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Neodymium is a lustrous silvery-yellow metal. It is very reactive and quickly tarnishes in air and the coated formed does not protect the metal from further oxidation, so it must be stored away from contact with air. It reacts slowly with cold water and rapidly with hot.
Neodymium is one of the rare chemicals that can be found in houses in equipment such as colour televisions, fluorescent lamps, energy-saving lamps and glasses. All rare chemicals have comparable properties. Neodymium is one of the several metals in alloys commonly used in lighter flints. The most important alloys is neodymium, iron and boron (NIB), found to make excellent permanent magnets. These magnets are part of modern vehicles components, used in computer data storing and in loudspeakers. Neodymium is used in colouring glasses (didymium glass) able to adsorb the yellow sodium glare of the flame. This kind of glass is used to protect the eyes of welders. It is also used to tint glass attractive shades of purple.