AM_Welinite Formula: Mn2.81 W.4 Mg.3 Si O7 Name: Welinite Unit cell: 8.155 8.155 4.785 90.0 90.0 120.0 , V=275.59 Space group: P63 (173)

Moore P B , Arkiv for Mineralogi och Geologi , 4 (1969) p.459-466, The crystal structure of welinite (Mn+4,W)<1(Mn+2,W,Mg)<3Si(O,OH)7