12/4/2023 0 Comments Caesium sulfide![]() When both ions are similar in size (Cs + ionic radius 174 pm for this coordination number, Cl − 181 pm) the CsCl structure is adopted, when they are different (Na + ionic radius 102 pm, Cl − 181 pm) the sodium chloride structure is adopted. In contrast, the other alkaline halides have the sodium chloride (rocksalt) structure. This structure is shared with CsBr and CsI and many binary metallic alloys. The chloride atoms lie upon the lattice points at the corners of the cube, while the caesium atoms lie in the holes in the center of the cubes an alternative and exactly equivalent 'setting' has the caesium ions at the corners and the chloride ion in the center. The caesium chloride structure adopts a primitive cubic lattice with a two-atom basis, where both atoms have eightfold coordination. Spread of 137CsCl powder from a 93-gram container in 1987 in Goiânia, Brazil, resulted in one of the worst-ever radiation spill accidents killing four and directly affecting 249 people. Whereas conventional caesium chloride has a rather low toxicity to humans and animals, the radioactive form easily contaminates the environment due to the high solubility of CsCl in water. Another form of cancer treatment was studied using conventional non-radioactive CsCl. ![]() When enriched in radioisotopes, such as 137CsCl or 131CsCl, caesium chloride is used in nuclear medicine applications such as treatment of cancer and diagnosis of myocardial infarction. It is a reagent in analytical chemistry, where it is used to identify ions by the color and morphology of the precipitate. Ĭaesium chloride is widely used medicine structure in isopycnic centrifugation for separating various types of DNA. Less than 20 tonnes of CsCl is produced annually worldwide, mostly from a caesium-bearing mineral pollucite. Caesium chloride occurs naturally as impurities in carnallite (up to 0.002%), sylvite and kainite. CsCl changes to NaCl structure on heating. Its crystal structure forms a major structural type where each caesium ion is coordinated by 8 chloride ions. This colorless salt is an important source of caesium ions in a variety of niche applications. Symbols, abbreviations, or full names for units of length,Īrea, mass, pressure, and other types.Caesium chloride or cesium chloride is the inorganic compound with the formula Cs Cl. You can find metric conversion tables for SI units, as wellĪs English units, currency, and other data. Using the chemical formula of the compound and the periodic table of elements, we can add up the atomic weights and calculate molecular weight of the substance.Ĭonversion calculator for all types of measurement units. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100. If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. This site explains how to find molar mass. The reason is that the molar mass of the substance affects the conversion. To complete this calculation, you have to know what substance you are trying to convert. The formula weight is simply the weight in atomic mass units of all the atoms in a given formula.Ī common request on this site is to convert grams to moles. When calculating molecular weight of a chemical compound, it tells us how many grams are in one mole of that substance. These relative weights computed from the chemical equation are sometimes called equation weights.įinding molar mass starts with units of grams per mole (g/mol). For bulk stoichiometric calculations, we are usually determining molar mass, which may also be called standard atomic weight or average atomic mass.įormula weights are especially useful in determining the relative weights of reagents and products in a chemical reaction. This is not the same as molecular mass, which is the mass of a single molecule of well-defined isotopes. This is how to calculate molar mass (average molecular weight), which is based on isotropically weighted averages. The atomic weights used on this site come from NIST, the National Institute of Standards and Technology. In chemistry, the formula weight is a quantity computed by multiplying the atomic weight (in atomic mass units) of each element in a chemical formula by the number of atoms of that element present in the formula, then adding all of these products together. Moles Cesium Sulfide to grams, or enter other units to convert below: Enter two units to convert From: ![]() You can do the reverse unit conversion from
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