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Related Concept Videos

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.
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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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Atomic Orbitals02:44

Atomic Orbitals

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An atomic orbital represents the three-dimensional regions in an atom where an electron has the highest probability to reside. The radial distribution function indicates the total probability of finding an electron within the thin shell at a distance r from the nucleus. The atomic orbitals have distinct shapes which are determined by l, the angular momentum quantum number. The orbitals are often drawn with a boundary surface, enclosing densest regions of the cloud.
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Electron Microscope Tomography and Single-particle Reconstruction01:07

Electron Microscope Tomography and Single-particle Reconstruction

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Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
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¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)01:20

¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)

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When proton-coupled carbon-13 spectra are simplified by a broadband proton decoupling technique, structural information about the coupled protons is lost. Distortionless enhancement by polarization transfer (DEPT) is a technique that provides information on the number of hydrogens attached to each carbon in a molecule. While the DEPT experiment utilizes complex pulse sequences, the pulse delay and flip angle are specifically manipulated. The resulting signals have different phases depending on...
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Mass Analyzers: Common Types01:19

Mass Analyzers: Common Types

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The quadrupole mass analyzer consists of four cylindrical metal rods arranged in a diamond carrying a DC voltage and a radio-frequency AC voltage. The motion of ions through the quadrupole depends on the field strength, causing only ions of a certain m/z to resonate successfully and strike the detector at a given field strength. Though the transmission rate for these analyzers is high, the exact elemental composition of the sample is not determined because of low resolution; however, they are...
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Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule01:10

Interpreting ¹H NMR Signal Splitting: The (n + 1) Rule

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In the AX proton spin system, proton A can sense the two spin states of a coupled proton X, resulting in a doublet NMR signal with two peaks of equal (1:1) intensity. When proton A is coupled to two equivalent protons (AX2 spin system), the spin states of each X can be aligned with or against the external field, creating three possible scenarios. This results in a 1:2:1  triplet signal, where the central peak corresponds to the chemical shift of A and is twice as large or intense as the...
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Related Experiment Video

Updated: Jun 27, 2025

Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene
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Measurements of Long-range Electronic Correlations During Femtosecond Diffraction Experiments Performed on Nanocrystals of Buckminsterfullerene

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3D electron diffraction goes multipolar.

R Beanland1

  • 1Department of Physics, University of Warwick, Coventry CV4 7AL, United Kingdom.

Iucrj
|May 3, 2024
PubMed
Summary
This summary is machine-generated.

Atomic bonding significantly impacts electron diffraction patterns, a finding now extended to 3D electron diffraction data. This discovery advances the field of quantum crystallography by revealing new analytical possibilities.

Keywords:
3D electron diffractiondynamical refinementelectron crystallographymicrocrystal electron diffractionmultipolar scattering factorsquantum crystallographytransferable aspherical atom model

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Area of Science:

  • Crystallography
  • Materials Science
  • Quantum Mechanics

Background:

  • Atomic bonding effects on convergent beam electron diffraction (CBED) patterns were established over 30 years ago.
  • Previous studies primarily focused on 2D diffraction phenomena.

Purpose of the Study:

  • To investigate the influence of atomic bonding on three-dimensional (3D) electron diffraction data.
  • To explore the potential of these findings for advancing quantum crystallography.

Main Methods:

  • Analysis of 3D electron diffraction data.
  • Comparison with established principles of electron diffraction and atomic bonding theory.

Main Results:

  • The study confirms that atomic bonding effects are clearly observable in 3D electron diffraction data.
  • These effects provide new parameters for analyzing crystalline structures.

Conclusions:

  • The influence of atomic bonding extends to 3D electron diffraction, validating its significance.
  • This research opens novel avenues for quantum crystallography, enabling more detailed structural analysis.