AM_Clarkeite
Formula: U Na O4
Name: Clarkeite
Unit cell: 3.954 3.954 17.66 90.0 90.0 120.0 , V=239.11
Space group: R-3M (166)

Finch R J , Ewing R C , American Mineralogist , 82 (1997) p.607-619, Clarkeite: New chemical and structural data