Citation: Griffen, D. T.; Johnson, B. T. (1984). Strain in triclinic alkali feldspars: a crystal structure study intermediate. American Mineralogist, 69, pp. 1072-1077.
Formula: Al K0.89 Na0.11 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: