Citation: Simmons, W. B.; Peacor, D. R. (1972). Refinement of the crystal structure of a volcanic nepheline. American Mineralogist, 57, pp. 1711-1719.
Formula: Al3.6 K Na3 O15.999 Si4.4
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 O36 Si16 (Al4 O9 Si4)
Multiplicity: 1