Strontium dicobalt orthophosphate

In crystalline SrCo2(PO4)2; triclinicP¯1,Mr=395.4,a=5.014(2),b=8.639(4),c=9.691(1)Å,a=118.04(3),ß=75.09(4), ?=86.90(4)°,V=350.4(3)Å3,Z=2,Dcalc=3.747 g cm-3, ?MoKa=0.71069 Å,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) Å, respectively. The blue color of solid is due to the tetrahedral coordination geometry of the four-coordinate copper atoms.