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The Physics Of A Crystal
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Most simple chemical compounds consist of crystals. If you were to examine a lump of crystalline material very closely, you would be able to see tiny individual crystals. All crystals have a definite geometric shape, determined by the way the atoms are linked together.
Mineralogists recognize 32 different classes of crystal, which are g .... Middle of paper
.... allotropes, normal oxygen and ozone. Pure carbon also has two allotropes, diamond and graphite. A crystal of diamond is in fact a single giant molecule in which every carbon atom is linked to four other, by four equal, strong bonds. These bonds are arranged tetrahedrally round each atom and there are no planes along which the giant molecule can easily be split. This quality is what gives diamond its tremendous hardness.
Graphite on the other h ....
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Number of words: 331
Number of pages: 2 (approx. 250 words per double-spaced page)
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