AM_Armalcolite Formula: Fe.5 Mg.5 Ti1.999 O5 Name: Armalcolite Unit cell: 9.7762 10.0341 3.7504 90.0 90.0 90.0 , V=367.90 Space group: BBMM (63)

Wechsler B A , American Mineralogist , 62 (1977) p.913-920, Cation distribution and high-temperature crystal chemistry of armalcolite, sample Arm-E, T = 24 deg C, before annealing