Strontium dicobalt orthophosphate

Abstract

In crystalline SrCo2(PO4)2; triclinicP¯1,Mr=395.4,a=5.014(2),b=8.639(4),c=9.691(1)A,a=118.04(3),β=75.09(4), γ=86.90(4)°,V=350.4(3)A3,Z=2,Dcalc=3.747 g cm−3, λMoKα=0.71069 A,μ=12.49 mm−1,F(000)=372,T=298 K,R=4.1% for 1190 obs. reflections; Co2+ and PO43− ions are found on planes parallel to (001). Co2+ occupies sites of four- and five-(trigonal bipyramidal) coordination with average Co-O distances, 1.948(8) and 2.087(8) A, respectively. The blue color of solid is due to the tetrahedral coordination geometry of the four-coordinate copper atoms.