AM_Whitlockite_1 Formula: (Mg.571 Fe.429) Ca9.181 P7 O28 H.693 Name: Whitlockite Unit cell: 10.3612 10.3612 37.096 90.0 90.0 120.0 , V=3448.88 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: Palermo Mine, North Groton, Grafton County, New Hampshire