Ammonium phosphomolybdate [1]
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Names
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Other names
Ammonium molybdophosphate
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Identifiers
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ChemSpider
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ECHA InfoCard
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100.031.545
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InChI=1S/12Mo.3H3N.H3O4P.H2O.36O/c;;;;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;3*1H3;(H3,1,2,3,4);1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;3*+1;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3*-1 Key: FPMGDWVRFQSMKO-UHFFFAOYSA-N InChI=1/12Mo.3H3N.H3O4P.H2O.36O/c;;;;;;;;;;;;;;;1-5(2,3)4;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/h;;;;;;;;;;;;3*1H3;(H3,1,2,3,4);1H2;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;/q;;;;;;;;;3*+1;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;3*-1/rMo12O40P.3H3N.H2O/c13-1(14,15)41-4(22,23)44-7(28,29)47-10(34,35)50-53(40,51-11(36,37)48-8(30,31)45-5(24,25)42-2(16,17)18)52-12(38,39)49-9(32,33)46-6(26,27)43-3(19,20)21;;;;/h;3*1H3;1H2/q-3;;;;/p+3 Key: FPMGDWVRFQSMKO-AHLDUZLPAZ
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O.O=[Mo](=O)(OP(=O)(O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo]([O-])(=O)=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo]([O-])(=O)=O)O[Mo](=O)(=O)O[Mo](=O)(=O)O[Mo]([O-])(=O)=O.[NH4+].[NH4+].[NH4+]
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Properties
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(NH4)3PMo12O40
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Molar mass
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1876.35 g/mol
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Appearance
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Yellow crystals
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Melting point
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Decomposes
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Chemical compound
Ammonium phosphomolybdate is the inorganic salt of phosphomolybdic acid with the chemical formula (NH4)3PMo12O40. It contains the remarkable phosphomolybdate ion complex.
Synthesis
Ammonium phosphomolybdate can be made by heating ammonium molybdate combined with phosphoric acid and nitric acid, yielding molybdenum trioxide, water, and ammonium phosphomolybdate precipitate.
- H3PO4 + 12 (NH4)2MoO4 + 21 HNO3 → (NH4)3PMo12O40↓ + 21 NH4NO3 + 12 H2O
References