Gillespite_7 Formula: Ba Fe Si4 O10 Name: Gillespite Unit cell: 7.445 7.224 7.783 90.0 90.0 90.0 , V=418.59 Space group: P21212 (18)
Hazen R M , Finger L W , American Mineralogist , 68 (1983) p.595-603, High-pressure and high-temperature crystallographic study of the gillespite I-II, phase transition, P = 45 kbar