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Briefly Similarity and Personality of Tantalum and niobium
Tantalum and niobium are the same family of elements,the outermost electrons are the same,and the chemical activity is basically the same.Tantalum and niobium are the core structure,lattice constant is close to their thermal conductivity,linear expansion coefficient are also very close. In addition,at any temperature or at a temperature of 100 ° C to 150 ° C, hydrochloric acid,sulfuric acid,nitric acid,phosphoric acid and organic acids can not attack tantalum and niobium at any concentration.In the aqua regia due to the formation of protective oxide film,it also has corrosion resistance.But tantalum and niobium are soluble in hydrofluoric acid solution.
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