Abstract

The intensity of Raman lines of small crystals can be appreciably enhanced by placing them in a liquid with equal, or nearly equal, refractive index. This technique usually gives better results than the hollow-cone method used with powders, especially with optically isotropic samples, provided small crystals (2–4 mm in size) can be obtained. In certain cases, the results are comparable to those obtained with much larger single crystals.

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  1. D. A. Dows, J. Chim. Phys. 63, 168 (1966).
  2. R. Savoie and A. Anderson, J. Opt. Soc. Am. 55, 133 (1965).
  3. J. Ferraro, G. Mack, and J. Ziomek, Spectrochim. Acta 17, 802 (1961).
  4. M. Tobin, J. Opt. Soc. Am. 49, 850 (1959).
  5. A. Simon, H. Kriegsmann, and E. Stiger, Z. Physik. Chem. (Leipzig) 205, 181 (1956).
  6. A. V. Bobrov and Kh. E. Sterin, Opt. i Spektroskopiya 17, 532 (1964); Opt. Spectry. 17, 287 (1964).
  7. R. H. Busey and O. L. Keller, Jr., J. Chem. Phys. 41, 215 (1964).
  8. R. N. Jones and M. K. Jones, Anal. Chem. 38, 393R (1966).
  9. R. Loudon, Advan. Phys. 13, 423 (1964).
  10. A. C. Jones and D. D. Tunnicliff, Anal. Chem. 34, 261R (1962).
  11. J. P. Russell, J. Physique 26, 620 (1965).
  12. S. P. S. Porto, B. Tell, and T. C. Damen, Phys. Rev. Letters 16, 450 (1966).
  13. Unless otherwise specified, refractive indices are for sodium light (5893 Å), at 20°C, and were taken from R. C. Weast, Ed., The Handbook of Chemistry and Physics (The Chemical Rubber Publishing Co., Cleveland, 1965–1966), 46th ed.
  14. J. L. Cojan and A. Renaux, Comp. Rend. 247, 1111 (1958).
  15. M. F. Crawford, H. L. Welsh, and J. H. Harrold, Can. J. Phys. 30, 81 (1952).
  16. N. Thon, Ed., Annual Tables of Physical Constants and Numerical Data (National Research Council, Frick Chemical Laboratory, Princeton, 1941), Sec. 921C.
  17. N. Bauer, Technique of Organic Chemistry (Interscience Publishers, Inc., New York, 1949), 2nd ed., Vol. I, Pt. II, p. 1153.
  18. R. N. Jones, J. B. DiGiorgio, J. J. Elliot, and G. A. A. Nonenmacher, J. Org. Chem. 30, 1822 (1965).
  19. C. W. Bunn, Chemical Crystallography (Clarendon Press, Oxford, 1961), 2nd ed., p. 375.
  20. T. E. Gibb, Optical Methods of Chemical Analysis (McGraw—Hill Book Co., New York, 1942).
  21. A. Anderson and R. Savoie, J. Chem. Phys. 43, 3468 (1965).
  22. A. Cabana, A. Anderson, and R. Savoie, J. Chem. Phys. 42, 1122 (1965).

Anderson, A.

R. Savoie and A. Anderson, J. Opt. Soc. Am. 55, 133 (1965).

A. Anderson and R. Savoie, J. Chem. Phys. 43, 3468 (1965).

A. Cabana, A. Anderson, and R. Savoie, J. Chem. Phys. 42, 1122 (1965).

Bauer, N.

N. Bauer, Technique of Organic Chemistry (Interscience Publishers, Inc., New York, 1949), 2nd ed., Vol. I, Pt. II, p. 1153.

Bobrov, A. V.

A. V. Bobrov and Kh. E. Sterin, Opt. i Spektroskopiya 17, 532 (1964); Opt. Spectry. 17, 287 (1964).

Bunn, C. W.

C. W. Bunn, Chemical Crystallography (Clarendon Press, Oxford, 1961), 2nd ed., p. 375.

Busey, R. H.

R. H. Busey and O. L. Keller, Jr., J. Chem. Phys. 41, 215 (1964).

Cabana, A.

A. Cabana, A. Anderson, and R. Savoie, J. Chem. Phys. 42, 1122 (1965).

Cojan, J. L.

J. L. Cojan and A. Renaux, Comp. Rend. 247, 1111 (1958).

Crawford, M. F.

M. F. Crawford, H. L. Welsh, and J. H. Harrold, Can. J. Phys. 30, 81 (1952).

Damen, T. C.

S. P. S. Porto, B. Tell, and T. C. Damen, Phys. Rev. Letters 16, 450 (1966).

DiGiorgio, J. B.

R. N. Jones, J. B. DiGiorgio, J. J. Elliot, and G. A. A. Nonenmacher, J. Org. Chem. 30, 1822 (1965).

Dows, D. A.

D. A. Dows, J. Chim. Phys. 63, 168 (1966).

Elliot, J. J.

R. N. Jones, J. B. DiGiorgio, J. J. Elliot, and G. A. A. Nonenmacher, J. Org. Chem. 30, 1822 (1965).

Ferraro, J.

J. Ferraro, G. Mack, and J. Ziomek, Spectrochim. Acta 17, 802 (1961).

Gibb, T. E.

T. E. Gibb, Optical Methods of Chemical Analysis (McGraw—Hill Book Co., New York, 1942).

Harrold, J. H.

M. F. Crawford, H. L. Welsh, and J. H. Harrold, Can. J. Phys. 30, 81 (1952).

Jones, A. C.

