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Rare metals and rare earths
Rare earths of a lanthanum subset, or lanthanides, are applied in production of permanent magnets, in iron and steel industry and non-ferrous metallurgy, in nuclear, electronic, chemical and other industries. |
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Non-metals
Non-metals are chemical elements that form simple elements with no
metal-specific qualities. Non-metals typically include 22 elements: gases - hydrogen,
nitrogen,
oxygen, fluor, chlorine and inert gases; liquids - bromine; solids - boron, carbon,
silicon, phosphorus,
arsenic, sulphur,
selenium, tellurium, iodine, astatine. |
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Rare and rare-earth metals |
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Selenium
Selenium is mostly used in glass industry, but, due to explosion of prices in the world lately, selenium salts start being introduced to the market. Additionally selenium is used in metallurgy, chemical and semiconductor industries, and also in ink and pharmaceutical industries.
Lanthanum
Lanthanum is a silver-white metal covered with a greyish oxide layer. Its
physical properties: a melting point is 920, a boiling point is
3469°C; lanthanum
occupies a middle position in tables as for his lasting quality, hardness, electrical
conductivity and other character features. It does not react in the dry air – an
oxide layer protects it safely from oxidation en masse.
Rare metals and rare earths
Rare earths of a lanthanum subset, or lanthanides, are applied in production of permanent magnets, in iron and steel industry and non-ferrous metallurgy, in nuclear, electronic, chemical and other industries.
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