A phosphate phosphite is a chemical compound or salt that contains both phosphate and phosphite anions ( and ). These are mixed anion compounds or mixed valence compounds. Some have third anions.

Phosphate phosphites frequently occur as metal-organic framework compounds which are of research interest for gas storage, detection or catalysis. In these phosphate and phosphite form bridging ligands to hard metal ions. Protonated amines are templates.

Naming A phosphate phosphite compound may also be called a phosphite phosphate.

Production Phosphate phosphite compounds are frequently produced by hydrothermal synthesis, in which a water solution of ingredients is enclosed in a sealed container and heated. Phosphate may be reduced to phosphite or phosphite oxidised to phosphate in this process.

Related Related to these are the nitrite nitrates and arsenate arsenites.

List nameformularatio PO4:PO3mwsystemspace groupunit cell (Å)volumedensitypropertiesreferences1,4-Diammoniumbutane[(H3N(CH2)4NH3)2][Sc5F4(HPO3)6(H2PO3)2(PO4)]1:81300.8monoclinicC2/ma = 12.888, b = 14.835, c = 10.531, β = 103.093°, Z = 2 (at 93 K)1961.2Imidazole[C3N2H5]2[V(H2O)3(HPO3)4(HPO4)3]3:41003.766trigonalPc1a = 13.499, c = 18.120, Z = 122280.352.143green(C3H10NO)6[V8(H2O)6(PO4)2(HPO3)12]2:12trigonalPc1a = 13.5393, c = 18.22832893.8green(C4H8N2)3[V8(H2O)6(PO4)2(HPO3)12]2:12trigonalPc1a = 13.4922, c = 18.35892894.3greenL=cyclopentylammonium(L)4[V9(H2O)6(HPO3)10.5(HPO4)3.5(H2PO4)3]hexagonalP63/ma=13.4107 c =27.5678 Z=14293.71.81Mn5(μ-OH2)2(PO4)2(HPO3)2·2H2O2:2Iron(III) 2,2′-bipyridine phosphite−phposphate[FeIII(2,2′-bipyridine)(HPO3)(H2PO4)]1:1monoclinica = 10.5407, b = 6.4298, c = 10.6172, β = 113.890°, Z = 21.878colourlessFeIII(1,10-phenanthroline)(HPO3)(H2PO3)1:1monoclinicP21/ma = 10.180, b = 6.424, c = 11.6668, β = 115.59°, Z = 4668.21.880yellow{[C3H4N2]2[C5NH5]14[H15(Mo2O4)8Co16(PO4)14(HPO3)10(OH)3]}·5H2O14:106685.09monoclinicC2/ma = 29.724, b = 24.623, c = 20.687, β = 126.760°, Z = 2121301.830redTris(4-pyridyl)triazine zinc phosphate–phosphiteC54H60N18O42P10Zn9?2531.23hexagonalP63a = 15.6464, c = 19.788, Z = 24195.2yellow1-(2-Aminoethyl)piperazine tetrazinc diphosphate diphosphite(C6H17N3)[Zn4(PO4)2(HPO3)2]2:2monoclinicCca = 5.327, b = 17.146, c = 22.071, β = 94.58°, Z = 42009.5Zinc phosphate-phosphitetrans-(C6H15N2)2Zn4(PO4)2(HPO3)22:2841.78monoclinicP21/na = 9.706, b = 9.993, c = 27.557, β = 96.795°, Z = 42654.02.1071,3-Cyclohexanebis(methylamine)[H2CHBMA][Zn1.5Mn(HPO3)2.5(PO4)]·5H2O1:5monoclinicC2/ca = 33.929, b = 13.045, c = 8.971, β = 104.37°, Z = 23846.52-Hydroxypropylammonium