AM_Cappelenite-(Y)
Formula: Ba Y6 Si3 B6 O24 F2
Name: Cappelenite-(Y)
Unit cell: 10.67 10.67 4.68 90.0 90.0 120.0 , V=461.43
Space group: P113 (1)

Shen J , Moore P B , American Mineralogist , 69 (1984) p.190-195, Crystal structure of cappelenite, Ba(Y,RE)6[Si3B6O24]F2: a silicoborate, sheet structure