Citation: Mazzi, F.; Ungaretti, L.; Dal Negro, A.; Petersen, O. V.; Ronsbo, J. G. (1979). The crystal structure of semenovite. American Mineralogist, 64, pp. 202-210.
Formula: Be3 Ca1.3 Ce F2 Fe0.25 H2 Mn0.25 Na3.4 O22 Si7
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: Be24 Ca8 Ce8 F8 Fe4 Mn4 Na16 O88 Si40 (Be6 Ca2 Ce2 F2 Fe Mn Na4 O22 Si10)
Multiplicity: 1