AM_Staurolite_32 Formula: O12 Si1.87 Al4.495 Fe.859 Mg.221 Li.023 Zn.02 H.75 Name: Staurolite Unit cell: 7.865 16.60899 5.656 90.0 90.028 90.0 , V=738.84 Space group: C12/M1 (12)

Hawthorne F C , Ungaretti L , Oberti R , Caucia F , Callegari A , The Canadian Mineralogist , 31 (1993) p.551-582, The crystal chemistry of staurolite. I. Crystal structure and site populations, Sample Code: PIO/13, Locality: Brazil