AM_Crandallite
Formula: Ca1.002 P2 Al3 O14
Name: Crandallite
Unit cell: 7.005 7.005 16.192 90.0 90.0 120.0 , V=688.09
Space group: R-3M (166)

Blount A M , American Mineralogist , 59 (1974) p.41-47, The crystal structure of crandallite