Citation: Angel, R. J.; Carpenter, M. A.; Finger, L. W. (1990). Structural variation associated with compositional variation and order-disorder behavior in anorthite-rich feldspars sample from Monte Somma. American Mineralogist, 75, pp. 150-162.
Formula: Al Ca O4 Si
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al16 O64 Si16 (Al O4 Si)
Multiplicity: 1
Coordination sequences: