data [28,29,68,69], Table 1. Using the predicted volume, we estimated
the theoretical density (r) of h-carbides.
Similar to volume, the density varies monotonically with the atomic number of M and its maximum corresponds to rather Co3W3C (r ~ 14600 kg/m3) than to Fe3W3C.
All h-carbides are lighter than hexagonal WC (r ¼ 15395 kg/m3 [12]), Table 1