dizinc hydrogenphosphite phosphate[C3H6(OH)NH3][Zn2(HPO3)(PO4)]1:1triclinicPa = 5.302, b = 8.934, c = 12.686, α = 74.35°, β = 88.54°, γ = 73.94°(Bis(Cyclohexane-1,3-bis(methylammonium)) bis(μ4-phosphato)-tetrakis(μ3-hydrogen phosphito)-manganese-tetra-zinc dihydrate)[H2CHBMA][Zn2Mn0.5(PO4)(HPO3)2]·H2O1:2monoclinicC2/ca = 33.929, b = 13.045, c = 8.971, β = 104.37°, Z = 43846Triethylenetetramine[C6N4H22]0.5[Zn3(PO4)2(HPO3)]2:1Zinc potassium phosphite phosphateN,N,N,N-tetramethylenediamine (TMEDA)(C6N2H18)2(C6N2H17)Ga15(OH)8(PO4)2(HPO4)12(HPO3)6·2H2O14:6Pa = 19.046, c = 8.331, Z = 12617.1Zirconium phosphate phosphiteγ-ZrPO4·HPO2(OH)·2H2O1:1layeredCadmium 1,10-phenanthroline phosphate phosphite oxalateCd2(phen)2(H2PO4)(H2PO3)(C2O4)1:1chainscatena-(Tris(hexane-1,6-diaminium) octakis(μ3-phosphonato)-hexakis(μ3-phosphato)-tris(μ2-hydrogen phosphato)hexaaqua-nonaindium[In9(H2O)6(HPO3)13(H2PO3)2(PO4)(HPO4)][(C6N2H18)3]2:15hexagonalP63/ma = 13.7676, c = 28.0624-Bipyridine(C10H10N2)1.5(H3O)3[In18(H2O)12(HPO4)12(HPO3)16(H2PO3)6]12:16hexagonalP63/ma = 13.784, c = 28.0584617catena-(Bis(propane-1,3-diammonium)-octakis(μ3-phosphito)-pentakis(μ2-hydrogen phosphito)-(μ2-dihydrogenphosphato)-hexaindium)[In6(HPO3)8(H2PO3)5(H2PO4)]·(C3N2H12)21:11orthorhombicPna21a = 26.7974, b = 9.8459, c = 18.5441, Z = 44892.8Pb2Al(HPO3)3(H2PO4)1:3orthorhombicCmcmPb2Ga(HPO3)3(H2PO4)1:3orthorhombicCmcmPb2Al(HPO3)2(HPO4)(H2PO4)2:2orthorhombicCmcmRubidium uranium(VI,IV) phosphate-phosphiteRb2[(UO2)2(UIV)(PO4)2(HPO3)2(H2O)]2:21316.94monoclinicC2/ca = 16.2421, b = 10.5049, c = 11.0936, β = 98.745°1870.84.702orange-yellowCaesium uranium(IV) phosphate-phosphiteCs2[U(PO4)2(HPO3)4]2:41489.76monoclinicC2/ma = 25.7396 b = 5.5906, c = 7.6334, β = 98.964°, Z = 21085.034.560blue-greenCaesium uranium(VI,IV) phosphate-phosphiteCs2[(UO2)(UIV)(HPO4)2(HPO3)2]2:21123.78triclinicPa = 6.8571, b = 11.1190, c = 12.0391, α = 63.861°, β = 77.481°, γ = 79.331°, Z = 2800.224.664yellow-orangeCs4[(UO2)8(HPO4)5(HPO3)5]·4H2O5:5monoclinicC2/ca = 18.5005, b = 10.971, c = 14.4752, β = 104.513°yellowCs4[U(PO4)8(HPO4)(HPO3)]9:1orthorhombicPmmna = 6.9321, b = 26.935, c = 10.9137pale greenCs10[U(PO4)4(HPO4)14(HPO3)5]·H2O15:5monoclinicC2/ma = 19.2966, b = 20.2914, c = 13.9293, β = 126.839°greenTl3[(UO2)2(H1.5PO4)(H0.5PO4)(H1.5PO3)2]2:21503.07tetragonalP42/mbca = 13.5382, c = 19.4008, Z = 83555.85.615yellow-greenTl2[(UO2)2(UIV)(H2O)(PO4)2(HPO3)2]2:21550.71monoclinicC2/ca = 16.2360, b = 10.4995, c = 11.0003, β = 99.027°, Z = 41851.995.562light green

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