Are interplanetary grains crystalline?

  • S. Drapatz
  • K. W. Michel
5 Dynamics and Evolution
Part of the Lecture Notes in Physics book series (LNP, volume 48)


The optical properties of interplanetary grains depend not only on chemical composition, size, and shape but also on lattice defects. It is argued that practically all sources for the zodiacal dust cloud yield grains with highly disturbed crystal structure. Healing of these defects can occur when the grains are heated in the vicinity of the sun ≤ 0.1 AU) and various orbits are considered, on which annealed grains with nearly perfect crystal structure can return to larger heliocentric distances to reveal the sharp optical features of cold well-ordered crystals. However, we do not find any processes, which produce healed particles of sufficient number to affect the properties of the general zodiacal cloud. Therefore, the optical properties of interplanetary grains are determined by a high degree of lattice perturbation.


Solar Wind Radiation Pressure Solar Wind Pressure Perihelion Distance Hyperbolic Orbit 
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  1. Allen, C.W.A., Astrophysical Quantities, Athlone Press (1973)Google Scholar
  2. Biermann, L., private communication (1975)Google Scholar
  3. Dohnanyi, J.S., this volume. 1976Google Scholar
  4. Drapatz, S., and K.W. Michel, Z. Naturf. 29a, 870 (1974) Drapatz, S., and K.W. Michel, Workshop on Interstellar Grains, Gregynog Hall, Wales (1975)Google Scholar
  5. Elsässer, H., NASA SP-150 p. 287 (1967)Google Scholar
  6. Gault, D.E., et al., NASA TN D-1767 (1963)Google Scholar
  7. Harwit, M., J. Geophys. Res. 68, 2171 (1963)Google Scholar
  8. Hines, R.L., Phys. Rev. 120, 1626 (1960)Google Scholar
  9. Huffman, D.R., private communication (1975)Google Scholar
  10. Lamy, Ph.L., Astr. Astrophys. 33, 191 (1974)Google Scholar
  11. Perry, C.H., et al., The Moon 4, 315 (1972)Google Scholar
  12. Pollack, J.B., et al., Icarus 19, 372 (1973)Google Scholar
  13. Schott. “Schott-Zerodur”, Mainz (1971)Google Scholar
  14. Wetherill, G.W., J. Geophys. Res. 72, 2429 (1967)Google Scholar
  15. Wigley, D.A., “Mechanical Properties of Material at Low Temperatures” Plenum Press N.Y. (1971)Google Scholar
  16. Vaghi, S., Astron. and Astrophys. 24, 107 (1973)Google Scholar
  17. Zook, H.A., and O.E. Berg, Planet. Space Sci. 23, 183 (1975)Google Scholar

Copyright information

© Springer-Verlag 1976

Authors and Affiliations

  • S. Drapatz
    • 1
  • K. W. Michel
    • 1
  1. 1.Max-Planck-Institut für Physik und AstrophysikInstitut für extraterrestrische PhysikGarchingW.-Germany

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