Citation: Harlow, G. E. (1982). The anorthoclase structures: The effects of temperature and composition Grande Caldeira, Or = 32.5, T = 400 deg C feldspar. American Mineralogist, 67, pp. 975-996.
Formula: Al K0.333 Na0.667 O8 Si3
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: