AM_Colemanite
Formula: Ca.94 B3 O8 H5
Name: Colemanite
Unit cell: 8.712 11.247 6.091 90.0 110.12 90.0 , V=560.40
Space group: P121/A1 (14)

Burns P C , Hawthorne F C , The Canadian Mineralogist , 31 (1993) p.297-304, Hydrogen bonding in colemanite: An X-ray and structure-energy study