EVOLUTION OF NICKEL-OXYGEN FRAMEWORK'S DIMENSIONALITY IN SOME NICKEL (II)-ORTHOPHOSPHATES

Abstract

SrNiZn(PO₄)₂ is isostructural to SrNi₂(PO₄)₂ [P-1, Z=2, a=5.4560 (10), b=6.7110 (10), c=9.1820 (10), α=110.600 (10), β=101.100 (10), γ=98.080 (10), 1009 independent reflexions (I>2σ(I)), 119 parameters, R1=6.98, wR=7.03], with sheets made of edge-sharing [NiO₆] and [ZnO₅]. However in the new compound, Ni form dimers [Ni₂O₁₀] with short d_Ni-Ni of 3.006 Å.