• DocumentCode
    3445213
  • Title

    Present Status of the a Vogadro Constant Determination from Silicon Crystals with Natural Isotopic Composition

  • Author

    Fujii, K. ; Waseda, A. ; Kuramoto, N. ; Mizushima, S. ; Becker, P. ; Bettin, H. ; Nicolaus, A. ; Kuetgens, U. ; Valkiers, S. ; Taylor, P. ; De Bièvre, P. ; Mana, G. ; Massa, E. ; Matyi, R.

  • Author_Institution
    Nat. Metrol. Inst. of Japan, Ibaraki
  • fYear
    2004
  • fDate
    38139
  • Firstpage
    143
  • Lastpage
    144
  • Abstract
    The determination of the Avogadro constant from two selected silicon crystals is described. The density, molar mass, and lattice spacing of the two crystals were measured at NMU, PTB, IRMM, IMGC, and NIST. When all the data are combined, it leads to the Avogadro constant of 6.022 1353 (21) times 1023 mol-1 with a relative combined standard uncertainty of 3.4 times 10-7
  • Keywords
    lattice constants; silicon; Avogadro constant determination; Si; natural isotopic composition; relative combined standard uncertainty; silicon crystals; Composite materials; Covariance matrix; Crystals; Density measurement; Lattices; Least squares approximation; Metrology; NIST; Pressure measurement; Silicon;
  • fLanguage
    English
  • Publisher
    ieee
  • Conference_Titel
    Precision Electromagnetic Measurements Digest, 2004 Conference on
  • Conference_Location
    London
  • Print_ISBN
    0-7803-8494-6
  • Electronic_ISBN
    0-7803-8494-6
  • Type

    conf

  • DOI
    10.1109/CPEM.2004.305501
  • Filename
    4097156
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=3445213