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<p>Professor Alan Mackay died on 24th February 2025, aged 98 This series of recollections covers the period around 1975 when he worked on tiling patterns using pentagons and met with Roger Penrose, the discoverer of the first aperiodic tiling pattern using only two shapes of tiles. The creation of a computer program to draw the Penrose pattern allowed for the derivation of a diffraction pattern showing ten-fold symmetry, preceding the actual discovery of quasi-crystals by Dan Shechtman a few years later.</p>

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Quasi-crystals — the early years

  • 期刊论文

  • 发表日期：

    2025年5月11日

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  • Bob Mackay

摘要

Professor Alan Mackay died on 24th February 2025, aged 98 This series of recollections covers the period around 1975 when he worked on tiling patterns using pentagons and met with Roger Penrose, the discoverer of the first aperiodic tiling pattern using only two shapes of tiles. The creation of a computer program to draw the Penrose pattern allowed for the derivation of a diffraction pattern showing ten-fold symmetry, preceding the actual discovery of quasi-crystals by Dan Shechtman a few years later.