P Becker et al 2003 Metrologia 40 271 doi:10.1088/0026-1394/40/5/010
Determination of the Avogadro constant via the silicon route
P Becker1, H Bettin1, H-U Danzebrink1, M Gläser1, U Kuetgens1, A Nicolaus1, D Schiel1, P De Bièvre2, S Valkiers2 and P Taylor2
Show affiliationsA value for the Avogadro constant, NA, was derived from new measurements of the lattice parameter, the density and the molar mass of a silicon single crystal. The result NA = 6.022 135 3 × 1023 mol−1 has a relative measurement uncertainty 
and is in excellent agreement with other published data based on the x-ray crystal density molar mass method, indicating the high repeatability of these experiments. The value differs significantly from the Committee on Data for Science and Technology's most recent recommended value of 6.022 141 99 × 1023 mol−1 by more than 1 × 10−6 NA.
- PACS
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61.50.Ah Theory of crystal structure, crystal symmetry; calculations and modeling
06.30.Bp Spatial dimensions (e.g., position, lengths, volume, angles, and displacements)
- Subjects
- Dates
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Issue 5 (October 2003)
Received 9 May 2003
Published 11 September 2003
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Determination of the Avogadro constant via the silicon route
P Becker et al 2003 Metrologia 40 271
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