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Cadmium: Difference between revisions
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[[File:example.jpg|thumb|150px|left|Description]] | [[File:example.jpg|thumb|150px|left|Description]] | ||
The word '''cadmium''' comes from the Latin word '''cadmia''' and the Greek word '''kadmeia''', which are words from the old languages used to describe calamine (zinc carbonite). | The word '''cadmium''' comes from the Latin word '''cadmia''' and the Greek word '''kadmeia''', which are words from the old languages used to describe calamine (zinc carbonite). | ||
A German chemist named Friedrich Strohmeyer discovered cadmium in 1817 while studying samples of calamine (ZnCO3). When the zinc carbonite was heated, Strohmeyer noticed that some samples of the calamine gave off a yellow color, while other samples did not. After further experimentation, Friedrich determined that the samples of calamine giving off color when heated contained trace amounts of a new element. The only mineral that contains any significant amounts of cadmium is greenockite (CdS), but it is not common enough to mine for any profit. Fortunately, small amounts of cadmium can be found in zinc ores, and most of the cadmium used today is gathered as a byproduct of mining and zinc refinement. | |||
http://education.jlab.org/itselemental/ele048.html | http://education.jlab.org/itselemental/ele048.html | ||
