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Caesium chloride
General
Other names	Cesium chloride
Molecular formula	CsCl
Molar mass	168.36 g/mol
Appearance	white solid
CAS number	[7647-17-8]
EINECS number	231-600-2
Properties
Density and phase	3.99 g/cm3, solid
Solubility in water	162 g/100 ml (1 °C)
In methanol In ethanol In acetone	33.7 g/100 ml Very soluble Insoluble
Melting point	645°C
Boiling point	1295°C
Structure
Coordination geometry	simple cubic
Crystal structure	see text
Thermodynamic data
Supplementary data page
Structure & properties	n, εr, etc.
Thermodynamic data	Phase behaviour Solid, liquid, gas
Spectral data	UV, IR, NMR, MS
Related compounds
Other anions	Caesium fluoride Caesium bromide Caesium iodide
Other cations	Potassium chloride Rubidium chloride
Except where noted otherwise, data are given for materials in their standard state (at 25°C, 100 kPa) Infobox disclaimer and references

Caesium chloride is an ionic compound best known as a structural type. Wikipedia does not have an article with this exact name. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... The EINECS number (for European Inventory of Existing Chemical Substances) is a registry number given to each chemical substance commercially available in the European Union between 1 January 1971 and 18 September 1981. ... Density (symbol: ρ - Greek: rho) is a measure of mass per unit of volume. ... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... Water has the chemical formula H2O, meaning that one molecule of water is composed of two hydrogen atoms and one oxygen atom. ... Methanol, also known as methyl alcohol or wood alcohol, is a chemical compound with chemical formula CH3OH. It is the simplest alcohol, and is a light, volatile, colourless, flammable, poisonous liquid with a very faint odor. ... Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless chemical compound, one of the alcohols that is most often found in alcoholic beverages. ... R-phrases , , , S-phrases , , , Flash point -20 °C Autoignition temperature 465 °C RTECS number AL31500000 Supplementary data page Structure & properties n, εr, etc. ... The melting point of a solid is the temperature at which it changes state from solid to liquid. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... The coordination geometry of an atom is the geometrical pattern formed by its neighbors in a molecule or a crystal. ... Rose des Sables (Sand Rose), formed of gypsum crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... Caesium chloride is an ionic compound best known as a structural type. ... The refractive index (or index of refraction) of a material is the factor by which the phase velocity of electromagnetic radiation is slowed in that material, relative to its velocity in a vacuum. ... The dielectric constant εr (represented as or K in some cases) is defined as the ratio: where εs is the static permittivity of the material in question, and ε0 is the vacuum permittivity. ... Ultraviolet-Visible Spectroscopy or Ultraviolet-Visible Spectrophotometry (UV/ VIS) involves the spectroscopy of photons (spectrophotometry). ... IR spectrum of a thin film of liquid ethanol. ... Nuclear Magnetic Resonance Spectroscopy most commonly known as NMR Spectroscopy is the name given to the technique which exploits the magnetic properties of nuclei. ... Basic schematic of mass spectrometry Mass spectrometry is an analytical technique used to measure the mass-to-charge ratio of ions. ... // An ion is an atom or a group of atoms (a chemical substance), or subatomic particle, with a net electric charge. ... Overview Caesium fluoride (cesium fluoride in North America), is an ionic compound usually found as a hygroscopic white solid. ... Caesium iodide is an ionic compound often used as the input phosphor of an x-ray image intensifier tubes found in Fluoroscopy equipment. ... // An ion is an atom or a group of atoms (a chemical substance), or subatomic particle, with a net electric charge. ... The chemical compound potassium chloride (KCl) is a metal halide composed of potassium and chlorine. ... Rubidium(I) chloride is an ionic compound. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ...

Preparation

Caesium chloride can be prepared by the reaction of caesium hydroxide or caesium carbonate with hydrochloric acid: the resulting salt is purified by recrystallization. Caesium hydroxide, (CsOH) is a chemical compound consisting of an atom of caesium and a hydroxide group (also known as hydroxyl). ... Caesium carbonate (or cesium carbonate in the US) is a white crystalline solid of formula Cs2CO3. ... The chemical compound hydrochloric acid is the aqueous (water-based) solution of hydrogen chloride (HCl) gas. ... Recrystallization is an essentially physical process that has meanings in chemistry and geology. ...

