Graphite (named by Abraham Gottlob Werner in 1789 from the Greek graphein: 'to draw/write',for its use in pencils) is one of the allotropes of carbon. Unlike diamond,graphite is an electrical conductor,and can be used,for instance,in the electrodes of an arc lamp | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Winters, Charles D. |
Taille de l’image : | 4500 px × 4807 px |
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