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Journal of the Optical Society of America

Journal of the Optical Society of America

  • Vol. 43, Iss. 9 — Sep. 1, 1953
  • pp: 747–749

Multiple-Beam Fringes of Equal Chromatic Order. Part III. The Cleavage of Topaz

W F. KOEHLER and A. EBERSTEIN  »View Author Affiliations

JOSA, Vol. 43, Issue 9, pp. 747-749 (1953)

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Fringes of equal chromatic order were formed by the film between a silvered cleavage face and a partially silvered optical flat. Crystal cleavage steps were determined from measurements of fringe steps. The b dimension of the unit cell was determined by a method of successive approximations to be 8.81±40.07A which agrees with the x-ray value within the experimental error.

W F. KOEHLER and A. EBERSTEIN, "Multiple-Beam Fringes of Equal Chromatic Order. Part III. The Cleavage of Topaz," J. Opt. Soc. Am. 43, 747-749 (1953)

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  1. Manne Siegbahn, Ark. Mat., Astron. Fysik., 23A, No. 12 (1933),
  2. S. Tolansky, Nature 153, 435 (1944).
  3. Wheeler P. Davy, A Study of Crystal Structure and Its Application (McGraw-Hill Book Company, Inc., New York, 1934), pp. 347.
  4. S. Tolansky and A. Khamsavi, Nature 157, 661 (1946).
  5. S. Tolansky, Proc. Roy. Soc. (London) 184A, 51 (1945).

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