Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

METHODS FOR DETERMINING SMALL AMOUNTS OF NIOBIUM AND TANTALUM IN ORES (in Russian)

Journal Article · · Zavodskaya Lab.
OSTI ID:4165986
;
Several current colorimetric methods for determining Nb and Ta were evaluated by comparing the results obtained from analyzing artificial mixtures and minerals, such as loparite, tantalite-columbite, perovskite, pyrochlore, cassiterite-tantalite and Ti-bearing minerals such as sphene. A modification of the thiosulfate method had a sensitivity of 0.05% Nb and was found useful when the sample contained less than 1% Ti. The dimethyl fluorene method for Ta was sensitive to 0.002% and could be used only if most of the Ti was previously removed from the sample. The pyrogallol extraction method, based on the extraction of complex Ta fluoride wtth cyclohexane, presented a sensitivity of 0.01% of Ta, similar to the pyrogallol-tannin method used for both elements. If their concentration is smaller, the samples must be analyzed subsequently according to the first two methods. The absorption method allows a determination of the two elements without separating them, if their concentration is higher than 0.5%, although the individual sensitivity of the method is 0.05% for Ta and 0.005% for Nb. (TTT)
Research Organization:
All-Union Geological Inst., USSR
NSA Number:
NSA-14-019213
OSTI ID:
4165986
Journal Information:
Zavodskaya Lab., Journal Name: Zavodskaya Lab. Vol. Vol: 26
Country of Publication:
Country unknown/Code not available
Language:
Russian

Similar Records

THE DETERMINATION OF TANTALUM AND NIOBIUM IN HIGH-GRADE MINERALS AND ORES
Journal Article · Thu Jan 31 23:00:00 EST 1963 · Analyst · OSTI ID:4734531
CHEMICAL METHODS FOR THE DETERMINATION OF INDIUM, GERMANIUM, BERYLLIUM, NIOBIUM, AND TANTALUM
Journal Article · Mon Dec 31 23:00:00 EST 1956 · Trudy Vsesoyuz. Magadansk. Nauch.-Issledovatel. Ministerstva Tsvet. Met. S.S.S.R. Div. · OSTI ID:4215947
Behavior of traces of refractory minerals (including monazite) in the lithium metaborate fusion
Conference · Fri Dec 31 23:00:00 EST 1982 · OSTI ID:5549765

Related Subjects

ABSORPTION
CALCIUM OXIDES
CASSITERITE
COLOR
COLUMBITE
CYCLOALKANES
DISTRIBUTION
GEOLOGY, MINERALOGY, AND METEOROLOGY
HEXANE
LOPARITE
MEASURED VALUES
MINERALS
MIXING
NIOBIUM
NIOBIUM OXIDES
ORES
PEROVSKITE
PHENOLS
PYROCHLORE
PYROGALLOL
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
RARE EARTHS
REAGENTS
SENSITIVITY
SOLVENT EXTRACTION
SPHERES
STANDARDS
SULFATES
TANTALITE
TANTALUM
TANTALUM FLUORIDES
TANTALUM OXIDES
TIN OXIDES
TITANATES
TITANIUM
TITANIUM OXIDES
URANIUM MINERALS