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Updated: May 27, 2026

Production, Crystallization and Structure Determination of C. difficile PPEP-1 via Microseeding and Zinc-SAD
Published on: December 30, 2016
LaZn(12.37 (1)), a zinc-deficient variant of the NaZn(13) structure type
Abstract:
The title compound (lanthanum dodecazinc), LaZn(12.37 (1)), is confirmed to be a nonstoichiometric (zinc-deficient) modification of the NaZn(13) structure type, in which one Zn atom (Wyckoff site 8b, site symmetry m[Formula: see text]) has a fractional site occupancy of 0.372 (11). The other Zn atom (96i, m) and the La atom (8a, 432) are fully occupied. The coordination polyhedra of the Zn atoms are distorted icosa-hedra, whereas the La atoms are surrounded by 24 Zn atoms, forming pseudo-Frank-Kasper polyhedra. Electronic structure calculations indicate that Zn-Zn bonding is much stronger than La-Zn bonding.
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