21 Facts About Caesium


Caesium is a chemical element with the symbol Cs and atomic number 55.

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Caesium has physical and chemical properties similar to those of rubidium and potassium.

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Caesium fluoride is a hygroscopic white solid that is widely used in organofluorine chemistry as a source of fluoride anions.

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Caesium fluoride has the halite structure, which means that the Cs and F pack in a cubic closest packed array as do Na and Cl in sodium chloride.

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Caesium is then extracted from pollucite primarily by three methods: acid digestion, alkaline decomposition, and direct reduction.

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Caesium was the first element to be discovered with a spectroscope, which had been invented by Bunsen and Kirchhoff only a year previously.

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Caesium was not recognized as a high-performance industrial metal until the 1950s.

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Caesium is used as a source of positive ions in secondary ion mass spectrometry .

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Caesium-based atomic clocks use the electromagnetic transitions in the hyperfine structure of caesium-133 atoms as a reference point.

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Caesium clocks regulate the timing of cell phone networks and the Internet.

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Caesium is important for its photoemissive properties, converting light to electron flow.

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Caesium fluoride enjoys a niche use in organic chemistry as a base and as an anhydrous source of fluoride ion.

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Caesium has been used in thermoluminescent radiation dosimetry : When exposed to radiation, it acquires crystal defects that, when heated, revert with emission of light proportionate to the received dose.

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Caesium-137 is a radioisotope commonly used as a gamma-emitter in industrial applications.

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Caesium-137 has been employed in a variety of industrial measurement gauges, including moisture, density, levelling, and thickness gauges.

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Caesium-137 has been used in hydrologic studies analogous to those with tritium.

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Caesium nitrate is used as an oxidizer and pyrotechnic colorant to burn silicon in infrared flares, such as the LUU-19 flare, because it emits much of its light in the near infrared spectrum.

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Caesium metal has been considered as the working fluid in high-temperature Rankine cycle turboelectric generators.

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Caesium salts have been evaluated as antishock reagents following the administration of arsenical drugs.

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Caesium metal is one of the most reactive elements and is highly explosive in the presence of water.

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Caesium hydroxide is a very strong base, and will rapidly corrode glass.

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