Citation: MacDonald, D.J.; Burns, P.C.; della Ventura, G.; Parodi, G.C.; Hawthorne, F.C. (1993). The crystal structure of stillwellite. Canadian Mineralogist, 31, pp. 147-152.
Formula: B Ce0.5 La0.5 O5 Si
Chemical name: (Ce0.5 La0.5) (B O (Si O4))
List type: noninterleaving
List: 3D
Basis: (1;0;0 0;1;0 0;0;1)
Dimensionality: 3
Formula: B3 Ce3 La3 O18 Si3 (B Ce La O6 Si)
Multiplicity: 1