cadmium

Definitions

  • WordNet 3.6
    • n cadmium a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores
    • ***
Webster's Revised Unabridged Dictionary
    • n Cadmium (Chem) A comparatively rare element related to zinc, and occurring in some zinc ores. It is a white metal, both ductile and malleable. Symbol Cd. Atomic weight 111.8. It was discovered by Stromeyer in 1817, who named it from its association with zinc or zinc ore.
    • ***
Century Dictionary and Cyclopedia
    • n cadmium Atomic weight, 112.1; chemical symbol, Cd. A metal discovered by Stromeyer in 1817, resembling tin in color and general appearance, and, like that metal, having a “cry” when bent. The specific gravity of the cast metal is 8.62; of the rolled, 8.69. Its hardness is between that of gold and tin, and it is easily rolled to sheets or even to very thin foil. It fuses at about the same temperature as tin, 467°F., and communicates to various alloys the property of fusing at very low temperatures. (See Wood's metal, under metallurgy) If 8 to 10 per cent. of cadmium be added to Rose's metal, its fusing-point is lowered to 167°. Cadmium is a common accompaniment of zinc ores, both blende and calamin, and it is in the smelting of these that the commercial metal is obtained, which is done almost exclusively in Silesia and Belgium. Some kinds of blende contain as much as 3 or 4 per cent. of sulphid of cadmium. This metal also occurs by itself naturally in combination with sulphur, forming the rare mineral called greenockite (which see). The manufactured sulphuret is of importance as furnishing a brilliant and permanent yellow color called cadmium-yellow (see below). This is used by artists, also in coloring soap, and to some extent in calico-printing; it is also used for giving a yellow luster to the surface of porcelain. The total produce of cadmium is supposed to be about two tons a year.
    • ***
Chambers's Twentieth Century Dictionary
    • n Cadmium kad′mi-um a white metal occurring in zinc ores.
    • ***

Etymology

Webster's Revised Unabridged Dictionary
NL. See Cadmia
Chambers's Twentieth Century Dictionary
See Cadmia.

Usage

In literature:

The ammonium and cadmium play a secondary part in the process, and are not absolutely necessary in forming the image.
"Scientific American Supplement, No. 288" by Various
The use of cadmium is materially restricted by its relatively limited supply.
"Scientific American Supplement, No. 520, December 19, 1885" by Various
The heating of the liquid prevents the solution of iron, manganese, and cadmium.
"Scientific American Supplement, No. 455, September 20, 1884" by Various
The metals tellurium and cadmium are susceptible of solution, but the heat required is a high one.
"A System of Instruction in the Practical Use of the Blowpipe" by Anonymous
Another pair of groups show the same tetrahedral form: magnesium, zinc and cadmium, positive; sulphur, selenium and tellurium, negative.
"Occult Chemistry" by Annie Besant and Charles W. Leadbeater
Magnesium in particular, also zinc and cadmium, were greatly depressed in electromotive force in electrolytes by elevation of temperature.
"Scientific American Supplement, No. 443, June 28, 1884" by Various
Cadmium is a white metal, possessing a bluish tinge, and is capable of taking a high polish; on breaking, it shows a distinct fibrous fracture.
"Encyclopaedia Britannica, 11th Edition, Volume 4, Part 4" by Various
Thus C stands for carbon, Cl for chlorine, Cd for cadmium, Ce for cerium, Cb for columbium.
"An Elementary Study of Chemistry" by William McPherson
Behind that there ran a great breadth of knee-high stubble, blazing ochre and cadmium in the sunlight.
"Hawtrey's Deputy" by Harold Bindloss
Instantly all the flesh tones from rose madder and cadmium to indigo-blue ran riot in his head.
"Colonel Carter's Christmas and The Romance of an Old-Fashioned Gentleman" by F. Hopkinson Smith
Germany's cadmium is produced by fractional distillation of the Silesian zinc ores, which contain at most 0.3 per cent cadmium.
"The Economic Aspect of Geology" by C. K. Leith
One of these consists of the Cadmium and the positives, while the other consists of the Cadmium and the negatives.
"The Automobile Storage Battery" by O. A. Witte
Greens and yellows made by the admixture of chrome are apt to be crude as compared with those in which cadmium was used.
"The Painter in Oil" by Daniel Burleigh Parkhurst
With copper, platinum, lead, iron, cadmium, carbon and mercury the effects with ordinary light are too small to be appreciable.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 8" by Various
Only three cadmium rods when he needed at least three dozen!
"Spillthrough" by Daniel F. Galouye
There are, however, some exceptions to this rule, such as the sulphates of copper, cadmium, zinc, and nickel.
"The Mechanism of Life" by Stéphane Leduc
The melting points of the pure metals are, zinc, 419deg; cadmium, 322deg; silver, 960deg; copper, 1081deg; aluminium, 650deg.
"The Phase Rule and Its Applications" by Alexander Findlay
Laurie's daffodil cadmium is very pretty.
"The Life, Letters and Work of Frederic Leighton" by Mrs. Russell Barrington
Eight grains of bromide of cadmium dissolved in half a drachm of pure water were now added, and the solution stirred gently.
"The Evolution of Photography" by John Werge
Using vacuum tubes containing, for example, mercury or cadmium vapour, A.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 6" by Various
***

