Chemical Preparations and X-ray Diffraction Data of Cyclotriphosphates Type MnMII2(P3O9)2.nH2O with MII Alkaline Earths

Abstract

Chemical preparation methods and X-ray powder diffraction data, XPRD, are reported for four cyclotriphosphates associated with manganese MnMII2(P3O9)2.nH2O with MII alkaline earths. These phosphates are MnCa2(P3O9)2.10H2O, MnCa2(P3O9)2, MnSr2(P3O9)2.4H2O and MnBa2(P3O9)2.6H2O. The condensed phosphates MnSr2(P3O9)2.4H2O and MnBa2(P3O9)2.6H2O were prepared by the method of ion-exchange resin, whereas MnCa2(P3O9)2.10H2O was prepared by using nitrates and MnCa2(P3O9)2 was obtained by total thermal dehydration of MnCa2(P3O9)2.10H2O. MnSr2(P3O9)2.4H2O crystallizes in the triclinic system, space group is P-1, Z = 1, the unit-cell parameters are : a = 6,653(1)Å, b = 7,110(1)Å, c = 5,123(1)Å, α = 103,37(2)°, β = 95,81(2)°, γ = 93,04(2)° and the factors of merit, M(20) = 29.6 and F(30) = 34.4. MnCa2(P3O9)2.10H2O crystallizes in the monoclinic system, space group is P21/n, the unit-cell parameters of MnCa2(P3O9)2.10H2O are : a = 9.631 (5) Å, b = 18.173 (7) Å, c = 7.976 (4) Å, β = 109.438 (4), Z = 2 and V = 1045,1 (3) Å3. MnCa2(P3O9)2 an hexagonal symetry, Z = 2, the space group is P3 and the unit-cell parameters are a = 7.392 Å (9) and c = 20.134 (2) Å. MnBa2(P3O9)2.6H2O crystallizes in the triclinic unit cell, , Z = 2, the space group is P-1 and its unit-cell parameters are : a = 7,479 (6)Å, b = 11,942 (8)Å, c = 12,786 (9)Å, α = 105,94(7)°, β = 98,40°(7), γ = 98,16 (7)° and V = 1046,8 (2)Å3.