1 edition of Gallium melting-point standard found in the catalog.
Gallium melting-point standard
1977 by U.S. Dept. of Commerce, National Bureau of Standards, for sale by the Supt. of Docs., U.S. Govt. Print. Off. in [Gaithersburg, Md.], Washington .
Written in English
|Statement||B. W. Mangum and D. D. Thornton, editors ; Heat Division, Institute for Basic Standards, National Bureau of Standards.|
|Series||National Bureau of Standards special publication ; 481, NBS special publication ;, 481.|
|Contributions||Mangum, B. W., Thornton, Donald D., United States. Institute for Basic Standards. Heat Division.|
|LC Classifications||QC100 .U57 no. 481, QD518 .U57 no. 481|
|The Physical Object|
|Pagination||v p., p. 709-737 :|
|Number of Pages||737|
|LC Control Number||77600017|
The calibration apparatus permits the gallium to melt coaxially over 12 to 16 hours. Gallium melts near room temperature and has one of the largest liquid ranges of any metal, so it has found use in high temperature thermometers. One of the most popular gallium demonstrations is melting gallium in the palm of your hand. Gallium took the place of the placeholder element eka-aluminum. Gallium forms a very reflective surface on glass making an excellent mirror.
From these, it can be extracted in different ways. High-purity gallium is attacked slowly by mineral acids. Because that blue line did not match any known element, they hypothesized a new element was present in the minerals. Chemistry of the Elements 2nd ed. All the other isotopes are radioactive, with gallium being the longest-lived half-life 3.
Some flue dusts from burning coal have been shown to contain as much 1. Characteristics and Properties Under standard conditions gallium is a soft metal with a silvery color. Indium III oxideIn2O3, forms when indium metal is burned in air or when the hydroxide or nitrate is heated. How was it discovered?
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Anne Marie Helmenstine, Ph. Gallium arsenide is used to produce ultra-brite blue LEDs. Liquid gallium is known for its ability to wet glass, porcelain and skin. Simply place the piece of gallium in the palm of your hand and let the warmth of your body heat do the work!
Expect this to take around minutes for a coin-sized piece of metal. Discovered by: Paul Emile Lecoq de Boisbaudran in Gallium is the third element in the thirteenth column of the periodic table. One of gallium's interesting properties is its low melting point and high boiling point.
The compounds are Lewis acidssomewhat akin to the better known aluminium trihalides. A second generation of devices with shorter gate lengths will address higher frequency telecom and aerospace applications.
Bauxite and the mineral sphalerite, as well as coal, often contain gallium as an impurity. Gallium is not found in its elemental form on Earth, but it is found in minerals and ores in the Earth's crust. Gallium is a fairly reactive element that reacts readily with acids and alkalis.
Gallium attacks other metals, so do not let it come into contact with jewelry or store it in metal containers.
From the Latin word for France, Gallia. Gallium is more abundant: it makes up about The Isothermal Gallium Cell and Apparatus have a long 20 year history, and have been successfully used in most National and Primary Laboratories world-wide.
See also: Category:Gallium compounds. Chemistry of the Elements 2nd ed.
Description Named from the Latin word for France, gallium is a soft silvery metal with many unusual properties. The bonding between the nearest neighbors is found to be of covalent character, hence Ga2 dimers is seen as the fundamental building block of the crystal.
Each atom has only one nearest neighbor at a distance of 2. Stick with gallium. Nanoscale[ edit ] GaN nanotubes and nanowires are proposed for applications in nanoscale electronicsoptoelectronics and biochemical-sensing applications. Biological Rating No known benefits to life processes.
This is used over fiber optics to carry information long distances. Characteristics and Properties Under standard conditions gallium is a soft metal with a silvery color.
Gallite is a common gallium-bearing mineral. Gallium took the place of the placeholder element eka-aluminum.
Gallium is obtained as a byproduct in the production of zinc and aluminum.Aug 01, · gallium, International Temperature Scale ofITS, melting point, SPRT, SRMstandard platinum resistance thermometry, thermometric fixed-point cell Thermometry metrology Created August 1,Updated February 19, Author: Gregory F.
Strouse. This melting point standard also uniquely designed to freeze the cell from bottom up, which eliminates the danger of damage from the expansion of gallium during freezing. 1. The Model Gallium Cell may be used, without the thermal environment provided by Model B Gallium Apparatus, in a.
The gallium melting-point standard: its role in manufacture and quality control of electronic thermometers for the clinical laboratory.
Sostman HE. I discuss the traceability of calibration of electronic thermometers to thermometric constants of nature or to the National Bureau of Standards, form a manufacturer's basic standards through the Cited by: 4.
Xubuntu. Built on top of Xubuntu to provide a lightweight and fully functional desktop. Image showing periodicity of melting point for the chemical elements as colour-coded squares on a periodic table grid.
Enthalpies. Enthalpy of Enthalpy of atomisation: kJ mol-1; Thermodynamic data. This table gives a few thermodynamic data for gallium. Most values are those given in the NBS technical notes (reference 1) after conversion. Note: Citations are based on reference standards. However, formatting rules can vary widely between applications and fields of interest or study.
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