AM_Ca3(PO4)2 Formula: Ca3 P2 O8 Name: Ca3(PO4)2 Unit cell: 5.2487 5.2487 18.6735 90.0 90.0 120.0 , V=445.51 Space group: R-3M (166)

Sugiyama K , Tokonami M , Physics and Chemistry of Minerals , 15 (1987) p.125-130, Structure and crystal chemistry of a dense polymorph of, tricalcium phosphate Ca3(PO4)2: a host to accommodate, large lithophile elements in the Earth s mantle