AM_Feldspar_30 Formula: (Ca.2 Sr.8) Si2 Al2 O8 Name: Feldspar Unit cell: 8.386 12.97 14.283 90.0 115.46 90.0 , V=1402.64 Space group: I12/C1 (15)

Benna P , Bruno E , American Mineralogist , 88 (2003) p.1532-1541, Single-crystal in situ high-temperature structural investigation of the I-1 - I2/c phase, transition in Ca0.2Sr0.8Al2Si2O8 feldspar, T = 620 C