Formation energy of heterovalent alloys

Heats of formation are calculated for heterovalent alloys represented by a jellium model as previously described by the authors (see ibid., vol.5, p.1502, 1975). A much wider range of systems is considered than in the previous work and an attempt is made to identify the parameters governing alloy heats of formation. These parameters are compared with those of a recent empirical scheme. The factors determining the charge transfer are also considered.