| Barium fluoride | | Image:Barium fluoride.jpg | | General | | Molecular formula | BaF2 | | Molar mass | 175.324 g.mol-1 | | Appearance | white cubic crystals | | CAS number | 7787-32-8 | | Properties | | Density and phase | 4.893 g.cm-3, solid | | Solubility in water | 1.7 g/kg (26°C) | | Solubility in methanol | | | Solubility in ethanol | | | Melting point | 1368 °C | | Boiling point | 2260 °C | | Magnetic Susceptibility | -5.1e-005 cm³/mol | | Structure | Coordination
geometry | ? | | Crystal structure | cubic | | Thermodynamic data | Std enthalpy of
formation ? fHo298 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. ...
Density (symbol: Ï - Greek: rho) is a measure of mass per 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. ...
This article describes water from a scientific and technical perspective. ...
It has been suggested that this article or section be merged with Solution. ...
methanol is also used to fuel speedway bikes. ...
It has been suggested that this article or section be merged with Solution. ...
Ethanol, also known as ethyl alcohol or grain alcohol, is a flammable, colorless, mildly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ...
The melting point of a crystalline 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. ...
In electrical engineering, the magnetic susceptibility is the degree of magnetization of a material in response to an applied magnetic field. ...
The coordination geometry of an atom is the geometrical pattern formed by its neighbors in a molecule or a crystal. ...
Enargite crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ...
To meet Wikipedias quality standards and make it easier to understand, this article or section may require cleanup. ...
The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy that accompanies the formation of 1 mole of a substance in its standard state from its constituent elements in their standard states (the most stable form of the element at 1 atmosphere...
| −???? kJ/mol | Standard molar
entropy So298 | ??? J·K−1·mol−1 | | Heat of Fusion | 101.5 J/g | | Hazards | | MSDS | External MSDS | | EU classification | Toxic (T) | | R-phrases | R20, R22 | | S-phrases | S28 | | Flash point | Non-flammable | | Supplementary data page | Structure and
properties | n, εr, etc. | Thermodynamic
data | Phase behaviour
Solid, liquid, gas | | Spectral data | UV, IR, NMR, MS | | Related compounds | | Other anions | Barium chloride
Barium bromide
Barium iodide | | Other cations | Calcium fluoride
Strontium fluoride | Except where noted otherwise, data are given for
materials in their [[standard state|standard state (at 25 °C, 100 kPa)]]
Infobox disclaimer and references In chemistry, the standard molar entropy is the entropy content of one mole of substance, under conditions of standard temperature and pressure. ...
Heat of fusion is the amount of heat energy which must be absorbed or lost for 1 gram of a substance to change states from a solid to a liquid or vice versa. ...
A material safety data sheet or MSDS is a form containing data regarding the properties of a particular substance. ...
Council Directive 67/548/EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (as amended) is the main source of European Union law concerning chemical safety. ...
R-phrases are defined in Annex III of European Union Directive 67/548/EEC: Nature of special risks attributed to dangerous substances and preparations. ...
S-phrases are defined in Annex IV of European Union Directive 67/548/EEC: Safety advice concerning dangerous substances and preparations. ...
The flash point of a flammable liquid is the lowest temperature at which it can form an ignitable mixture with air. ...
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 a mass spectrometer Mass spectrometry (also known as mass spectroscopy (deprecated)[1] or in common speech mass-spec) is an analytical technique used to measure the mass-to-charge ratio of ions. ...
An ion is an atom or group of atoms that normally are electrically neutral and achieve their status as an ion by loss or addition of one or more electrons. ...
Barium chloride (BaCl2) is a salt of barium and chlorine. ...
Barium iodide occurs in two forms, one anhydrous and the other hydrated. ...
An ion is an atom or group of atoms that normally are electrically neutral and achieve their status as an ion by loss or addition of one or more electrons. ...
Calcium fluoride (CaF2) is an insoluble ionic compound of calcium and fluorine. ...
Strontium fluoride, SrF2, is a compound of strontium and fluorine. ...
| Barium fluoride (BaF2) is a chemical compound of barium and fluorine, also known as Barium(II) fluoride. It is a solid which can be a transparent crystal. General Name, Symbol, Number barium, Ba, 56 Chemical series alkaline earth metals Group, Period, Block 2, 6, s Appearance silvery white Atomic mass 137. ...
General Name, Symbol, Number fluorine, F, 9 Chemical series halogens Group, Period, Block 17, 2, p Appearance Yellowish brown gas Atomic mass 18. ...
