Crystal Structure

This image is a computer-generated representation of a complex crystal structure, likely a layered silicate or similar mineral. It features a network of octahedra and tetrahedra outlined in green lines with red points at the vertices, which may represent oxygen atoms. Cyan lines connect these points, likely indicating silicon atoms in tetrahedral coordination with oxygen. This framework forms a repeating, layered pattern that is characteristic of many silicate minerals. The image's perspective gives an impression of depth, with the layers receding into the background, providing a sense of the three-dimensional arrangement of the atoms within the structure. The visual complexity of the image suggests it may be used for advanced scientific analysis or education in the field of crystallography or materials science.

Below are the unit cells for a number of crystals that we have studied using EXAFS (Extended X-ray absorption fine structure). Some are given in stereo projection with an angle of -2 degrees. Cross your eyes slightly to view them in 3-D.
NSF support: DMR007186, DMR0301971

Cage Structures

Skutterudite

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Clathrate – structure showing cages as solid polyhedra

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Clathrate – transparent to show “guest” atoms inside cages
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Clathrate – transparent to show “guest” atoms inside cages

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Clathrate – structure showing cages as solid polyhedra
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Clathrate – structure showing cages as solid polyhedra

Clathrate Cage Structure – 20 atoms in smaller cage; 24 atoms in larger

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Clathrate Cage Structure – 20 atoms in smaller cage; 24 atoms in larger
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Clathrate Cage Structure – 20 atoms in smaller cage; 24 atoms in larger

Perovskites

Perovskite Structure

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CaMnO3 (Norby Structure)

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CaMnO3 (Norby Structure)
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CaMnO3 (Norby Structure)

Double Layer Perovskite Structure

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Double Layer Perovskite Structure
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Double Layer Perovskite Structure

Bilayer Within the Double Layer Perovskite

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Copper Sulfides

CuS

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CuS double layer

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Cu2S (Chalcocite)

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Pyrochlores

Pyrochlore

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Pyrochlore

Pyrochlore, A-site

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A-site Details

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Pyrochlore, B-site

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B-site Details

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Miscellaneous

YBCO

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ZrW2O8 Structure – Corner-linked WO4 tetrahedra and ZrO6 octahedra

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