AM_Apatite-(CaOH)_23 Formula: Ca5 (As1.298 P1.702) O13 H Name: Apatite-(CaOH) Unit cell: 9.564 9.564 6.936 90.0 90.0 120.0 , V=549.44 Space group: P63/M (176)

Lee Y J , Stephens P W , Tang Y , Li W , Phillips B L , Parise J B , Reeder R J , American Mineralogist , 94 (2009) p.666-675, Arsenate substitution in hydroxylapatite: Structural characterization of the, Ca5(PxAs1-xO4)3OH solid solution, Sample: As43, Locality: synthetic