A reinvestigation of the disproportionation of zirconium triiodide

Thermodynamics of Vaporization of ZrI4 from Substoichiometric Solid Zirconium Iodides

“…Equation [6] from Bhatti et al (6) gives pressures within 25% of our results in Eq. [4]; therefore, both equations probably represent the same composition region.…”

“…We believe that our results are more accurate because the present apparatus has greater sensitivity both for pressure measurements and for composition determinations. We also believe the compositions determined by Daake and Corbett (8) are more reliable than those of Bhatti et al (6).…”

“…[4] gives the pressure of gaseous ZrI~ and Bhatti's less accurate Eq. [6] pertains. From ZrIl.~ to ZrI1.0 is a single solid phase.…”

“…Shelton and co-workers (2)(3)(4)(5)(6) have used this method with effusion mass loss measurements in studies of zirconium halide systems. In our measurements the pressure of ZrI4 was observed by a torsion-effusion method in which ZrI4 slowly escaped from the system so that the over-all composition changed with time and the change in composition was evaluated from the mass loss, which was continuously determined with a Cahn RH-10 recording microbalance.…”

“…Bhatti et al(6) recently reinvestigated parts of the Zr-I system with an effusion-gravimetric method. They found two monovariant regions.…”