Abstract

A selective decrease in the spectral transmittance of cleaved LiF crystals at wavelengths shorter than 1600 Å has been observed when they are exposed to the atmosphere. The decrease is attributed to a surface layer produced on the crystals by reaction with moisture. It can be substantially inhibited by immediate post-cleavage storage in dry gas or in vacuum. Optical-quality thin plates of currently available, commercial hard-to-cleave LiF that is softer than LiF previously manufactured can be obtained by first hardening the crystal with x rays, cleaving the plates, and then thermally annealing out the optical effects of the x rays.

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  1. R. Kato, S. Nakashima, K. Nakamura, and Y. Uchida, J. Phys. Soc. Japan 15, 2111 (1960).
  2. Harshaw Chemical Company, 1945 East 97th St., Cleveland 6, Ohio.
  3. K. E. Lennard-Jones and B. M. Dent, Trans. Faraday Soc. 24, 92 (1928).
  4. K. LeHovec, J. Chem. Phys. 21, 1123 (1953).
  5. J. J. Gilman and W. G. Johnston, GE Rept. No. 57-RI-1662, January 1957.
  6. G. Jobst, Ann. Physik 78, 157 (1925); V. K. Lamer, J. Phys. Colloid Chem. 52, 65 (1958).
  7. J. Rolfe, Phys. Rev. Letters 1, 56 (1958); F. E. Pretzel, G. N. Rupert, C. L. Mader, E. K. Storms, G. V. Gritton, and C. C. Rushing, J. Phys. Chem. Solids 16, 10 (1960).
  8. G. Hass and R. Tousey, J. Opt. Soc. Am. 49, 593 (1959).
  9. At Naval Research Laboratory by W. Zimmerman, a former member of Crystal Branch, Solid State Division.
  10. J. S. Nadeau and W. G. Johnson, J. Appl. Phys. 32, 2563 (1961).

Dent, B. M.

K. E. Lennard-Jones and B. M. Dent, Trans. Faraday Soc. 24, 92 (1928).

Gilman, J. J.

J. J. Gilman and W. G. Johnston, GE Rept. No. 57-RI-1662, January 1957.

Hass, G.

G. Hass and R. Tousey, J. Opt. Soc. Am. 49, 593 (1959).

Jobst, G.

G. Jobst, Ann. Physik 78, 157 (1925); V. K. Lamer, J. Phys. Colloid Chem. 52, 65 (1958).

Johnson, W. G.

J. S. Nadeau and W. G. Johnson, J. Appl. Phys. 32, 2563 (1961).

Johnston, W. G.

J. J. Gilman and W. G. Johnston, GE Rept. No. 57-RI-1662, January 1957.

Kato, R.

R. Kato, S. Nakashima, K. Nakamura, and Y. Uchida, J. Phys. Soc. Japan 15, 2111 (1960).

LeHovec, K.

K. LeHovec, J. Chem. Phys. 21, 1123 (1953).

Lennard-Jones, K. E.

K. E. Lennard-Jones and B. M. Dent, Trans. Faraday Soc. 24, 92 (1928).

Nadeau, J. S.

J. S. Nadeau and W. G. Johnson, J. Appl. Phys. 32, 2563 (1961).

Nakamura, K.

R. Kato, S. Nakashima, K. Nakamura, and Y. Uchida, J. Phys. Soc. Japan 15, 2111 (1960).

Nakashima, S.

R. Kato, S. Nakashima, K. Nakamura, and Y. Uchida, J. Phys. Soc. Japan 15, 2111 (1960).

Rolfe, J.

J. Rolfe, Phys. Rev. Letters 1, 56 (1958); F. E. Pretzel, G. N. Rupert, C. L. Mader, E. K. Storms, G. V. Gritton, and C. C. Rushing, J. Phys. Chem. Solids 16, 10 (1960).

Tousey, R.

G. Hass and R. Tousey, J. Opt. Soc. Am. 49, 593 (1959).

Uchida, Y.

R. Kato, S. Nakashima, K. Nakamura, and Y. Uchida, J. Phys. Soc. Japan 15, 2111 (1960).

Zimmerman, W.

At Naval Research Laboratory by W. Zimmerman, a former member of Crystal Branch, Solid State Division.

Other

R. Kato, S. Nakashima, K. Nakamura, and Y. Uchida, J. Phys. Soc. Japan 15, 2111 (1960).

Harshaw Chemical Company, 1945 East 97th St., Cleveland 6, Ohio.

K. E. Lennard-Jones and B. M. Dent, Trans. Faraday Soc. 24, 92 (1928).

K. LeHovec, J. Chem. Phys. 21, 1123 (1953).

J. J. Gilman and W. G. Johnston, GE Rept. No. 57-RI-1662, January 1957.

G. Jobst, Ann. Physik 78, 157 (1925); V. K. Lamer, J. Phys. Colloid Chem. 52, 65 (1958).

J. Rolfe, Phys. Rev. Letters 1, 56 (1958); F. E. Pretzel, G. N. Rupert, C. L. Mader, E. K. Storms, G. V. Gritton, and C. C. Rushing, J. Phys. Chem. Solids 16, 10 (1960).

G. Hass and R. Tousey, J. Opt. Soc. Am. 49, 593 (1959).

At Naval Research Laboratory by W. Zimmerman, a former member of Crystal Branch, Solid State Division.

J. S. Nadeau and W. G. Johnson, J. Appl. Phys. 32, 2563 (1961).

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