Naturally formed epitaxial diamond crystals in rubies
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- Naturally formed epitaxial diamond crystals in rubies
- Park, Gyeong-Su; Bae, Sung Chul; Granick, Steve; Lee, Jang-Ho; Bae, Sang-Duk; Kim, Taekyung; Zuo, J. M.
- Diamond; Epitaxy; Raman spectroscopy; Transmission electron microscopy
- Issue Date
- ELSEVIER SCIENCE SA
- DIAMOND AND RELATED MATERIALS, v.16, no.2, pp.397 - 400
- Materials inspired by nature comprise a running theme of modern science. Among the crystals that can be formed, diamond is perhaps most emblematic. In the conventional thinking, natural diamonds form only under high-pressure and high-temperature conditions. Here we show a new, natural form of diamond crystals of high quality that are epitaxial with their ruby substrate. Diamonds in rubies are rare; heteroepitaxial diamonds are twice as unexpected. Epitaxy suggests that the natural diamonds in the rubies were formed after ruby crystallization in a thermodynamically diamond stable region. This striking natural control over diamond epitaxy suggests a general strategy by which to form naturally-inspired, gem-quality crystals.
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