AM_Preobrazhenskite
Formula: Mg3 B11 H9 O24
Name: Preobrazhenskite
Unit cell: 16.291 9.181 10.571 90.0 90.0 90.0 , V=1581.08
Space group: PBCN (60)

Burns P C , Hawthorne F C , The Canadian Mineralogist , 32 (1994) p.387-396, Structure and hydrogen bonding in preobrazhenskite, a complex heteropolyhedral, borate