pub const SI_LATTICE_CONSTANT: LatticeConstant;Expand description
Silicon: a = 5.431 020 511(89) x 10^-10 m, in vacuum at 22.5 °C
(295.65 K).
CODATA 2022: P. J. Mohr, D. B. Newell, B. N. Taylor and E. Tiesinga, “CODATA Recommended Values of the Fundamental Physical Constants: 2022”, Rev. Mod. Phys. 97, 025002 (2025), read as arXiv:2409.03787v1, Table XXXIV “Values of some x-ray-related quantities”, p. 56: “lattice parameter of Si (in vacuum, 22.5 °C)”, with the footnote that it is the unit cell edge of an ideal single crystal of naturally occurring Si free of impurities and imperfections. The same value is in the NIST CODATA table (https://physics.nist.gov/cuu/Constants/Table/allascii.txt).