AM_Feldspar_21 Formula: Sr (Al1.9 Si2.1) O8 Name: Feldspar Unit cell: 8.379 12.963 14.245 90.0 115.46 90.0 , V=1396.99 Space group: I12/C1 (15)

Benna P , Bruno E , American Mineralogist , 86 (2001) p.690-696, Single-crystal in situ high-temperature structural investigation, on strontium feldspar, Sample T = 20 deg C