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- Luca Bindi
- Museo di Storia Naturale, Sezione di Mineralogia, Università degli Studi di Firenze, Firenze I-50121, Italy.
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- Paul J. Steinhardt
- Princeton Center for Theoretical Science, and Joseph Henry Laboratories, Department of Physics, Princeton University, Princeton, NJ 08544, USA.
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- Nan Yao
- Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, NJ 08544, USA.
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- Peter J. Lu
- Department of Physics and School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
書誌事項
- 公開日
- 2009-06-05
- DOI
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- 10.1126/science.1170827
- 公開者
- American Association for the Advancement of Science (AAAS)
この論文をさがす
説明
<jats:title>Forbidden Crystals</jats:title> <jats:p> In crystalline materials, a unit cell is replicated in space through a series of rotations, inversions, and reflections. In order to fully fill space, only certain rotational symmetries are allowed. Quasicrystals contain aperiodic tilings of two or more basic shapes that allow these forbidden rotation symmetries. A number of quasicrystalline materials have been synthesized in the lab, including a number of aluminum alloys. <jats:bold> Bindi <jats:italic>et al.</jats:italic> </jats:bold> (p. <jats:related-article xmlns:xlink="http://www.w3.org/1999/xlink" ext-link-type="doi" page="1306" related-article-type="in-this-issue" vol="324" xlink:href="10.1126/science.1170827">1306</jats:related-article> ) examined samples of the mineral khatyrkite, with a nominal composition of (Cu,Zn)Al <jats:sub>2</jats:sub> . A number of quasicrystalline grains with composition similar to synthetically formed materials were observed. Thus, quasicrystals can form in nature under geological conditions. </jats:p>
収録刊行物
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- Science
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Science 324 (5932), 1306-1309, 2009-06-05
American Association for the Advancement of Science (AAAS)