Difference between revisions of "Graphite"
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'''Graphite''' is a soft [[allotrope]] of [[carbon]], noted for being one of few conductive non-metals. This is caused by its structure; 'sheets' of carbon linked by weak bonds, with every one in two having a 'spare' electron. Its sheet-like structure means that it is often mixed with clay to form the 'lead' in [[pencil|pencils]]. | '''Graphite''' is a soft [[allotrope]] of [[carbon]], noted for being one of few conductive non-metals. This is caused by its structure; 'sheets' of carbon linked by weak bonds, with every one in two having a 'spare' electron. Its sheet-like structure means that it is often mixed with clay to form the 'lead' in [[pencil|pencils]]. | ||
| − | The graphite used in pencils is a natural substance and varies in its characteristics; deposits that have the characteristics that make good pencils are rare. In 1847 a major discovery of high-quality graphite was made in Siberia, and the region became famous. The association of the best pencils with Oriental graphite explains both the traditional yellow color and the name of the Mongol pencil company. | + | The graphite used in pencils is a natural substance and varies in its characteristics; deposits that have the characteristics that make good pencils are rare. In 1847 a major discovery of high-quality graphite was made in [[Siberia]], and the region became famous. The association of the best pencils with [[Oriental]] graphite explains both the traditional [[yellow]] color and the name of the Mongol pencil company. |
[[category:geology]] | [[category:geology]] | ||
Revision as of 02:48, December 2, 2015
Graphite is a soft allotrope of carbon, noted for being one of few conductive non-metals. This is caused by its structure; 'sheets' of carbon linked by weak bonds, with every one in two having a 'spare' electron. Its sheet-like structure means that it is often mixed with clay to form the 'lead' in pencils.
The graphite used in pencils is a natural substance and varies in its characteristics; deposits that have the characteristics that make good pencils are rare. In 1847 a major discovery of high-quality graphite was made in Siberia, and the region became famous. The association of the best pencils with Oriental graphite explains both the traditional yellow color and the name of the Mongol pencil company.