Neodymium tungstate

Neodymium tungstate is an inorganic compound, a salt of neodymium and tungstic acid with the chemical formula Nd₂(WO₄)₃. It forms hydrated light purple crystals^[1] that are slightly soluble in water.

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• Reacting neodymium(III) oxide and tungsten(VI) oxide would produce anhydrous neodymium tungstate:

Failed to parse (syntax error): {\displaystyle \ce{Nd2O3 \ + \ 3WO3 ->[{}\atop\ce{1000^\circ C}] Nd2(WO4)3}}

• The nonahydrate could be produced by the reaction of sodium tungstate and neodymium(III) nitrate:

${\displaystyle 3\mathrm{N}\mathrm{a}{\phantom{A}}_2\mathrm{W}\mathrm{O}{\phantom{A}}_4+2\mathrm{N}\mathrm{d}(\mathrm{N}\mathrm{O}{\phantom{A}}_3){\phantom{A}}_3⟶\mathrm{N}\mathrm{d}{\phantom{A}}_2(\mathrm{W}\mathrm{O}{\phantom{A}}_4){\phantom{A}}_3\cdot 9\mathrm{H}{\phantom{A}}_2\mathrm{O}(\mathrm{v})+6\mathrm{N}\mathrm{a}\mathrm{N}\mathrm{O}{\phantom{A}}_3}$

Neodymium tungstate forms the crystal of a monoclinic crystal system, with space group A 2/a, lattice constants a = 1.151 nm, b = 1.159 nm, c = 0.775 nm and β = 109.67 °.^[2] It is insoluble in ethanol and acetone and sparingly soluble in water. It forms the nonahydrate Nd₂(WO₄)₃·9H₂O.

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