Citation: Wenk, H. R.; Joswig, W.; Tagai, T.; Korekawa, M.; Smith, B. K. (1980). The average structure of An 62-66 labradorite Sissone x-ray feldspar. American Mineralogist, 65, pp. 81-95.
Formula: Al0.83 Ca0.34 Na0.15 O4 Si1.17
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 O32 Si16 (Al O2 Si)
Multiplicity: 1
Coordination sequences: