| Symmetry of crystals : |
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Go to Albite |
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| Crystals show in their form and their |
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appear the following symmetrical operations: > >
· Rotation
· Inversion by symmetry plane
· Inversion by a center
· Combination of rotation and inversion
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| structure of the properties of characteristic |
| symmetry. And like there is a cor - |
| respondence between reticular plans and |
| faces of the crystals, there is a |
| fundamental correspondence between |
| internal symmetry and external symmetry. |
| We imagine the drawing of a tapestry, it |
| will repeat ourselves by a simple parallel |
| displacement (translation). |
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When a crystal is examined, the first |
| All the geometrical operations which |
point which draws the attention is a |
| cause a repetition of the pattern are |
certain symmetry. One can see the |
| called operations of symmetry. In the |
repetition of faces identical to various |
| shape of the crystals (external format), |
places of the crystal. These repetitions |
| this translation does not appear directly. |
are controls by laws of symmetry, |
| On the other hand, in their morphology, |
Albite |
the way in which they are repeated |
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is determined by operators of |
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symmetry, there are three principal |
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types of them: Axis of symmetry, |
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symmetry plane and the center |
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of symmetry. |
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