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CRYSTAL STRUCTURE OF DOUBLE SODIUM–COPPER(II) PARATUNGSTATE B, Na2Cu4W12O40(OH)2·22H2O, AND MIXED COPPER (II) PARATUNGSTATE B–HYDROXIDE, Cu5W12O40(OH)2·2Cu(OH)2·30H2O
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CRYSTAL STRUCTURE OF DOUBLE SODIUM–COPPER(II) PARATUNGSTATE B, Na2Cu4W12O40(OH)2·22H2O, AND MIXED COPPER (II) PARATUNGSTATE B–HYDROXIDE, Cu5W12O40(OH)2·2Cu(OH)2·30H2O
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CRYSTAL STRUCTURE OF DOUBLE SODIUM–COPPER(II) PARATUNGSTATE B, Na2Cu4W12O40(OH)2·22H2O, AND MIXED COPPER (II) PARATUNGSTATE B–HYDROXIDE, Cu5W12O40(OH)2·2Cu(OH)2·30H2O
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Journal Article
CRYSTAL STRUCTURE OF DOUBLE SODIUM–COPPER(II) PARATUNGSTATE B, Na2Cu4W12O40(OH)2·22H2O, AND MIXED COPPER (II) PARATUNGSTATE B–HYDROXIDE, Cu5W12O40(OH)2·2Cu(OH)2·30H2O
2021
Overview
AbstractThe conditions required for the formation of double sodium–copper(II) paratungstate B Na2Cu4[W12O40(OH)2]·22H2O (1) and mixed copper(II) paratungstate B–hydroxide Cu5[W12O40(OH)2]·2Cu(OH)2·30H2O (2) in Cu(NO3)2 – Na2WO4 – HNO3 – H2O solution acidified up to Z = ν(H+)/ν(WO42–) = 1.29 are determined. The synthesized salts 1 and 2 are examined using chemical analysis, X-ray single crystal analysis, and FTIR spectroscopy. The X-ray single crystal data obtained for compound 1: triclinic, \\(P1\\), a = 11.155(4) Å, b = 12.448(4) Å, c = 21.979(6) Å, α = 105.30(3)00B0, β = 91.99(3)00B0, γ = 112.51(3)00B0, V = 2687.8(16) Å3 at T = 293 K, Z = 2, dcalc = 4.419 g/cm3. The crystal data for 2: triclinic, \\(P1\\), a = 10.588(4) Å, b = 12.830(4) Å, c = 12.852(4) Å, α = 95.86(3)00B0, β = 113.65(3)00B0, γ = 91.76(3)00B0, V = 1586.0(10) Å3 at T = 293 K, Z = 1, dcalc = 4.119 g/cm3. In structure 1, Na atoms form distorted octahedra having common vertices with two [W12O40(OH)2]10– anions, and there are three types of coordination polyhedra of Cu atoms: distorted tetragonal bipyramids, trigonal bipyramids, and centrosymmetric rhombic bipyramids. In structure 2, the Cu1, Cu2, and Cu5 atoms are located in the centers of symmetry; their coordination polyhedra are rhombic bipyramids. The anions [W12O40(OH)2]10– are connected by pairs of tetragonal pyramids Cu3O5 and Cu4O5 having a common edge of their bases, and their vertices are oriented in opposite directions with respect to the base plane, similarly to the structure of Cu(OH)2.
Publisher
Springer Nature B.V
Subject
