AM_Billietite Formula: U6 Ba O23 Name: Billietite Unit cell: 12.072 30.167 7.1455 90.0 90.0 90.0 , V=2602.22 Space group: PBN21 (33)

Pagoaga M K , Appleman D E , Stewart J M , American Mineralogist , 72 (1987) p.1230-1238, Crystal structures and crystal chemistry of the uranyl oxide hydrates, becquerelite, billietite, and protasite, Note: y-coordinate of O601u atom changed to make calculated bond lengths, match those published, Locality: Shinkolobwe mine, Shaba, Zaire