Yttrium trihalides

The preparations of rare-earth trihalides can be found in various books (2-8) and in Taylor s review (2 ). This review, however, did not include the preparation of scandium and yttrium trihalides, and only covered the preparation of the trifluorides very briefly. We have reviewed the preparation of all the trihalides (including scandium and yttrium) from Taylor s review up to June 1979 and have also included some methods and references missed by Taylor. Although we have mentioned all the methods available for the preparation of the trihalides, emphasis has been placed on the methods used since Taylor s review, and these have been referenced fully, whereas for the other methods, Taylor s review is recommended as a source of references. 

Lanthanide, yttrium and scandium trihalides preparation of anhydrous materials and solution thermochemistry. J. Burgess and J. Kijowski, Adv. Inorg. Chem. Radiochem., 1981, 24, 57-114, (320). 

LANTHANIDE, YTTRIUM, AND SCANDIUM TRIHALIDES PREPARATION OF ANHYDROUS MATERIALS AND SOLUTION THERMOCHEMISTRY... 

The primary aim of this review is to collect together information on the solution thermochemistry of the trihalides of the lanthanides,1 yttrium, and scandium. There is a meager amount of published work relating to nonaqueous solvents, rather more relating to aqueous solu-... 

Hproblems associated with all the trihalides of this review of the presence of small amounts of hydrates or oxochlorides. While on the matter of possible impurities, it may be recalled that in Bommer and Hohmann s early work there is a discrepancy between enthalpies of solution of anhydrous trichlorides and of respective metals in hydrochloric acid. Here the more likely impurity to be responsible is unreacted potassium metal in the lanthanide metal used in the hydrochloric acid dissolution experiments. 

Lanthanide, Yttrium, and Scandium Trihalides Preparation of Anhydrous Materials and Solution Thermochemistry... 

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