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- Separation of tantalum from columbium by the hydrofluoric acid-sulfuric acid-methyl isobutyl ketone system
- Separating tantalum and columbium by solvent extraction :HF- HCl-Diethyl ketone system
- Columbium and tantalum:a materials survey
- Preparation of columbium and tantalum by metallic reduction of their chlorides
- X-ray spectrographic analysis for trace quantities of tantalum in columbium
- Heat of formation of tantalum carbide
- Extraction of tantalum and columbium from ores and concentrates by chlorination
- Thermodynamic data for molybdenum carbide and tantalum carbide
- Microflotation studies of some columbium-tantalum minerals