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| 52 Te 127.60(3) |
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Discovered by Franz Joseph Muller von Reichstein. Location: Romania. Year: 1783.Name originated from the Latin word "tellus" meaning "earth." Tellurium was discovered in gold ores by Franz Joseph Muller von Reichenstein, the chief inspector of mines in Trannsylvania in 1782. However tellurium was named by M. Klaproth, who isolated it in 1798, after he continued Muller von Reichenstein's work.
Kossel Shell Structure of Tellurium
The electron configuration of Tellurim is [Kr].4d10.5s2.5p4.
| Some of the uses for Tellurium include: |
| •semiconductors |
| •alloying with cast iron, copper and stainless steel |
| •addition to lead to prevent corrosion |
| •ceramics |
| •tinting glass |
The atomic radii of Te is 123 pm
| Ion | Coordination type | Radius/pm | ||
| Te(IV) | 4-coordinate, tetrahedral | 80 | ||
| Te(VI) | 4-coordinate, tetrahedral | 57 | ||
| Te(IV) | 6-coordinate, octahedral | 111 | ||
| Te(VI) | 6-coordinate, octahedral | 70 | ||
| 120Te | 122Te | 123Te | 124Te | 125Te | 126Te | 128Te | 130Te |
| Physical Properties: | º solid at 298 K | º color is silvery lustrous grey | º class. is Semi-metallic | º exhibits a metallic lustre when pure | º brittle and easily pulverised | º p-type semiconductor | º shows varying conductivity with crystal alignment | º conductivity increases slightly with exposure to light |
