AM_Manganhumite Formula: Mn4.9 Mg2.1 Si3 O14 H2 Name: Manganhumite Unit cell: 4.815 10.58 21.448 90.0 90.0 90.0 , V=1092.62 Space group: PBNM (62)

Francis C A , Ribbe P H , American Mineralogist , 63 (1978) p.874-877, Crystal structures of the humite minerals: V. Magnesian manganhumite