AM_U4O9 Formula: U O2.326 Name: U4O9 Unit cell: 5.44 5.44 5.44 90.0 90.0 90.0 , V=160.99 Space group: F-43M (216)

Lauriat J P , Chevrier G , Boucherle J X , Journal of Solid State Chemistry , 80 (1989) p.80-93, Space group of U4O9 in the beta phase, Sample: F-43m refinement