Lattice Spacing Measurements and Avogadro’s Number

  • M. Hart
  • I. G. Morgan
Conference paper


The present unsatisfactory situation concerning the value of Avogadro’s number has been briefly discussed by the authors in an earlier paper (1) in which was described a proposed method of direct measurement based on a new technique of X-ray interferometry (2,3) which provides a means for absolute determination of the lattice spacing of crystals.


Silicon Crystal Double Crystal Zebra Pattern Optical Interferometry Extinction Depth 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    HART, M., MILNE, A.D., MORGAN, I. and CURTIS, I., International Conference on Precision Measurement and Fundamental Constants, National Bureau of Standards, U.S.A. 1970.Google Scholar
  2. 2.
    BONSE, U. and HART, M., Appl. Phys. Lett., 6, 155 (1965).ADSCrossRefGoogle Scholar
  3. 3.
    HART, M., J. Phys. D, 1, 1405 (1968).ADSCrossRefGoogle Scholar
  4. 4.
    COOK, A.H., Phil. Trans. Roy. Soc. (Lend.), A254, 125 (1961).ADSCrossRefGoogle Scholar
  5. 5.
    COOK, A.H. and STONE, N.W.B., Phil. Trans. Roy. Soc. (Lend.), A250, 279 (1957).ADSCrossRefGoogle Scholar
  6. 6.
    HART, M., Science Progress Oxf., 56, 429 (1968).Google Scholar
  7. 7.
    BAKER, J.A., TUCKER, T.M., MOYER, N.E. and BUSCHERT, R.C., J. Appl. Phys., 39, 4365 (1968).ADSCrossRefGoogle Scholar
  8. 8.
    BONSE, U., Z. Physik, 153, 278 (1958).ADSCrossRefGoogle Scholar
  9. 9.
    BONSE, U., Direct observations of imperfections in crystals, John Wiley & Sons, New York, 431.Google Scholar
  10. 10.
    KAISER, W., KECK, P. and LANGE, C., Phys. Rev. 101, 1264 (1956).ADSCrossRefGoogle Scholar
  11. 11.
    BENNINGER, M., Zeit. f. ang. Phys., 19, 20 (1965).Google Scholar
  12. 12.
    HART, M., Proc. Roy. Soc. A309, 281 (1969).ADSCrossRefGoogle Scholar

Copyright information

© Plenum Publishing Company Ltd 1972

Authors and Affiliations

  • M. Hart
    • 1
  • I. G. Morgan
    • 2
  1. 1.Department of PhysicsUniversity of BristolBristolEngland
  2. 2.National Physical LaboratoryTeddington, MiddlesexEngland

Personalised recommendations