AM_BCTT_2 Formula: K2.22 (Fe2.22 Si1.78) O8 Name: BCTT Unit cell: 9.102 9.102 5.341 90.0 90.0 90.0 , V=442.48 Space group: I4MM (107)

Dollase W A , Ross C R , American Mineralogist , 78 (1993) p.627-632, Crystal structures of the body-centered tetragonal tectosilicates:, K1.14Mg0.57Si1.43O4, K1.10Zn0.55Si1.45O4, and K1.11Fe1.11Si0.89O4, Sample: Fe-rich phase