AM_TAPP-tetragonal Mg176Fe337Y068Ge208O12 Formula: Ge2.076 Fe3.37 Y.684 Mg1.766 O12 Name: TAPP-tetragonal Mg1.76Fe3.37Y0.68Ge2.08O12 Unit cell: 6.829 6.829 18.994 90.0 90.0 90.0 , V=885.79 Space group: I-42D (122)

Levy D , Barbier J , American Mineralogist , 85 (2000) p.1053-1060, (Mg,Fe).85(Mg,Fe)4(Fe,Ge)3O12: A new tetragonal phase with its comparison, with garnet