Minerals

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One Type of Asbestos

5. Silicates are the most important mineral group

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Tectosilicates - Three-Dimensional Networks

Quartz Feldspars

5. Silicates are the most important mineral group

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Making Sense of Crystals

6. Crystals are determined by mathematical rules called symmetry

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Unit Cells

All repeating patterns can be described in terms of repeating boxes

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The problem in Crystallography is to reason from the outward shape to the unit cell

6. Crystals are determined by mathematical rules called symmetry

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Which Shape Makes Each Stack?

Crystals are determined by mathematical rules called symmetry

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Stacking Cubes

6. Crystals are determined by mathematical rules called symmetry

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6. Crystals are determined by mathematical rules called symmetry

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6. Crystals are determined by mathematical rules called symmetry

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6. Crystals are determined by mathematical rules called symmetry

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Some shapes that result from stacking cubes

6. Crystals are determined by mathematical rules called symmetry

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Symmetry – the rules behind the shapes

6. Crystals are determined by mathematical rules called symmetry

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Symmetry – the rules behind the shapes

6. Crystals are determined by mathematical rules called symmetry

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The Crystal Classes

6. Crystals are determined by mathematical rules called symmetry

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Take-Away Points

Chemical elements form in stars

Atoms bond by sharing electrons

Minerals are classified by their chemistry

Minerals can be identified by their physical properties = atomic structure