AM_U4O9_1 Formula: U O2.338 Name: U4O9 Unit cell: 5.44 5.44 5.44 90.0 90.0 90.0 , V=160.99 Space group: P-43M (215)

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: P-43m refinement