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Objective By the end of this section you should be able to draw a simple crystal structure projection

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Crystal Structure Projections Another way of describing structures Make drawings of a structure projected down one axis onto a unit cell face b a ORIGIN

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Procedure Decide which plane to use Draw scaled, labelled picture of plane Take coordinates and plot e.g. cubic system - plot any plane, say ab Label origin and x and y axes Plot points in x and y Label each height, z Remember to include atoms at all edges and corners i.e., an atom at (0,0,0) should also be at (1,0,0) (0,1,0) and (0,0,1) (i.e. remember the next unit cell along) b a ORIGIN

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Example 1 - Rocksalt

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Try Examples

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Example 2 - Zinc Blende (Sphalerite)

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Example 3 - Fluorite structure

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