Determination of the Avogadro constant via the silicon route

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11 September 2003

journal article
Published by IOP Publishing in Metrologia

Vol. 40 (5) , 271-287
https://doi.org/10.1088/0026-1394/40/5/010

Abstract

A value for the Avogadro constant, N_A, was derived from new measurements of the lattice parameter, the density and the molar mass of a silicon single crystal. The result N_A = 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 N_A.

Keywords

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