AM_Calzirtite
Formula: Zr2.5 (Ti.75 Fe.1 Nb.15) Ca O8
Name: Calzirtite
Unit cell: 15.094 15.094 10.043 90.0 90.0 90.0 , V=2288.08
Space group: I41/ACD (142)

Sinclair W , Eggleton R A , McLaughlin G M , American Mineralogist , 71 (1986) p.815-818, Structure refinement of calzirtite from Jacupiranga, Brazil