Title :
The molar volume of silicon [Avogadro constant]
Author :
De Bievre, P. ; Valkiers, Staf ; Gonfiantini, Roberto ; Taylor, Philip D P ; Bettin, Horst ; Spieweck, Frank ; Peuto, Anna ; Pettorruso, Savino ; Mosca, Mario ; Fujii, Ken-ichi ; Tanaka, Mitsuru ; Nezu, Yoshiaki ; Leistner, Achim J. ; Giard, Walter J.
Author_Institution :
Inst. for Reference Mater. & Meas., Joint Res. Center, Geel, Belgium
fDate :
4/1/1997 12:00:00 AM
Abstract :
A reevaluation has been made of the density and molar mass data for the silicon single crystals used in three Avogadro projects in which the authors´ institutions are cooperating. A value of 12.058 825(15) cm 3 mol-1 at 22.5°C was obtained for the ratio M(Si)/ρ(Si), which is considered our present best estimate of the silicon molar volume. This implies for the Avogadro constant a value of 6.022 137 8(75)×1023 mol-1, with a relative difference of (2±12)×10-7 with respect to the value published by Seyfried et al. (1992)
Keywords :
constants; density measurement; elemental semiconductors; lattice constants; measurement errors; silicon; 22.5 C; Avogadro constant; Si; density; lattice parameter; molar mass; molar volume; uncertainty; Atomic measurements; Australia; Crystalline materials; Crystals; Density measurement; Laboratories; Lattices; Manufacturing; Silicon; Volume measurement;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
