AM_Labradorite_4 Formula: Ca.32 Na.18 Si1.184 Al.814 O4 Name: Labradorite Unit cell: 8.151 12.829 7.103 93.62 116.21 89.7 , V=664.84 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, Verzasca x-ray, feldspar