AM_Feldspar_4 Formula: Pb.5 Si2 Al2 O8 Name: Feldspar Unit cell: 8.388 13.067 14.327 90.0 115.19 90.0 , V=1420.99 Space group: I12/C1 (15)

Benna P , Tribaudino M , Bruno E , American Mineralogist , 81 (1996) p.1337-1343, The structure of ordered and disordered lead feldspar (PbAl2Si2O8), Sample: ordered