The Debye temperature at ambient temperatures was determined using single crystal X-ray diffraction data. The value of the Debye temperature was 491K. The rigid three-dimensional boron network was associated with a θD value of 732K and the ion lattice with 417K.

The X-Ray Debye Temperature of LaB6. Korsukova, M.M., Lundström, T., Tergenius, L.E., Gurin, V.N.: Solid State Communications, 1987, 63[3], 187-9