Determination of Oxygen in Yttrium Fluoride by Vaccum Distillation Technique

Determination of Oxygen in Yttrium and Yttrium Fluoride by the Inert Gas Fusion Method

“…A comparison of the results on yttrium fluoride samples by the inert gas fusion, vacuum distillation (6), and the KBrF4 (3) methods (Table II) shows that the KBrF4 method gives lower results than those by the other tech-niques. These low results seemed to be a function of the sample rather than the technique-i.e., on some samples the results differed only by a few thousandths of a per cent, while on others they differed by as much as a tenth of a per cent.…”

Determination of Oxygen in Mixed Fluorides by Inert Gas Fusion.

“…The samples of fluoride electrolyte were frequently" hetero- * Free energy is expressed in calories and °K. 6 Temperatures in columns A and B were calculated on the basis of a metal oxide activity of 1 and 0.01, respectively. geneous owing to a layer formation that occurred when the molten fluoride containing excess metal oxide was cooled and solidified.…”

“…The results in Table V show that a similar accuracy was achieved for each electrolyte, and the relative error varied from 0 Values have been corrected for residual oxygen, average of 10 determinations. 6 Relative error = 100 (meanknown)/known. high affinity of La203 for water, it was necessary to prepare the lanthanum standards in a dry atmosphere.…”

“…A challenging analytical problem inherent in this research is the determination of oxygen in the fused fluoride baths, before and after the electrowinning operations. The importance and the need for an oxygen analysis method are emphasized by the research efforts of other laboratories, which have resulted in the publication during the past year of reports describing three different analytical techniques-vacuum distillation (6), high temperature fluorination with potassium bromotetrafluoride (J), and inert gas fusion (1). Apparently, any one of these techniques could be applied to the analysis of oxygen in mixed fluoride salts.…”

Ion mobilities in fused salts

“…Very rapid equilibration among the proposed ions (36) Table 2. The change of t_ with a may be calculated for Cases I, II, and III for the salts using Equation 36.…”