| 11. | They are self-intersecting surfaces isometric to an octahedron.
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| 12. | A octahedron shares edges with two octahedra and one tetrahedron.
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| 13. | This site is surrounded by a distorted octahedron of six oxygen atoms.
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| 14. | Tellurium atoms form a distorted octahedron around the molybdenum atoms.
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| 15. | The intersection of the two forms a regular octahedron.
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| 16. | With this coloring, the octahedron has tetrahedral symmetry.
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| 17. | The tetrahedron, cube, and octahedron all occur naturally in crystal structures.
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| 18. | During the Octahedron tour, the show on October 23 in Dave Elitch.
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| 19. | It can be decomposed into two equal regular tetrahedra and a regular octahedron.
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| 20. | It can be seen as the compound of an octahedron and a cube.
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