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- W2017371330 abstract "Abstract The enthalpies of solution in 1.000 N HCl of Eu, Gd, and Lu oxychlorides (both powder and single crystal samples) were measured on the 50–1150 μg scale, and their standard enthalpies of formation at 298 K calculated. The lanthanide oxychlorides (LnOCl) were prepared from the corresponding sesquioxides by treatment with gaseous HCl. Single crystals were grown from a 1:10 (Eu, Gd) or 1:1 (Lu) mixture of sesquioxide-in-trichloride flux. Prior estimations of the standard enthalpies of formation for these three oxychlorides were made, based upon the thermodynamic systematics of LnCl 3 and LnOCl as a function of Ln(III) ionic radius. Standard formation enthalpies at 298 K determined in this work are: Δ f H 0 (EuOCl (cr) )=−903.5±3 kJ mol −1 ; Δ f H 0 (GdOCl (cr) )=−981.4±3 kJ mol −1 ; and Δ f H 0 (LuOCl (cr) )=−987.2±4 kJ mol −1 . These results are in accord with the estimations made. In addition, the standard enthalpy of formation of promethium oxychloride, Δ f H 0 (PmOCl (cr) ), which is unknown and difficult to obtain experimentally, was estimated on the basis of interpolation within the lanthanide systematics to be −997±4 kJ mol −1 ." @default.
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- W2017371330 date "1998-01-01" @default.
- W2017371330 modified "2023-09-27" @default.
- W2017371330 title "Standard enthalpies of formation for europium, gadolinium, and lutetium oxychlorides, calculated from measured enthalpies of solution" @default.
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- W2017371330 doi "https://doi.org/10.1016/s0925-8388(97)00435-0" @default.
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