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Related Concept Videos

Raman Spectroscopy: Overview01:20

Raman Spectroscopy: Overview

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The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
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X-ray Diffraction of Biological Samples01:10

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X-ray diffraction or XRD is an analytical tool that utilizes X-rays to study ordered structures such as crystalline organic and inorganic samples, polycrystalline materials, proteins, carbohydrates, and drugs.
According to Bragg's law, when X-rays strike the sample positioned on a stage, the rays are  scattered by the electron clouds around the sample atoms. The  X-ray diffraction or scattering is caused by constructive interference of the X-ray waves that reflect off the internal...
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Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

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A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
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X-ray Crystallography02:18

X-ray Crystallography

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The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
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Interference and Diffraction02:18

Interference and Diffraction

51.9K
Interference is a characteristic phenomenon exhibited by waves. When two electromagnetic waves interact with their peaks and troughs coinciding, a resulting wave with enhanced amplitude is produced. This is known as constructive interference. In this case, the two waves interacting are in phase with each other.
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Short-distance Transport of Resources02:12

Short-distance Transport of Resources

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Short-distance transport refers to transport that occurs over a distance of just 2-3 cells, crossing the plasma membrane in the process. Small uncharged molecules, such as oxygen, carbon dioxide, and water, can diffuse across the plasma membrane on their own. In contrast, ions and larger molecules require the assistance of transport proteins due to their charge or size. Transport across membranes also occurs within individual cells, playing a variety of essential roles for the plant as a whole.
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Updated: Jan 23, 2026

A Novel Technique for Raman Analysis of Highly Radioactive Samples Using Any Standard Micro-Raman Spectrometer
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Raman Open Database: first interconnected Raman-X-ray diffraction open-access resource for material identification.

Yassine El Mendili1, Antanas Vaitkus2, Andrius Merkys2

  • 1Normandie Université, CRISMAT-ENSICAEN, UMR6508 CNRS, Université de Caen Normandie, 6 Boulevard Maréchal Juin, 14050 Caen, France.

Journal of Applied Crystallography
|June 26, 2019
PubMed
Summary
This summary is machine-generated.

A new Raman Open Database (ROD) enhances compound identification by combining Raman spectroscopy and X-ray diffraction (XRD) data. This interconnected database facilitates unambiguous material analysis through shared data formats like CIF.

Keywords:
CIF2DDLm dictionaryRaman spectroscopycombined Raman–X-ray diffractionopen databases

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Area of Science:

  • Materials Science
  • Crystallography
  • Spectroscopy

Background:

  • X-ray diffraction (XRD) provides detailed crystallographic information, while Raman spectroscopy offers molecular insights.
  • Combining XRD and Raman spectroscopy enables unambiguous identification of unknown compounds.
  • A comprehensive reference database is crucial for integrating Raman and XRD data effectively.

Purpose of the Study:

  • To introduce and describe the newly developed Raman Open Database (ROD).
  • To highlight the interconnectedness of ROD with other open databases (Crystallography Open Database, Theoretical Crystallography Open Database).
  • To present the data formatting standards used in ROD, including CIF and JCAMP-DX.

Main Methods:

  • Development of the Raman Open Database (ROD) to store high-quality, uncorrected Raman spectra.
  • Interlinking ROD with existing open crystallographic databases (COD, TCOD).
  • Adoption of the Crystallographic Information File (CIF) format for data entry and exchange, with JCAMP-DX as an alternative format.

Main Results:

  • The Raman Open Database (ROD) is now available, offering a valuable resource for Raman spectral data.
  • ROD's integration with crystallographic databases allows for synergistic analysis of material properties.
  • The use of CIF and JCAMP-DX formats ensures data compatibility and ease of use with existing software.

Conclusions:

  • The Raman Open Database (ROD) significantly advances the combined use of Raman spectroscopy and XRD for material identification.
  • ROD's open and interconnected nature promotes data sharing and facilitates comprehensive structural and molecular analysis.
  • The standardized data formats ensure broad accessibility and applicability of the database in scientific research.