AM_Labradorite_2 Formula: Ca.317 Na.183 Si1.174 Al.824 O4 Name: Labradorite Unit cell: 8.1747 12.8706 7.1014 93.461 116.086 90.514 , V=669.30 Space group: C-1 (2)

Wenk H R , Joswig W , Tagai T , Korekawa M , Smith B K , American Mineralogist , 65 (1980) p.81-95, The average structure of An 62-66 labradorite, Lake County x-ray, feldspar