Acta Cryst. (2002). E58, i6-i8  [ doi:10.1107/S1600536801021109 ]

Tetraammonium hexahydrogen hexamolybdonickelate(II) tetrahydrate, (NH₄)₄[H₆NiMo₆O₂₄]·4H₂O

U. Lee, H.-C. Joo and J.-S. Kwon

Abstract: Crystals of the title compound, (NH₄)₄[H₆NiMo₆O₂₄]·4H₂O containing the well known B-type Anderson-Evans heteropolyoxometalate, were obtained by recrystallization of powder (NH₄)₄[H₆NiMo₆O₂₄]·nH₂O. The anion has the Ni atom at an inversion center and has close to m symmetry, with Ni-O bond lengths in the range 2.046  (5)-2.052  (6), Mo-O bond lengths in the ranges 1.701  (6)-1.720  (6), 1.932  (6)-1.954  (7) and 2.216  (6)-2.258  (5)  Å.

Online 14 December 2001

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