AM_Carletonite Formula: Si7.748 Al.112 Ca3.76 K.882 Na3.658 C4 O31.373 F.41 H4.59 Name: Carletonite Unit cell: 13.178 13.178 16.695 90.0 90.0 90.0 , V=2899.25 Space group: P4/MBM (127)

Chao G Y , American Mineralogist , 57 (1972) p.765-778, The crystal structure of carletonite, KNa4Ca4Si8O18(CO3)4(F,OH).H2O,, a double-sheet silicate