| The
symmetry of crystals : |
 |
Go
to Albite |
|
|
| The
crystals show in their form and their |
 |
appear
the following symmetrical operations:
> >
·
Rotation
·
Inversion by symmetry plane
·
Inversion
by a center
·
Combination of rotation and inversion |
| 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). |
 |
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 |
|
|
is
determined by operators of |
|
|
symmetry,
there are three principal |
|
|
types
of them: Axis of
symmetry, |
|
|
symmetry
plane and the center |
|
|
of
symmetry. |
|
|
|
|
|
