P. De Biévre, S. Valkiers, S. Peiser, F. Spieweck, H. Bettin, A. Peuto, A. Sacconi, M. Mosca, K. Fujii, M. Tanaka, Y. Nezu
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Experimental determinations of the quantity M//spl rho/ for silicon single crystals used in the determination of the Avogadro constant
Considerable improvements in the measurements of the molar mass M(Si) of silicon crystals combined with high-accuracy densities (/spl rho/) of the same crystals, have yielded experimental M(Si)//spl rho/ values resulting from the PTB-IRMM, the IMGC-IRMM and the NRLM-IRMM projects for the redetermination of Avogadro's Constant. These M(Si)//spl rho/ values are compared with attributed uncertainties, in relation to the supposition of constancy M(Si)//spl rho/ for silicon.<>