Citation: Ferraris, G.; Prencipe, M.; Rossi, P. (1998). Stoppaniite, a new member of the beryl group: crystal structure and crystal-chemical implications. European Journal of Mineralogy, 10, pp. 491-496.
Formula: Al0.42 Be3 Fe1.22 H2 Mg0.36 Na0.55 O19 Si6
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Al4 Be18 Fe4 Mg4 O36 Si18 (Al2 Be9 Fe2 Mg2 O18 Si9)
Multiplicity: 1