AM_Ruizite
Formula: Mn2 Ca2 Si4 O17 H6
Name: Ruizite
Unit cell: 9.064 6.171 11.976 90.0 91.4 90.0 , V=669.66
Space group: C12/M1 (12)

Moore P B , Shen J , Araki T , American Mineralogist , 70 (1985) p.171-181, Crystal chemistry of the (M2)3+ phi2 sheet: Structural principles and crystal, structures of ruizite, macfallite and orientite