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10: Crystal Morphology and Symmetry
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- The external symmetry of a crystal is the geometrical relationship between its faces and edges.
- Crystal symmetry is a reflection of internal atomic arrangement and symmetry.
- If a crystal has symmetry, the symmetry is common to all of its properties.
- By studying crystal symmetry, we can make inferences about internal atomic order.
- Crystals may have any of an infinite number of shapes, but the number of possible symmetries is limited.
- Crystal symmetry is the basis for dividing crystals into different groups and classes.
- 10.1: Symmetry
- 10.1.1: Introduction
- 10.1.2: Identifying Symmetry
- 10.1.3: Mirror Planes
- 10.1.4: Rotational Symmetry
- 10.1.5: Inversion Centers
- 10.1.6: Symmetry Operates on Everything
- 10.1.7: Symmetry Is a Property
- 10.2: Stereo Diagrams
- 10.2.1: Symmetry on Stereo Diagrams
- 10.3: From Points to Crystal Faces and Forms
- 10.3.1: Special Forms and General Forms
- 10.3.2: Open Forms and Closed Forms
- 10.4: Combinations of Symmetry Elements- Point Groups
- 10.4.1: Special Angles and General Angles
- 10.5: Point Groups and Crystal Systems
- 10.5.1: Forms and Point Groups
- 10.5.2: Characteristics of Crystals Belonging to the Different Crystal Systems