In news:

Toxic cadmium , up to 91%, added to kids' jewelry as China gets lead out.
Associated Press In this Dec 17, 2009 photo, Jeff Weidenhamer, professor of chemistry at Ashland University, holds up a charm that he is testing for cadmium in Ashland, Ohio.
Barred from using lead, some Chinese manufacturers have been substituting the more dangerous heavy metal cadmium in sparkling charm bracelets and shiny pendants sold throughout the United States.
Products Finishing, Arthur S. What should we do with a plating bath that is a least 20 years old and has a cyanide cadmium solution that is emitting a strong ammonia smell.
According to the Department of Environmental Conservation, this includes the disposal of nickel-cadmium batteries, dry cells and the popular lithium ion batteries.
Environmental groups say the deepening needs a South Carolina pollution permit because the dredging will remove toxic cadmium and deposit it on the South Carolina shore.
She said the cadmium selenide shell surrounding the hole is nanocrystalline and is enveloped in a soft outer shell of pure selenium.
Lead, mercury, cadmium, and aluminum are toxic metals to which we are becoming increasingly exposed.
Cadmium — a carcinogen found in many crops and shellfish — increases women's risk of breast cancer.
The Ivadizer is a greener way to prevent corrosion than the old cadmium processes.
But environmental groups in both states have sued, saying the US Army Corps of Engineers needs a South Carolina pollution permit for the project because the dredging will remove toxic cadmium and deposit it on the South Carolina shore.
Another chain pulls cadmium-tainted kids' jewelry .
The McDonald's recall of 12 million Shrek glasses has prompted a House investigation of cadmium in children's products .
KONA reports rain exposed cadmium, mercury and PCBs.
Cadmium Regulation Takes Center Stage.
***

In science:

The emphasis in this paper has been on the zinc and cadmium clusters as model systems with a strong tendency to disorder.
Identifying structural patterns in `disordered' metal clusters
The planned experiments are: • The COBRA (Cadmium-Telluride O neutrino double Beta Research Apparatus) collaboration also plans to use 130Te candidates (and 116Cd) under the form of a new generation of semiconductors.
Recent advances in neutrinoless double beta decay search
Metallic cadmium and indium targets were bombarded with fast neutrons from the Li+H2 reaction at the University of Michigan cyclotron.
Discovery of the Silver Isotopes
In the 1949 paper Radioactive Isotopes of Silver Produced by Photo-Disintegration of Cadmium, Duffield and Knight reported the discovery of 113Ag .
Discovery of the Silver Isotopes
In the 1949 paper Radioactive Isotopes of Silver Produced by Photo-Disintegration of Cadmium, Duffield and Knight reported the discovery of 115Ag .
Discovery of the Silver Isotopes
Because of the similarity of these energy levels, it is proposed to assign the 2.5 min Ag to the mass number 116.” The identification of 117Ag was determined from the relationship to cadmium decay curves: “The Cd decay curves of the successive extracts were analysed into components of chains of masses 115 and 117.
Discovery of the Silver Isotopes
Thirty-seven cadmium isotopes have so far been observed; the discovery of these isotopes is discussed.
Discovery of the Cadmium Isotopes
The discovery of the cadmium isotopes is discussed as part of the series of the discovery of isotopes which began with the cerium isotopes in 2009 .
Discovery of the Cadmium Isotopes
About 50% of all possible cadmium isotopes have been produced and identified so far.
Discovery of the Cadmium Isotopes
Figure A summarizes the year of first discovery for all cadmium isotopes identified by the method of discovery.
Discovery of the Cadmium Isotopes
Cadmium isotopes as a function of time they were discovered.
Discovery of the Cadmium Isotopes
In the following, the discovery of each cadmium isotope is discussed in detail.
Discovery of the Cadmium Isotopes
The discoveries of the known cadmium isotopes have been compiled and the methods of their production discussed.
Discovery of the Cadmium Isotopes
We found evidence for two distinct populations of detectors: the main one centered at 0.64 eV, interpreted as due to cadmium vacancies in the crystal, and the second population centered at 0.54 eV, correlated with a lower apparent resistivity.
Extensive testing of Schottky CdTe detectors for the ECLAIRs X-Gamma-ray Camera on board the SVOM mission
This particular level is often interpreted as being due to cadmium vacancies, and might depend on the thermal treatment during the crystal growth .
Extensive testing of Schottky CdTe detectors for the ECLAIRs X-Gamma-ray Camera on board the SVOM mission
***