Alloys of thorium with certain transition metals IV. The systems thorium-iron and thorium-cobalt

The crystal structure of Th2Co7

“…It is possible, however, that the relative amounts of the phases present in the sample depend on the corresponding nucleation or growth rates, which in turn may be strongly influenced by the nature of the primary phase separating from the melt. For high Co concentrations this is clearly the phase ThCo5 (Thomson, 1966) but a decrease of the Co concentration employed leads eventually to a suppression of ThCo5 as the primary crystals separating from the melt. Instead of assuming a random mixture of both.…”

“…From a study of the thorium--cobalt system over the whole range of composition Thomson (1966) concluded that the phase formerly designated as ThCo2-3 occurs actually at 76 + 1 at. % cobalt, which is close to ThCo3.…”

Re-entrant ferromagnetism in the ThFe3−Al system

“…All RFe 3 compounds with R = rare-earth, Y or Th crystallize in the rhombohedral Be3Nb-smacmre [1], (space group R3m, also called PuNi3-smacture) which has three inequivalent Fe-sites and two inequivalent R-sites. The Fe-Fe distances are much smaller than the Fe-R distances.…”

Thermodynamic assessment of the Co–Th and Fe–Th systems

“…However, this eutectic temperature needs to be determined by experiments in future. The calculated compositions and temperatures for the invariant reactions compared with the selected experimental data [5,6] are listed in Table 2. And a complete set of the thermodynamic parameters describing the Gibbs free energy of each phase in this system is given in Table 3.…”