File:Britannica Flor-spar Cube.png
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English: Fluor-spar crystallizes in the cubic system, commonly in cubes, either alone or combined with the octahedron, rhombic dodecahedron, four-faced cube, &c. The four-faced cube has been called the fluoroid. In this figure, a is the cube (100), a' the rhombic dodecahedron (110), and f the four-faced cube (310). |
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| Date | published 1911 | |||
| Source | Encyclopædia Britannica, 11th ed., Vol. 10, p. 578 | |||
| Author | Unknown author | |||
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| current | 23:07, 26 July 2009 | | 296 × 299 (6 KB) | Bob Burkhardt (talk | contribs) | {{Information |Description={{en|1=Fluor-spar crystallizes in the cubic system, commonly in cubes, either alone or combined with the octahedron, rhombic dodecahedron, four-faced cube, &c. The four-faced cube has been called the fluoroid. In this figure, '' |
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