AM_Hydroxylapatite_3 Formula: Ca5 P3 O13 H2 Name: Hydroxylapatite Unit cell: 9.4394 9.4394 6.8861 90.0 90.0 120.0 , V=531.36 Space group: P63/M (176)

Wilson R M , Elliot J C , Dowker S E P , American Mineralogist , 84 (1999) p.1406-1414, Rietveld refinement of the crystallographic structure of human dental, enamel apatites, Sample: H6G, synthetic