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Figure 13
Crystal structure of the modulated [CaLa]2[Ga]2[Ga2O7]2 melilite. Ca and La cations are shown as brown spheres and Ga cations (light green) are situated in yellow oxygen tetrahedra. Note the variable number (6–8) of (Ca, La)–O bonds in the distorted pentagonal tunnels. The figure is drawn using the crystallographic data from Wei et al. (2012BB157).

IUCrJ
Volume 2| Part 1| January 2015| Pages 137-154
ISSN: 2052-2525
doi:10.1107/S2052252514023550