BaSi4O9 Formula: Ba Si4 O9 Name: BaSi4O9 Unit cell: 11.2469 11.2469 4.4851 90.0 90.0 120.0 , V=491.32 Space group: P113 (1)
Hazen R M , Yang H , Finger L W , Fursenko B A , American Mineralogist , 84 (1999) p.987-989, Crystal chemistry of high-pressure BaSi4O9 in the trigonal (P3) barium, tetragermanate structure