File:Crystallography Haüy integrant molecules form pentagonal dodecahedron of pyrite 1801.jpg
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:41, 16 May 2018 | | 1,800 × 1,709 (304 KB) | commons>Mary Mark Ockerbloom | == {{int:filedesc}} == {{Artwork |artist = |author = Haüy, René Just, 1743-1822. |title = Figure from ''Traité de minéralogie'' (1801) |Description ={{en|1= The piling of the cubic `integrant molecules' which forms the pentagonal dodecahedron of pyrite. Notice the decrescence of the molecular lamellae in the proportion of 2:1, which leads to an interfacial angle at pq of 126° 52′ 12″, closely corresponding to that of the empirical crystal, viz 127° 56′ 08″ (Haüy, R.-J. ''Traité de... |
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