AM_Katoite_13 Formula: Ca3 Al2 Si3 (O12 H12) Name: Katoite Unit cell: 12.1267 12.1267 12.1267 90.0 90.0 90.0 , V=1783.31 Space group: I-43D (220)

Lager G A , Downs R T , Origlieri M J , Garoutte R , American Mineralogist , 87 (2002) p.642-647, High-pressure single-crystal X-ray diffraction study of katoite hydrogarnet:, Evidence for a phase transition from Ia-3d - I-43d symmetry at 5 GPa, Sample: P = 7.78 GPa