AM_Hedyphane Formula: Ca2 Pb3 As3 O12 Cl Name: Hedyphane Unit cell: 10.14 10.14 7.185 90.0 90.0 120.0 , V=639.78 Space group: P63/M (176)

Rouse R C , Dunn P J , Peacor D R , American Mineralogist , 69 (1984) p.920-927, Hedyphane from Franklin, New Jersey and Langban, Sweden: Cation ordering in an, arsenate apatite, sample H90417 from Langban, Sweden