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  • Terbium is a metallic chemical element which is classified in the rare earth elements, also known as lanthanides, of the periodic table of elements.

  • China is the source of much of the world's terbium. Like other rare earth elements, terbium is comparatively well distributed across the Earth, but it is not widely used; most consumers do not interact with terbium, although they may own some products with terbium components.

  •  It is not found in a pure form in nature, but it can be recovered from an assortment of minerals.
    Terbium is isolated, it is silvery gray and relatively soft and easy to work.

  • On the periodic table of elements, terbium is identified with the symbol Tb, and its atomic number is 65. The element also has a number of isotopes and salts which are used in various applications.
    The element has a crystalline structure, and at least two allotropic forms, meaning the structure of the element can vary when it is in a solid state, depending on the circumstances.

  • It is used in X-ray machines as well as a green phosphor activator in color television tubes. It is also used along with the element zirconium and works as a crystal stabilizer in fuel cells that are supposed to work at high temperatures. Terbium green phosphor is used in combination with divalent europium blue phosphors and trivalent europium red phosphors. This helps in creation of 'trichromatic' lighting technology that has a higher light output compared to incandescent lighting.

  • It is also used in alloys, electronic devices and magneto mechanical devices.

  • A terbium-iron alloy is used to provide metallic films for magneto-optic recording of data.

  • The most common uses include as a laser material that emits coherent light at 5460. It is also used as a dopant for calcium fluoride, calcium tungstate and strontium molybdate that are used in solid state devices. It is also used as a probe in biochemistry as it resembles calcium in behavior. It gives out fluorescence that helps in tracking the element in biochemical experiments.

  • Terbium is used as a Dopant in calcium fluoride, calcium tungstate and strontium molybdate, materials that are used in solid-state devices, and as a crystal stabilizer of fuel cells which operate at elevated temperatures, together with ZrO2.

  • Terbium oxide is used in green phosphors in fluorescent lamps and color TV tubes. Sodium terbium borate is used in solid state devices. The brilliant fluorescence allows terbium to be used as a probe in biochemistry. The brilliant fluorescence allows terbium to be used as a probe in biochemistry.

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