AM_Whitlockite_10 Formula: Ca9.5 Mg P7 O28 Name: Whitlockite Unit cell: 10.337 10.337 37.068 90.0 90.0 120.0 , V=3430.20 Space group: R3C (161)

Schroeder L W , Dickens B , Brown W E , Journal of Solid State Chemistry , 22 (1977) p.253-262, Crystallographic studies of the role of Mg as a stabilizing impurity in, beta-Ca3(PO4)2. II. Refinement of Mg-containing beta-Ca3(PO4)2, Locality: synthetic, Sample: x = 0.29 Mg