First-principles calculations were used to study the lattice constants, elastic constants and fundamental electronic properties at various pressures. The calculated bulk modulus and lattice constant were in agreement with previous theoretical results. The elastic constants increased with applied pressure  increasing. The material could retain its stability up to 5GPa. The valence band near the Fermi energy was dominated by the La-5d band hybridized with the B-2p state, with small contributions from the La-s, p states.

Fundamental Electronic Properties and Elastic Properties of Lanthanum Hexaboride: a Computer Aided Design. Yu, B.H., Xu, C., Chen, D.: Advanced Materials Research, 2012, 580, 461-4