Data compilation copyright Beryllium fluoride forms a basic constituent of the preferred fluoride salt mixture used in liquid-fluoride nuclear reactors. Other . The structure of solid BeF2 resembles that of cristobalite. Gaseous beryllium fluoride adopts a linear structure, with a Be-F distance of 143 pm. Your institution may already be a subscriber. Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. Data compiled by: John E. Bartmess Note: Please consider using thereaction search for this species. ; Skokan, E.V. Its structure resembles that of quartz, but BeF2 is highly soluble in water. Contents. This white solid is the principal precursor for the manufacture of beryllium metal. As well as some industrial applications, it is used as a reagent in inorganic and organofluorine chemistry. Pallavi Ghalsasi, Prasanna S. Ghalsasi, "Single Crystal X-Ray Structure of BeF2: α-Quartz" Inorg. As a gas it adopts a linear triatomic structure and in the liquid state a fluctuating tetrahedral structure. Database and to verify that the data contained therein have FLiBe is a molten salt made from a mixture of lithium fluoride (LiF) and beryllium fluoride (BeF2). © 2018 by the U.S. Secretary of Commerce The fluoride salt of beryllium (+2 oxidation state). Other name: Beryllium difluoride CAS no. It is a violet-red colored crystalline solid that melts to an orange-red liquid. Searches may be limited Beryllium sulfate normally encountered as the tetrahydrate, [Be(H2O)4]SO4 is a white crystalline solid. Vacuum-tight windows and … in these sites and their terms of usage. Beryllium fluoride is exceptionally chemically stable and LiF/BeF2 mixtures (FLiBe) have low melting points (360 °C - 459 °C) and the best neutronic properties of fluoride salt combinations appropriate for reactor use. Beryllium fluoride has unique optical properties. By formula: AlF4- + BeF2 = (AlF4- • BeF2), By formula: Be2F5- + BeF2 = (Be2F5- • BeF2), Nikitin, Sorokin, et al., 1980 This page allows searching Typically beryllium fluoride is mixed with lithium fluoride to form a base solvent (FLiBe), into which fluorides of uranium and thorium are introduced. Beryllium iodide is the chemical compound with the formula BeI2. The ion has a tetrahedral shape, the same size and outer electron structure as sulfate. Anhydrous AlF3 is used in the production of aluminium metal. Chem., 1980, 54, page]. ; Sorokin, I.D. The increased toxicity of beryllium in the presence of fluoride has been noted as early as 1949. However, NIST makes no warranties to that effect, and NIST and Informatics, Vibrational and/or electronic energy levels, X-ray Photoelectron Spectroscopy Database, version 4.1, NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data), gas phase; value altered from reference due to conversion from electron convention to ion convention, gas phase; Fluoride Affinity: 19.9±1.7 kcal < AlF, Enthalpy of reaction at standard conditions. Note: Please consider using the also available. Beryllium fluoride(Be2F4) Other . A general reaction searchform is also available. Molecular formula. Beryllium hydride is an inorganic compound with the chemical formula n. This alkaline earth hydride is a colourless solid that is insoluble in solvents that do not decompose it. : 232-118-5 Molecular formula: BeF2 Molecular weight: 47.009 Melting point: 545 ℃ Boiling point beryllium;difluoride . J. Phys. ... Beryllium fluoride (BeF2) Other . Technology, Office of Data Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. Be2+ centers are four coordinate and tetrahedral and the fluoride centers are two-coordinate. [8] BeF2 reaches a vapor pressure of 10 Pa at 686 °C, 100 Pa at 767 °C, 1 kPa at 869 °C, 10 kPa at 999 °C, and 100 kPa at 1172 °C. [11], Reduction of BeF2 at 1300 °C with magnesium in a graphite crucible provides the most practical route to metallic beryllium:[8], The chloride is not a useful precursor because of its volatility. This white solid is the principal precursor for the manufacture of beryllium metal. NIST Standard Reference The chemical formula for the compound formed from beryllium and fluorine is BeF2, which is called beryllium fluoride. Because of its low atomic number and very low