Three single crystals, prepared from aluminium melts to have various [B]/[La] ratios, were investigated using X-ray diffractometry. The final agreement indices were 1.36, 1.10 and 1.15%. Vacancies at the boron position were indicated, although not conclusively identified, for all three crystals. The thermal vibrations of lanthanum were larger than those of boron, and were found to be anisotropic with small inter-octahedral and larger intra-octahedral vibrations.

The Structure of High-Temperature Solution-Grown LaB6: a Single-Crystal Diffractometry Study. Korsukova, M.M., Gurin, V.N., Lundström, T., Tergenius, L.E.: Journal of the Less-Common Metals, 1986, 117[1-2], 73-81