Observations on the rare earths : yttrium chloride and the atomic weight of yttrium . -23- U + 24 - dteight of oxide ).{ + Weight of chloride TA3LE III Y203 : 2YC13 n — i pi — OC Aft No. Weight of Weight of Atomio Weight Oxide Chloride 3 .72180 92 4 .80392 90,10 •J 700*50 X . auoxu 6 .73030 755 -24- SUHrARY. Rare earth mixtures from Gadolinite and Xenotime were fraotionated byvariouR methods. The efficiency of the chromate method, as aprlied to vari-ous fractions from the bromate method, was studied. It was found to be arather rapid method for preparation
Observations on the rare earths : yttrium chloride and the atomic weight of yttrium . -23- U + 24 - dteight of oxide ).{ + Weight of chloride TA3LE III Y203 : 2YC13 n — i pi — OC Aft No. Weight of Weight of Atomio Weight Oxide Chloride 3 .72180 92 4 .80392 90,10 •J 700*50 X . auoxu 6 .73030 755 -24- SUHrARY. Rare earth mixtures from Gadolinite and Xenotime were fraotionated byvariouR methods. The efficiency of the chromate method, as aprlied to vari-ous fractions from the bromate method, was studied. It was found to be arather rapid method for preparation of small quantities of^good yttria frommixtures containing erbium,holmium, etc, in small amounts, but not suited tofractionation of earth mixtures containing didymium or gadolinium unless theyare first removed by the potassium sulphate method. The determination of the ratio Y2O3 : Y2(S04.)3 as a means of finding theatomic weight of yttrium was studied and found to be rather unoertain. Themethod aprarently gives atomio weight values which are lower than those gain-ed by other more reliable methods. The ratio Ya03 : 2YC13 waR studied and some very consistent results wereobtained. Weighed quantities of yttrium oxide were converted to anhydrousyttrium chloride in a quarts flask, and weighed. Three values varying an
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
