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52 Te Tellurium

Metalloid, mass: 127.6 u, 4 stable isotopes (122, 124, 125, 126), 2 nearly stable, more frequent isotopes (128, 130), abundance rank (earth/space): 73/38

Click image to magnify. Metallic tellurium, front and back side. Original diameter in cm: 3.5
Tellurium Tellurium disk
The semimetal tellurium is chemically similar to selenium. It is more metallic and somewhat less toxic than this, but its compounds smell even worse. Tellurium probably has no biological role and has only very few, special applications. It can form nice crystals and sometimes natively occurs in nature, however it is very rare. Tellurium is the element that most easily forms compounds with gold, therefore it sometimes accrues as waste at the extraction of gold.

Tellurium crystals Oxidized tellurium
Right: more than four years after, slight traces of oxidation show, apparently the tellurium reacted slowly with the acrylic glass in which it is embedded.

Cadmium telluride
Thin-film solar cells made from cadmium telluride, CdTe.


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Page last changed on July 29. 2020

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