Evaluation of the molar volume of silicon crystals for a determination of the Avogadro constant

摘要

For a determination of the Avogadro constant NA by the x-ray crystal density (XRCD) method, the molar volume M/ρ of three different silicon crystals, NRLM1, NRLM2, and NRLM4, have been analyzed systematically by measurements of their densities p and molar masses M. Details on the sample preparations and the result of measurement are presented.