Gillespite_4 Formula: Ba Fe Si4 O10 Name: Gillespite Unit cell: 7.5161 7.516 16.0759 90.0 90.0 90.0 , V=908.14 Space group: P4/NCC (130)
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 = 1 bar