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- W2073670302 abstract "A thermo-gravimetric effusion study of the disproportionation of ZrBr3, similar to, but more extensive in its effusion aspects, than that previously carried out on ZrCl3, reveals a similar type of behaviour. The lower limit of the ZrBr3 phase is reached in the first-stage disproportionation with the stoichiometry 6 ZrBr3(s) = 5 ZrBr2.8(s) + ZrBr4(g) and for which a disproportionation enthalpy of 109 ± 4 kJ is obtained in the temperature range 500–550 K. On further heating, second stage disproportionation takes place in the temperature range 600–700 K with an enthalpy change of 178 ± 10 kJ. The composition of the final residue gives a Zr:Br ratio which varies from about 1:1.4 to 1:0.8, and which appears to depend on the effusion cell pressure. It is possible that this product is a mono-bromide phase, formed with the stoichiometry 53ZrBr2.8(s) = ZrBr4(g)+23ZrBr(s). The results are compared with those previously obtained using ZrCl3 and discussed in relation to static disproportionation systems." @default.
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- W2073670302 date "1973-07-01" @default.
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- W2073670302 title "The disproportionation of zirconium tribromide" @default.
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- W2073670302 doi "https://doi.org/10.1016/0022-5088(73)90077-5" @default.
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