![]() ![]() The final data column compares this percentage against the percentage of all minerals that contain the element listed in each row. Cesium reacts violently with water and ice, forming cesium hydroxide (CsOH). Cesium can be used in some forms of oil drilling, acting as a lubricant and maintaining pressure. Since it is easily ionized and has a high mass, cesium ions may one day be used as a propellant in ion engines on spacecraft. Cesium is the rarest of the naturally occurring alkali metals as the isotope 133Cs. Cesium melts at 28.41 C (just below body temperature) and occurs in Earth's crust at 2.6 ppm. 10 In medicine, it is used in radiation therapy. Cesium is also used in atomic clocks, in photoelectric cells and as a catalyst in the hydrogenation of certain organic compounds. It is used in the most accurate atomic clocks. Specifically, the fractional variation of Earth’s rotation period is a few hundred times larger than that. WHAT IS CESIUM-137 USED FOR Cesium-137, was used in intracavitary brachytherapy radiation therapy for the treatment of cancer, and now, as a sealed source. In small amounts, it is used to calibrate radiation-detection equipment. The latter, however, is not nearly as stable as the cesium clock. quantum mechanics - Quantum mechanics - Cesium Clock, Timekeeping, Accuracy: The cesium clock is the most accurate type of clock yet developed. The second data column lists this number as a percentage of all minerals listed with Caesium. Prior to 1967, the second was defined in terms of the motion of Earth. The first data column contains the total number of minerals listed with Caesium and the element listed for that row. It is a reagent in analytical chemistry, where it is used to identify ions by the color and morphology of the precipitate. ![]() ![]() Note that unlike other sections on this page this includes non-essential elements. Caesium chloride is widely used medicine structure in isopycnic centrifugation for separating various types of DNA. This table compares the known valid mineral species listed listed with Caesium and the other elements listed based on the official IMA formula. Minerals where Cs was previously thought to be a colouring agent probably contain other ions such as Mn#2+#.Ģ7 valid species containing essential CaesiumĬs + enters later phases in igneous rocks due to its large size.Ītom mole fraction relative to Si=1 (% uncertainty)Įlement association of Caesium in the Mineral World Wikipedia WebElements Los Alamos National Laboratory Theodore Gray's Ĭaesium as a chromophore in minerals and gemsĭoes NOT cause colour as it has no electrons in d-orbitals. ![]()
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