Citation: Finger, L. W.; Conrad, P. G. (2000). The crystal structure of "Tetragonal Almandine-Pyrope Phase" (TAPP): A reexamination. American Mineralogist, 85, pp. 1804-1807.
Formula: Al1.942 Fe0.49 Mg2.658 O12 Si2.91
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 Fe20 Mg12 O48 Si12 (Al4 Fe5 Mg3 O12 Si3)
Multiplicity: 1