AM_Leucophanite
Formula: Ca Na Be Si2 O6 F
Name: Leucophanite
Unit cell: 7.401 7.412 9.99 90.0 90.0 90.0 , V=548.01
Space group: P212121 (19)

Grice J D , Hawthorne F C , The Canadian Mineralogist , 27 (1989) p.193-197, Refinement of the crystal structure of leucophanite