AM_Fontanite Formula: U3 Ca C2 O20 H12 Name: Fontanite Unit cell: 6.968 17.276 15.377 90.0 90.064 90.0 , V=1851.07 Space group: P121/N1 (14)

Hughes K-A , Burns P C , American Mineralogist , 88 (2003) p.962-966, A new uranyl carbonate sheet in the crystal structure of fontanite,, Ca[(UO2)3(CO3)2O2](H2O)6