Citation: Aurisicchio, C.; Fioravanti, G.; Grubessi, O.; Zanazzi, P. F. (1988). Reappraisal of the crystal chemistry of beryl Sample: S2. American Mineralogist, 73, pp. 826-837.
Formula: Al2.008 Be2.97 Cr0.052 Na0.024 O18 Si5.97
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al22 Be6 Cr4 O36 Si12 (Al11 Be3 Cr2 O18 Si6)
Multiplicity: 1