AM_Feldspar Formula: (Si2.26 Al1.74) Sr.84 Na.03 O8 Name: Feldspar Unit cell: 8.3282 12.9801 7.1358 90.0 115.599 90.0 , V=695.67 Space group: C12/M1 (12)

Grundy H D , Ito J , American Mineralogist , 59 (1974) p.1319-1326, The refinement of the crystal structure of a synthetic non-stoichiometric Sr, feldspar