Observations on the rare earths : yttrium chloride and the atomic weight of yttrium . aoh and Company, Freiberg i. Saxony, fifteen kilograms of Euxenite andten kilograms of Fergusenite, also large quantities of Uonazite residues fur-nished by the Welsbaoh Company, thru the courtesy of Dr. H. S. Niner. Thematerials for the present work were obtained from the first two sources andthe procedure for Oadolinite and Xenotime only will be given. Ten kilograms of Gadolinite were pulverised in a ball mill and thentreated with an excess of concentrated hydrochloric acid with the addition ofa little nitr
Observations on the rare earths : yttrium chloride and the atomic weight of yttrium . aoh and Company, Freiberg i. Saxony, fifteen kilograms of Euxenite andten kilograms of Fergusenite, also large quantities of Uonazite residues fur-nished by the Welsbaoh Company, thru the courtesy of Dr. H. S. Niner. Thematerials for the present work were obtained from the first two sources andthe procedure for Oadolinite and Xenotime only will be given. Ten kilograms of Gadolinite were pulverised in a ball mill and thentreated with an excess of concentrated hydrochloric acid with the addition ofa little nitric acid from time to time. This was continued until decomposi-tion was complete, and finally the mass was evaporated to dryness to dehydratethe silica. The residue was-treated with water, the silioa filtered off, andthe rare earths precipitated from a slightly aoid solution with oxalic oxalates were then washed by deoantation. Experience showed that the best and most rapid way to carry out an oxalicacid precipitation was to have both solutions hot. A small quantity of the. aoid was poured into the rare earth solution without stirring, since the pre-cipitate which was in a viscous state would gather into a large ball whenstirred, which hardened and prevented thorough washing. After a few minutesthe precipitate had solidified and the solution was stirred and an excess ofoxalic acid added. A fine white precipitate was obtained which settled rapid-ly and was easily washed. The Xenotime oxalate was purchased as such from Drossbach and consisted principally of the earths of tha yttrium grour and contained buta small per oent. of the cerium earths. METHODS OF into the Cerium and Yttrium materials werp splitinto the cerium and yttrium groups roughly by converting the oxalates to theanhydrous sulphates by mixing the dry oxalates to a thick paste with concen-trated sulphuric acid and igniting till no more fumes came of f, then diss
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Keywords: ., bookcentury1900, bookdecade1910, booksubjecttheses, bookyear1912
