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Related Concept Videos

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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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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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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Related Experiment Video

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Synchrotron X-ray Microdiffraction and Fluorescence Imaging of Mineral and Rock Samples
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X-ray microdiffraction of biominerals.

Nobumichi Tamura1, Pupa U P A Gilbert

  • 1Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California, USA.

Methods in Enzymology
|November 6, 2013
PubMed
Summary
This summary is machine-generated.

Hard X-ray diffraction and scattering techniques with X-ray microdiffraction and microbeam small-angle X-ray scattering are crucial for studying complex biomineral structures. These methods reveal intricate details of biominerals, advancing our understanding of biomineralization.

Keywords:
BiomineralBraggCrystalCrystalliteDebye–ScherrerDiffractionDiffractometerGrainInverse pole figureLaueMaterialMesocrystalMicrobeamMicrodiffractionMicrofocusMineralMonochromaticMultigrainPatternPink beamPole figurePolychromaticPolycrystallinePowderReflectionSAXSSmall-angle scatteringStructureSynchrotronTextureWAXSWhite beamWhite lightWide-angle scatteringX-ray

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Area of Science:

  • Biomineralization research
  • Materials science
  • X-ray physics

Background:

  • Biominerals exhibit complex, heterogeneous architectures.
  • Characterizing these structures requires high spatial resolution (500 nm to 10 μm).
  • Advanced X-ray techniques are essential for detailed analysis.

Purpose of the Study:

  • To review hard X-ray diffraction and scattering techniques for biomineral characterization.
  • To highlight the utility of X-ray focusing optics.
  • To showcase discoveries in biomineralization enabled by these methods.

Main Methods:

  • Monochromatic X-ray microdiffraction
  • Polychromatic (Laue) X-ray microdiffraction
  • Microbeam small-angle X-ray scattering (μSAXS)

Main Results:

  • These techniques provide essential spatial resolution for biomineral analysis.
  • State-of-the-art X-ray focusing optics enhance experimental efficiency.
  • Review of key discoveries in biomineralization using these advanced methods.

Conclusions:

  • Hard X-ray microdiffraction and scattering are powerful tools for biomineral research.
  • The application of these techniques has led to significant advancements in understanding biomineralization.
  • Future studies can leverage these methods for further exploration of complex biomineral systems.