AM_Feldspar_17
Formula: Pb.5 (Si1.42 Al.58) O4
Name: Feldspar
Unit cell: 8.402 13.043 14.308 90.0 115.3 90.0 , V=1417.58
Space group: I12/C1 (15)

Benna P , Tribaudino M , Bruno E , American Mineralogist , 84 (1999) p.120-129, High-temperature in situ structural investigation on lead feldspar, Sample at T = 20 C, split Pb atom model