Materials Research Bulletin, Vol.29, No.12, 1307-1314, 1994
A Whitlockite-Like Calcium Copper Phosphate
A new calcium copper orthophosphate Ca10Cu(PO4)7 has been prepared and characterized. The compound is stable in the temperature range of 300-1200 K in inert atmosphere or 300-680 K in air. The compound Ca10Cu(PO4)7 is crystallized in the rhombohedral system with whitlockite-type structure. The space group is R3c, the lattice constants are : a=10.442(1), c=37.39(1)angstrom, V=3531(1)angstrom3. There are two different copper sites in the structure.