Raman crystallography

  • How does Raman spec work?

    It is based upon the interaction of light with the chemical bonds within a material.
    Raman is a light scattering technique, whereby a molecule scatters incident light from a high intensity laser light source..

  • What is Raman effect in crystal?

    discussed by Fermi & Rasetti (1931).
    They found that the Raman effect in rock-salt. crystals consists of a continuous background with peaks superimposed, and they. developed the theory from the standpoint of ordinary lattice dynamics to a stage..

  • What is Raman spectroscopy in crystallization?

    Raman spectroscopy is a powerful tool that has been used to follow crystal polymorph conversion (23) and probe the formation of semiordered solution during a secondary (contact) nucleation (24)..

  • What is Raman used for?

    Raman is used for microscopic analysis
    Such analysis is possible using a Raman microscope.
    A Raman microscope couples a Raman spectrometer to a standard optical microscope, allowing high magnification visualization of a sample and Raman analysis with a microscopic laser spot..

  • What is the difference between Raman and XRD?

    XRD works by emitting x-rays and using Bragg's law, while Raman spectroscopy uses Raman scattering.
    Raman can reveal vibration frequencies, while XRD measures long range order.
    Raman can help determine crystal symmetry, but may not provide the complete crystal structure..

  • Raman scattered light is typically collected and either dispersed by a spectrograph or used with an interferometer for detection by Fourier Transform (FT) methods.
    In many cases commercially available FT-IR spectrometers can be modified to become FT-Raman spectrometers.
  • Theory.
    The magnitude of the Raman effect correlates with polarizability of the electrons in a molecule.
    It is a form of inelastic light scattering, where a photon excites the sample.
Raman crystallography is the application of group theory and Raman polarization selection rules to the study and characterization of crystalline materials. Characterizing crystalline materials by Raman spectroscopy is a good alternative when sample size or structure precludes one from doing so by X-ray diffraction.
Raman crystallography is the application of group theory and Raman polarization selection rules to the study and characterization of crystalline materials. Characterizing crystalline materials by Raman spectroscopy is a good alternative when sample size or structure precludes one from doing so by X-ray diffraction.

Conclusions

The theoretical basis for P/O micro-Raman spectroscopy has been discussed

References

(1) F. Adar, Spectroscopy27(2), 16 (2012). (2) E.A. Wood, Crystals and Light: An Introduction to Optical Crystallography(D. Van Nostrand, Princeton

Can polarized Raman spectroscopy detect crystallographic orientation?

The symmetry-dependent Raman tensor allows the detection of crystallographic orientation of materials by using polarization information

In this Perspective, we discuss polarized Raman spectroscopy as a powerful tool for determination of the crystallographic orientation of various materials

What is Raman crystallography?

Raman crystallography is the application of Raman spectroscopy to single crystals

This technique has been applied to a variety of protein molecules where it has provided unique information about biopolymer folding, substrate binding, and catalysis

Here, we describe the application of Raman crystallography to functional RNA molecules

What is Raman spectroscopy used for?

In addition, Raman spectroscopy can also be used for the characterization of the atomic structure of solids because Raman scattering depends on the polarization and direction of the incident light, the crystal symmetry and orientation of the solid sample, and the direction and polarization of the collected scattered light

Raman crystallography is the application of group theory and Raman polarization selection rules to the study and characterization of crystalline materials. Characterizing crystalline materials by Raman spectroscopy is a good alternative when sample size or structure precludes one from doing so by X-ray diffraction.

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