AM_Tetraferriannite_1 Formula: Cs.89 Fe3.92 Si3.04 Al.04 O12 Name: Tetraferriannite Unit cell: 5.444 9.439 10.185 90.0 100.2 90.0 , V=515.09 Space group: C12/M1 (12)

Comodi P , Zanazzi P F , Weiss Z , Rieder M , Drabek M , American Mineralogist , 84 (1999) p.325-332, Cs-tetra-ferri-annite: High-pressure and high-temperature behavior of a, potential nuclear waste disposal phase, T = 23 deg C, P = 39.4 kbar, crystal 1