absorption for X-rays, the oldest and still one of the most important applications of beryllium is in radiation windows for X-ray tubes. Examples of these are the Langbeinites, and Tutton's salts. NIST subscription sites provide data under the Properties Russ. Formula: BeF 2; Molecular weight: 47.008988; CAS Registry Number: 7787-49-7 Information on this page: Ion clustering data; References; Notes; Other data available: Gas phase thermochemistry data Its structure resembles that of quartz, but BeF 2 is highly soluble in water.. All rights reserved. Copyright for NIST Standard Reference Data is governed by It dispersive power is the lowest for a solid at 0.0093, and the non linear coefficient is also the lowest at 2 × 10−14. [14] The LD50 in mice is about 100 mg/kg by ingestion and 1.8 mg/kg by intravenous injection. Heating purified (NH4)2BeF4 gives the desired product: In general the reactivity of BeF2 ions with fluoride are quite analogous to the reactions of SiO2 with oxides. Data Program, but require an annual fee to access. beryllium fluoride. Tetrafluoroberyllate or orthofluoroberyllateBeF2−4 is an anion containing beryllium and fluorine. Thus, ADP and beryllium fluoride together tend to bind to ATP sites and inhibit protein action, making it possible to crystallise proteins in the bound state.[12][13]. xH2O. Follow the links above to find out more about the data Beryllium fluoride is the inorganic compound with the formula BeF2. Chem., 2011, 50 (1), pp 86–89. Cadmium hydride is an inorganic compound with the chemical formula (CdH2)n. It is a solid, known only as a thermally unstable, insoluble white powder. Antimony trifluoride is the inorganic compound with the formula SbF3. It is a colorless liquid which reacts readily with water. [9], 'Molecules' of liquid beryllium fluoride have a fluctuating tetrahedral structure. A general reaction search form is Beryllium compounds are highly toxic. by the U.S. Secretary of Commerce on behalf of the U.S.A. It was first isolated in 1815 by Jons Jakob Berzelius. to ion clustering reactions. National Institute for Occupational Safety and Health, "The structure of bovine F1-ATPase inhibited by ADP and beryllium fluoride", "Fluoride complexes of aluminium or beryllium act on G-proteins as reversibly bound analogues of the gamma phosphate of GTP", https://www.nap.edu/catalog/11571/fluoride-in-drinking-water-a-scientific-review-of-epas-standards, IARC Monograph "Beryllium and Beryllium Compounds", National Pollutant Inventory: Beryllium and compounds fact sheet, National Pollutant Inventory: Fluoride and compounds fact sheet. In the form of fluoroberyllate glass it has the lowest refractive index for a solid at room temperature of 1.275. [citation needed], Beryllium fluoride is used in biochemistry, particularly protein crystallography as a mimic of phosphate. IUPAC names . with the development of data collections included in Beryllium fluoride, BeF2. Standard Reference Data Act. The molecular formula identifies each type of element by its chemical symbol and identifies the number of atoms of each element found in one discrete molecule of the substance. Except where otherwise noted, data are given for materials in their. Additionally, the density of liquid BeF2 decreases near its freezing point, as Be2+ and F− ions begin to coordinate more strongly with one another, leading to the expansion of voids between formula units.[10]. the Sometimes called Swarts' reagent, is one of two principal fluorides of antimony, the other being SbF5. on behalf of the United States of America. Unlike the ionically bonded hydrides of the heavier Group 2 elements, beryllium hydride is covalently bonded. It is very hygroscopic and reacts violently with water, forming hydroiodic acid. They are all colorless solids. Go To: Top, References, Notes Data compilation copyrightby the U.S. Secretary of Commerce on behalf of the U.S.A.All rights reserved. In the solid state it exists as a glass, with four-coordinate Be2+ tetrahedral centres and two-coordinate fluoride centres. Several occur as minerals. Nikitin, M.I. It served both purposes in the Molten-Salt Reactor Experiment (MSRE) at the Oak Ridge National Laboratory.