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Caesium iodide
Caesium chloride
IUPAC name Caesium iodide
Identifiers
CAS number [7789-17-5]
Properties
Molecular formula CsI
Molar mass 259. IUPAC Nomenclature is a system of naming Chemical compounds and of describing the science of Chemistry in general CAS registry numbers are unique numerical identifiers for Chemical compounds Polymers biological sequences mixtures and Alloys They are also referred to A chemical formula is a way of expressing information about the Atoms that constitute a particular Chemical compound, and how the relationship between those atoms changes Caesium or cesium (ˈsiːziəm is the Chemical element with the symbol Cs and Atomic number 55 Iodine (ˈaɪədaɪn ˈaɪədɪn or /ˈaɪədiːn/ from ιώδης iodes "violet" is a Chemical element that has the symbol I and Atomic Molar mass, symbol M, is the Mass of one mole of a substance ( Chemical element or Chemical compound) 8 g/mol
Density 4. The density of a material is defined as its Mass per unit Volume: \rho = \frac{m}{V} Different materials usually have different 51 g/cm3, solid
Melting point

621 °C
Boiling point

1277±5 °C
Solubility in water 44 g/100 ml (0 °C)
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)
Infobox disclaimer and references

Caesium iodide (CsI) is an ionic compound often used as the input phosphor of an x-ray image intensifier tube found in fluoroscopy equipment. The melting point of a solid is the temperature range at which it changes state from solid to Liquid. The boiling point of a liquid is the temperature at which the Vapor pressure of the liquid equals the environmental pressure surrounding the liquid Solubility is the characteristic Physical property referring to the ability of a given substance the Solute, to dissolve in a Solvent. Water is a common Chemical substance that is essential for the survival of all known forms of Life. In Chemistry, the standard state of a material is its state at 1 bar (100 Kilopascals exactly An ion is an Atom or Molecule which has lost or gained one or more Valence electrons giving it a positive or negative electrical charge A phosphor is a substance that exhibits the phenomenon of Phosphorescence (sustained glowing after exposure to energized particles such as Electrons An X-ray image intensifier (XRII sometimes referred to as a C-Arm or Fluoroscope in medical settings is a highly complex piece of equipment which uses Fluoroscopy is an imaging technique commonly used by Physicians to obtain real-time moving images of the internal structures of a patient through the use of a fluoroscope

An important application of caesium iodide crystals, which are scintillators, is electromagnetic calorimetry in experimental particle physics. In Materials science, a crystal is a Solid in which the constituent Atoms Molecules or Ions are packed in a regularly ordered repeating A scintillator is a substance that absorbs high-energy (ie Ionizing) electromagnetic or charged Particle radiation then in response fluoresces In Particle physics, a calorimeter is an experimental apparatus that measures the Energy of particles. Particle physics is a branch of Physics that studies the elementary constituents of Matter and Radiation, and the interactions between them Pure CsI is a fast and dense scintillating material with relatively high light yield. It shows two main emission components. One in the near ultraviolet region at the wavelength of 310 nm and one at 460 nm. Ultraviolet ( UV) light is Electromagnetic radiation with a Wavelength shorter than that of Visible light, but longer than X-rays In Physics wavelength is the distance between repeating units of a propagating Wave of a given Frequency. A nanometre ( American spelling: nanometer, symbol nm) ( Greek: νάνος nanos dwarf; μετρώ metrό count) is a The drawbacks of CsI are a high temperature gradient and a slight hygroscopicity. In atmospheric sciences ( Meteorology, Climatology and related fields the temperature gradient (typically of air, more generally of any Fluid Hygroscopy is the ability of a substance to attract Water Molecules from the surrounding environment through either absorption or Adsorption

Caesium iodide can be used in Fourier Transform Infrared (FT-IR) spectrometers as a beamsplitter. Fourier transform spectroscopy is a measurement technique whereby spectra are collected based on measurements of the temporal coherence of a radiative source CsI has a wider transmission range than the more common potassium bromide beamsplitters, extending usefulness in to the far infrared. Potassium bromide ( K[[Bromine Br]] is a salt, widely used as an Anticonvulsant and a Sedative in the late 19th and early 20th centuries A problem with optical-quality CsI crystals are very soft with no cleavage, making it difficult to create a flat polished surface. Also the CsI optical crystals must be stored in a desiccator to prevent water damage to the surfaces, and coated (typically with germanium) to minimise water damage from short term atmospheric exposure during beamsplitter swapouts.

Optical properties

Physical properties

References


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