AM_Phase-B Formula: Si4 Mg12 O21 H2 Name: Phase-B Unit cell: 10.588 14.097 10.073 90.0 104.1 90.0 , V=1458.19 Space group: P121/C1 (14)

Finger L W , Hazen R M , Prewitt C T , American Mineralogist , 76 (1991) p.1-7, Crystal structures of Mg12Si4O19(OH)2 (phase B) and Mg14Si5O24 (phase AnhB)