. . . . "The threshold crack speed in silicon may be due to a localized phase transformation of the lattice at the crack tip from six-membered rings to a 5-7 double ring." . "mechanism" . . "The speed threshold arises from a 6-ring to 5-7 double-ring transformation at the crack tip" . "Markus J. Buehler et al., “Threshold Crack Speed Controls Dynamical Fracture of Silicon Single Crystals”, Physical Review Letters 99 (2007), doi:10.1103/physrevlett.99.165502; Abstract. Scope: Silicon crack tip, ReaxFF reactive MD" . "Markus J. Buehler, Harvey Tang, Adri C. T. van Duin, William A. Goddard. Threshold Crack Speed Controls Dynamical Fracture of Silicon Single Crystals. Physical Review Letters 99 (2007). doi:10.1103/physrevlett.99.165502" . "Markus J. Buehler, Harvey Tang, Adri C. T. van Duin, William A. Goddard" . "2007"^^ . "doi:10.1103/physrevlett.99.165502" . "pmid:17995264" . "Threshold Crack Speed Controls Dynamical Fracture of Silicon Single Crystals" . . . "delphisci buehler-protein-materials claim extractor" . . . . "Claude Fable 5.1" . . . . . . . . . . . . "Quoted from the published abstract as returned by Europe PMC (2007-silicon-crack.abstract.txt, sha256 738b7efc8c80dd5d2f65952c2668e50f1e5caa3f191aa9d2a7309212a85418f7); the full text was not read (not in Europe PMC open-access subset). Checked by build/check.py." . . . "Here we show that this threshold crack speed may be due to a localized phase transformation of the silicon lattice from 6-membered rings to a 5-7 double ring at the crack tip." . . "738b7efc8c80dd5d2f65952c2668e50f1e5caa3f191aa9d2a7309212a85418f7" . "Checksum of the vendored text file inputs/2007-silicon-crack.abstract.txt, not of the publisher's copy." . . . "Abstract of Threshold Crack Speed Controls Dynamical Fracture of Silicon Single Crystals, as read" . . "buehler-protein-materials" . "2026-11-08T04:38:11.893Z"^^ . . . . . "Markus J. Buehler et al. 2007 claim: The speed threshold arises from a 6-ring to 5-7 double-ring transformation at the crack tip" . . "RSA" . "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAyFHtPB6p0mCjDozxlOY9CmO3nBm7Te3jFbXyLmM+G1tGe47Da0jYIbhkl9Oo1ZjxmCa3LCwlEqK8gj6hEIcL4ahW30JXh9HycfKVk1bugkzMEV15tJdTzAU3sGMFnbNsn43xY2LFLy45tApkRm5byEiM7oRRrooIdwoQKnP4Wzq/bfAoJ9qvW+MGkelyOTd1jbSt+KfmT7xKmDfWzAHddUlWwMX2QJOLxDaffOteTop6ZRgPiNmPJKA/S62Gac9XtSYT3oDkZ6/nr5cxxNLpOyxTf5FPISiCe11xYO/unYjY+mwnOfA8yhJIyx1l0O9I0vpOpn+E5TvyHJV+oSTrvwIDAQAB" . "wZC2C3dspfZeiDDu46yYRo8Ot8AhIIY6CgbEn4SJ6oOTMRRuZy3ARzycRVgh1bfxaUDF4wGA1z+AW2018mHjie4yYokhEjAJ0Exb3iGzGW7DKyHjpWpkzCMJoPr3aRv8EeHLEqFbtxQHtDlWFhOki7VBiLDgVY1HY+ePkJ6q+6oEcb8uvHZ1QdH9JjaXmSUaRxh3e+SX5QwnaRB7zPeLu+iVduk3dTL1rWXY39emyPLcvDAixrcD1nrxswOS/nLcm7J/Yo0F2QTE9ce89/TpL0wdsbZI4jDaBfRhMnNjPV89V8yApUjfa2IyZzeFmSPUFXT5UlNFfWR6+ShOvxk26Q==" . . .