A. C. Jones and D. D. Tunnicliff, Anal. Chem. 34, 261R (1962).

Jones, M. K.

R. N. Jones and M. K. Jones, Anal. Chem. 38, 393R (1966).

Jones, R. N.

R. N. Jones and M. K. Jones, Anal. Chem. 38, 393R (1966).

R. N. Jones, J. B. DiGiorgio, J. J. Elliot, and G. A. A. Nonenmacher, J. Org. Chem. 30, 1822 (1965).

Keller, Jr., O. L.

R. H. Busey and O. L. Keller, Jr., J. Chem. Phys. 41, 215 (1964).

Kriegsmann, H.

A. Simon, H. Kriegsmann, and E. Stiger, Z. Physik. Chem. (Leipzig) 205, 181 (1956).

Loudon, R.

R. Loudon, Advan. Phys. 13, 423 (1964).

Mack, G.

J. Ferraro, G. Mack, and J. Ziomek, Spectrochim. Acta 17, 802 (1961).

Nonenmacher, G. A. A.

R. N. Jones, J. B. DiGiorgio, J. J. Elliot, and G. A. A. Nonenmacher, J. Org. Chem. 30, 1822 (1965).

Porto, S. P. S.

S. P. S. Porto, B. Tell, and T. C. Damen, Phys. Rev. Letters 16, 450 (1966).

Renaux, A.

J. L. Cojan and A. Renaux, Comp. Rend. 247, 1111 (1958).

Russell, J. P.

J. P. Russell, J. Physique 26, 620 (1965).

Savoie, R.

R. Savoie and A. Anderson, J. Opt. Soc. Am. 55, 133 (1965).

A. Anderson and R. Savoie, J. Chem. Phys. 43, 3468 (1965).

A. Cabana, A. Anderson, and R. Savoie, J. Chem. Phys. 42, 1122 (1965).

Simon, A.

A. Simon, H. Kriegsmann, and E. Stiger, Z. Physik. Chem. (Leipzig) 205, 181 (1956).

Sterin, Kh. E.

A. V. Bobrov and Kh. E. Sterin, Opt. i Spektroskopiya 17, 532 (1964); Opt. Spectry. 17, 287 (1964).

Stiger, E.

A. Simon, H. Kriegsmann, and E. Stiger, Z. Physik. Chem. (Leipzig) 205, 181 (1956).

Tell, B.

S. P. S. Porto, B. Tell, and T. C. Damen, Phys. Rev. Letters 16, 450 (1966).

Tobin, M.

M. Tobin, J. Opt. Soc. Am. 49, 850 (1959).

Tunnicliff, D. D.

A. C. Jones and D. D. Tunnicliff, Anal. Chem. 34, 261R (1962).

Welsh, H. L.

M. F. Crawford, H. L. Welsh, and J. H. Harrold, Can. J. Phys. 30, 81 (1952).

Ziomek, J.

J. Ferraro, G. Mack, and J. Ziomek, Spectrochim. Acta 17, 802 (1961).

Other (22)

D. A. Dows, J. Chim. Phys. 63, 168 (1966).

R. Savoie and A. Anderson, J. Opt. Soc. Am. 55, 133 (1965).

J. Ferraro, G. Mack, and J. Ziomek, Spectrochim. Acta 17, 802 (1961).

M. Tobin, J. Opt. Soc. Am. 49, 850 (1959).

A. Simon, H. Kriegsmann, and E. Stiger, Z. Physik. Chem. (Leipzig) 205, 181 (1956).

A. V. Bobrov and Kh. E. Sterin, Opt. i Spektroskopiya 17, 532 (1964); Opt. Spectry. 17, 287 (1964).

R. H. Busey and O. L. Keller, Jr., J. Chem. Phys. 41, 215 (1964).

R. N. Jones and M. K. Jones, Anal. Chem. 38, 393R (1966).

R. Loudon, Advan. Phys. 13, 423 (1964).

A. C. Jones and D. D. Tunnicliff, Anal. Chem. 34, 261R (1962).

J. P. Russell, J. Physique 26, 620 (1965).

S. P. S. Porto, B. Tell, and T. C. Damen, Phys. Rev. Letters 16, 450 (1966).

Unless otherwise specified, refractive indices are for sodium light (5893 Å), at 20°C, and were taken from R. C. Weast, Ed., The Handbook of Chemistry and Physics (The Chemical Rubber Publishing Co., Cleveland, 1965–1966), 46th ed.

J. L. Cojan and A. Renaux, Comp. Rend. 247, 1111 (1958).

M. F. Crawford, H. L. Welsh, and J. H. Harrold, Can. J. Phys. 30, 81 (1952).

N. Thon, Ed., Annual Tables of Physical Constants and Numerical Data (National Research Council, Frick Chemical Laboratory, Princeton, 1941), Sec. 921C.

N. Bauer, Technique of Organic Chemistry (Interscience Publishers, Inc., New York, 1949), 2nd ed., Vol. I, Pt. II, p. 1153.

R. N. Jones, J. B. DiGiorgio, J. J. Elliot, and G. A. A. Nonenmacher, J. Org. Chem. 30, 1822 (1965).

C. W. Bunn, Chemical Crystallography (Clarendon Press, Oxford, 1961), 2nd ed., p. 375.

T. E. Gibb, Optical Methods of Chemical Analysis (McGraw—Hill Book Co., New York, 1942).

A. Anderson and R. Savoie, J. Chem. Phys. 43, 3468 (1965).

A. Cabana, A. Anderson, and R. Savoie, J. Chem. Phys. 42, 1122 (1965).

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