AM_Orientite Formula: Mn3 Ca2 Si2.5 O14 H4 Name: Orientite Unit cell: 9.074 19.13 6.121 90.0 90.0 90.0 , V=1062.52 Space group: BBMM (63)

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