 Edit this at Wikidata
UNII
  • InChI=1S/H4O7P2.2Zn/c1-8(2,3)7-9(4,5)6;;/h(H2,1,2,3)(H2,4,5,6);;/q;2*+2/p-4 checkY
    Key: OMSYGYSPFZQFFP-UHFFFAOYSA-J checkY
  • InChI=1/H4O7P2.2Zn/c1-8(2,3)7-9(4,5)6;;/h(H2,1,2,3)(H2,4,5,6);;/q;2*+2/p-4
    Key: OMSYGYSPFZQFFP-XBHQNQODAA
  • [Zn+2].[Zn+2].[O-]P([O-])(=O)OP([O-])([O-])=O
Properties
Zn2P2O7
Molar mass 304.72 g/mol
Appearance White crystalline powder
Density 3.75 g/cm3
Insoluble
Solubility Soluble in dilute acids
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Zinc pyrophosphate (Zn2P2O7) is an ionic inorganic chemical compound composed of Zn2+ cations and pyrophosphate anions.

Zinc pyrophosphate can be obtained from the thermal decomposition of zinc ammonium phosphate.[2]

2 ZnNH4PO4 → Zn2P2O7 + 2 NH3 + H2O

It can also be obtained from the reaction between sodium carbonate, zinc oxide, and ammonium dihydrogen phosphate.[3]

Na2CO3 + 2 ZnO + 2 (NH4)H2PO4 → Zn2P2O7 + 2 NaOH + 2 NH3 + 2 H2O + CO2

It is also produced when a strongly acidic solution of zinc sulfate is heated with sodium pyrophosphate.[4]

2 ZnSO4 + Na4P2O7 → Zn2P2O7 + 2 Na2SO4

Another method is precipitating zinc as a phosphate, then heating over 1123 K.[citation needed]

Properties

Uses

References

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