1925
DOI: 10.1039/an9255000485
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Investigations into the analytical chemistry of tantalum, niobium, and their mineral associates. IV. A new method for the separation of tantalum from niobium. V. The detection and determination of tantalum in niobium compounds

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Cited by 32 publications
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“…One gram of the tantalum salt dissolves in about 200 grams of water while an equal weight of the niobium compound requires only 12 parts water. Schoeller has devised a method of separating tantalum from niobium by fractionally precipitating their oxalates with tannin (78,79). Tannin precipitates the tantalum complex from a slightly acid solution while an excess of tannin precipitates niobium from a neutral solution.…”
Section: Extractionmentioning
confidence: 99%
“…One gram of the tantalum salt dissolves in about 200 grams of water while an equal weight of the niobium compound requires only 12 parts water. Schoeller has devised a method of separating tantalum from niobium by fractionally precipitating their oxalates with tannin (78,79). Tannin precipitates the tantalum complex from a slightly acid solution while an excess of tannin precipitates niobium from a neutral solution.…”
Section: Extractionmentioning
confidence: 99%