AM_TAPP-tetragonal Mg195Ca33Fe313Ge252O12 Formula: Ge2.52 Fe3.14 Ca.33 Mg1.93 O12 Name: TAPP-tetragonal Mg1.95Ca.33Fe3.13Ge2.52O12 Unit cell: 6.8217 6.8217 18.7818 90.0 90.0 90.0 , V=874.02 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