The total vapor pressures of the erbium trihalides ErCl3, ErBr3, and ErI3 were measured by the torsion method, and their temperature dependences can be expressed by the following equations over the given temperature ranges: ErCl3(s), log(p/kPa) = 12.04 1 0.15 - (15159 1 200)(K/T) from (880 to 1040) K; ErBr3(s), log(p/kPa) = 11.09 1 0.15 - (14256 1 200)(K/T) from (919 to 1058) K; ErI3(s), log(p/kPa) = 11.55 1 0.15 - (13862 1 200)(K/T) from (871 to 1082) K. Treating the results by second- and third-law methods, the standard sublimation enthalpies were determined to be subH(298 K) = {(308 1 4) kJ7mol-1 and (293 1 4) kJ7mol-1} for ErCl3 and ErBr3, respectively. For ErI3 the proposed enthalpy, subH(298 K) = (282 1 6) kJ7mol-1, was only derived by the second-law method. From this standard enthalpy a set of free energy functions for solid ErI3 was evaluated by third-law treatment of the data.
Compounds
#
Formula
Name
1
Cl3Er
erbium trichloride
2
Br3Er
erbium bromide (ErBr3)
3
ErI3
erbium iodide
Datasets
The table above is generated from the ThermoML associated json file (link above).
POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied;
the numbers refer to the table of compounds on the left.