AM_Whitlockite_4 Formula: Ca9.036 (Mg.916 Fe.084) P7 O27.28 H.831 Name: Whitlockite Unit cell: 10.3597 10.3597 37.161 90.0 90.0 120.0 , V=3453.92 Space group: R3C (161)

Hughes J M , Jolliff B L , Rakovan J , American Mineralogist , 93 (2008) p.1300-1305, The crystal chemistry of whitlockite and merrillite and the, dehydrogenation of whitlockite to merrillite, Locality: synthetic, Note: Heated at 500 degrees C