Citation: Phillips, M. W.; Ribbe, P. H. (1973). The structures of monoclinic potassium-rich feldspars. American Mineralogist, 58, pp. 263-270.
Formula: Al K0.85 Na0.15 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: