AM_Bytownite Formula: Ca.43 Na.07 (Al.92 Si1.08) O4 Name: Bytownite Unit cell: 8.183 12.883 14.186 93.38 115.87 90.82 , V=1341.96 Space group: I-1 (2)

Facchinelli A , Bruno E , Chiari G , Acta Crystallographica, Section B , 35 (1979) p.34-42, The structure of bytownite quenched from 1723 K, Locality: satellite dyke, Traversella stock, Sesia Lanzo zone, Western Alps, Italy, Sample: non-split model, Note: T and O anisoB s from ICSD