The LaF3 structure
Bonding is ionic with lanthanum highly coordinated. The cation sits at the center of a trigonal prism. Nine fluorides are close: three at the bottom corners of the trigonal prism, three in the faces of the trigonal prism, and three at top corners of the trigonal prism. There are also two fluorides a little further away above and below the prism. The cation can be considered 9-coordinate or 11-coordinate.
- A. Zalkin and D. H. Templeton: Refinement of the trigonal crystal structure of lanthanum trifluoride with neutron diffraction data. In: Acta Cryst. (1985). B41, 91-93
- Cotton, Simon; Lanthanide and Actinide Chemistry; 2007; pages 25-27
- Harrington, James A. "Infrared Fiber Optics" (PDF). Rutgers University.
- Sobolev, Boris Petrovich; The Rare Earth Trifluorides: The high temperature chemistry of the rare earth trifluorides; Institut d'Estudis Catalans (2000)
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