AM_Hurlbutite Formula: Ca P2 Be2 O8 Name: Hurlbutite Unit cell: 8.299 8.782 7.798 90.0 90.5 90.0 , V=568.31 Space group: P121/A1 (14)

Lindbloom J T , Gibbs G V , Ribbe P H , American Mineralogist , 59 (1974) p.1267-1271, The crystal structure of hurlbutite: A comparison with danburite and anorthite