Caesium metal reacts violently with chlorine gas to give caesium chloride, although the expense of metallic caesium means that this is not the usual route of preparation. General Name, Symbol, Number caesium, Cs, 55 Chemical series alkali metals Group, Period, Block 1, 6, s Appearance silvery gold Atomic mass 132. ... General Name, Symbol, Number chlorine, Cl, 17 Chemical series halogens Group, Period, Block 17, 3, p Appearance yellowish green Atomic mass 35. ...

Crystal structure

The caesium chloride structure is composed of interlocking simple cubic lattices of anions and cations. It is the case that in a cubic 1:1 solid where one atom type is much larger than the other that the cesium chloride type lattice is obtained, it can be thought of as a combination of footballs and golf balls packed in a cubic manner with the golf balls in the gaps between the footballs. If the two atom types are similar in size (imagine hockey balls packed with tennis balls) then in the cubic lattice the structure will be like that of sodium chloride. Image File history File links Taken from German Wikipedia. ... Look up Football in Wiktionary, the free dictionary. ... Golf (gowf in Scots) is a sport where individual players or teams hit a ball into a hole using various clubs, and is one of the few ball games that does not use a fixed standard playing area. ... A golf ball on a Tee with a driver ready for a drive A golf ball is a ball designed for use in the game of golf. ... Hockey is any of a family of sports in which two teams compete by trying to maneuver a ball or hard round disc, called a puck, into the opponents net or goal, past the goaltender or goalkeeper (often abbreviated goalie), using a hockey stick. ... The Australian Rod Laver, a candidate for the greatest player of all time This article is about the sport. ... Sodium chloride, also known as common salt, table salt, or halite, is a chemical compound with the formula NaCl. ...

Uses

Caesium chloride is used in the preparation of electrically conducting glasses. ^[1] Glass can be made transparent and flat, or into other shapes and colours as shown in this ball from the Verrerie of Brehat in Brittany. ...

Radioisotopes of caesium chloride are used in nuclear medicine, including treatment of cancer. In the production of radioactive sources it is normal to choose a chemical form of the radioisotope which will not be dispersed with ease in the environment as a result of an accident where the source is smashed open. For instance radiothermal generators (RTGs) oftein use strontium titanate because it is insoluble in water. But for teletherapy sources the radioactive density (Ci in a given volume) needs to be very high, as a result it is not possible with any of the insoluble caesium compounds to create the source. As a result it is normal to use a thimble shapped can of radioactive caesium chloride to provide the active source in a teletherapy type radiotherapy unit. In Brazil such a source was stolen by scrap metal workers from a disused radiotherapy clinic, serious injurys and deaths occurred as a result of external gamma exposure and internal exposure (the source was smashed open releasing the water soluble cesium chloride). See the Goiânia accident for further details. A radionuclide is an atom with an unstable nucleus. ... Nuclear medicine is a branch of medicine and medical imaging that uses unsealed radioactive substances in diagnosis and therapy. ... When normal cells are damaged beyond repair, they are eliminated by apoptosis. ... Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles. ... Strontium titanate is an oxide of strontium and titanium with the chemical formula SrTiO3. ... External beam radiotherapy is the most common form of radiotherapy where a patient lies on a couch and an external source of X-rays is pointed at a particular part of the body. ... Radioactive decay is the set of various processes by which unstable atomic nuclei (nuclides) emit subatomic particles. ... Categories: Stub | Waste ... Radiation therapy (or radiotherapy) is the medical use of ionizing radiation as part of cancer treatment to control malignant cells (not to be confused with radiology, the use of radiation in medical imaging and diagnosis). ... A clinic or outpatient clinic is a small medical facility that provides health care for ambulatory patients - as opposed to inpatients treated in a hospital. ... The Goiânia accident was an incident of radioactive contamination that killed several individuals and injured many others. ...

Reference

1. ↑ Tver'yanovich, Y. S. et al. (1998). Glass Phys. Chem., 24, 446.

External links

• WebElements
• Sigma-Aldrich Co.