Applications
Barium Fluoride is transparent from the ultraviolet to the infrared, from 150-200 nm to 11-11.5 µm, and can be used as a material to make optical components such as lenses. It is used eg. in windows for infrared spectroscopy, in particular in the field of fuel oil analysis. Its transmittance at 200 nm is relatively low (0.60), but at 500 nm it goes up to 0.96-0.97 and stays at that level until 9 µm, then it starts falling off (0.85 for 10 µm and 0.42 for 12 µm). Ultraviolet (UV) light is electromagnetic radiation with a wavelength shorter than that of visible light, but longer than soft X-rays. ...
Image of a small dog taken in mid-infrared (thermal) light (false color) Infrared (IR) radiation is electromagnetic radiation of a wavelength longer than that of visible light, but shorter than that of radio waves. ...
A nanometre (American spelling: nanometer) is 1. ...
IR spectrum of a thin film of liquid ethanol. ...
In the fields of optics and spectroscopy, transmittance is the fraction of incident light at a specified wavelength that passes through a sample. ...
Barium fluoride is also a common, very fast (one of the fastest) scintillator for the detection of X-rays, gamma rays or other high energy particles. One of its applications is the detection of 511 keV gamma photons in positron emission tomography; other material used in this application is eg. bismuth germanate. It responds also to alpha and beta particles, but, unlike most scintillators, it does not glow in ultraviolet light. It can be also used for detection of high-energy (10-150 MeV) neutrons, and use pulse shape discrimination techniques to separate them from simultaneously occurring gamma photons. A scintillator is a device or substance that absorbs high energy (ionizing) electromagnetic or charged particle radiation then, in response, fluoresces photons at a characteristic Stokes-shifted (longer) wavelength, releasing the previously absorbed energy. ...
In the NATO phonetic alphabet, X-ray represents the letter X. An X-ray picture (radiograph) taken by Röntgen An X-ray is a form of electromagnetic radiation with a wavelength approximately in the range of 5 pm to 10 nanometers (corresponding to frequencies in the range 30 PHz...
This article is about electromagnetic radiation. ...
The electronvolt (symbol eV, or, rarely and incorrectly, ev) is a unit of energy. ...
Image of a typical positron emission tomography (PET) facility Positron emission tomography (PET) is a nuclear medicine medical imaging technique which produces a three dimensional image or map of functional processes in the body. ...
Bismuth germanate (BGO, chemical formula Bi4Ge3O12 (evlitine structure) or the less common type Bi12GeO20) is an inorganic chemical compound with main use as a scintillator. ...
This article or section does not cite its references or sources. ...
When heated to 500 °C, it gets corroded by water, but in dry environment it can be used up to 800 °C. Prolonged exposure to moisture degrades transmission in the vacuum UV range. It is less resistant to water than calcium fluoride, but is the most resistant of all the optical fluorides to high-energy radiation, though its far ultraviolet transmittance is lower than theirs. It is quite hard, and very sensitive to thermal shock. Ultraviolet (UV) radiation is electromagnetic radiation of a wavelength shorter than that of the visible region, but longer than that of soft X-rays. ...
Calcium fluoride (CaF2) is an insoluble ionic compound of calcium and fluorine. ...
Thermal shock is the name given to cracking as a result of rapid temperature change. ...
Barium fluoride is used as a preopacifying agent and in enamel and glazing frits production. Its other use is in the production of welding agents (an additive to some fluxes, a component of coatings for welding rods and in welding powders). It is also used in metallurgy, as a molten bath for refining aluminium. Opacifier - A chemical agent added to a material, such as rocket propellant, to make it opaque. ...
The word enamel can mean more than one thing: Tooth enamel Vitreous enamel Enamel (markup language) Enameled wire This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title. ...
Welding is a fabrication process that joins materials, usually metals or thermoplastics, by causing coalescence. ...
In metallurgy, flux is a substance which facilitates soldering, brazing, and welding by chemically cleaning the metals to be joined. ...
Metallurgy is a domain of materials science and of materials engineering that studies the physical and chemical behavior of metallic elements, their intermetallic compounds, and their mixtures, which are called alloys. ...
General Name, Symbol, Number aluminium, Al, 13 Chemical series poor metals Group, Period, Block 13, 3, p Appearance silvery Atomic mass 26. ...
External links - http://www.solvay-fluor.com/chemicals/Barium_fluoride
Suppliers - http://www.crystran.co.uk/products.asp?productid=75
- http://www.almazoptics.com/BaF2.htm
- Korth Kristalle GmbH We grow BaF2 crystals up to usable diameter 200 mm
MSDS - MSDS at Oxford University
- MSDS (pdf)
- safety sheets/baf2sds.pdf MSDS at Crystran (pdf)
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