Citation: Brown, G. E.; Mills, B. A. (1986). High-temperature structure and crystal chemistry of hydrous alkali-rich beryl from the Harding pegmatite, Taos County, New Mexico Sample: T = 500 deg C. American Mineralogist, 71, pp. 547-556.
Formula: Al2.15 Be2.58 Ca0.02 Cs0.09 Fe0.01 H2 K0.05 Li0.39 Mg0.02 Na0.21 O18.55 Si5.88
List type: interleaving
List: 1-3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al22 Be6 Li6 O36 Si12 (Al11 Be3 Li3 O18 Si6)
Multiplicity: 1
Basis: (0;0;1)
Dimensionality: 1
Formula: Ca2 Cs2 Fe2 K2 Mg2 Na2 O2 (Ca Cs Fe K Mg Na O)