Related Experiment Video
Updated: Sep 10, 2025
11:48
Microfluidic Chips for In Situ Crystal X-ray Diffraction and In Situ Dynamic Light Scattering for Serial Crystallography
Published on: April 24, 2018
14.8K
RAPID-DM: A DigitalMicrograph® Script for On-Site Indexing of Zone Axis Aligned Electron Diffraction Patterns of
Vasilis A Maroufidis1, Thomas E Weirich1
1Central Facility for Electron Microscopy (GFE), RWTH Aachen University, Ahornstr. 55, Aachen D-52074, Germany.
Summary
A new script, RAPID-DM, enables rapid on-site indexing of electron diffraction patterns from cubic materials. This tool simplifies crystallographic analysis for various materials, including steels and ceramics.
Area of Science:
- Materials Science
- Crystallography
- Electron Microscopy
Background:
- Accurate crystallographic analysis is crucial for materials characterization.
- Electron diffraction is a powerful technique for determining crystal structures.
- Manual indexing of electron diffraction patterns can be time-consuming and complex.
Purpose of the Study:
- To develop an automated script for rapid on-site indexing of electron diffraction patterns.
- To simplify the analysis of both spot and Kikuchi patterns from cubic lattices.
- To provide a user-friendly tool for evaluating material symmetry and lattice parameters.
Main Methods:
- Development of a DigitalMicrograph® script named RAPID-DM (RAtio method Pattern InDexing).
- Utilizes the Rn ratio principle for indexing zone axis electron diffraction patterns.
- Capable of indexing both spot and Kikuchi patterns with minimal user input (three lines or bands).
Main Results:
- RAPID-DM enables instant on-site indexing of electron diffraction patterns from cubic lattices.
- The script reliably indexes both calibrated and non-calibrated patterns.
- It accurately distinguishes between cubic, pseudo-cubic, and non-cubic materials.
- For calibrated patterns, it provides an average lattice parameter for phase identification.
Conclusions:
- RAPID-DM significantly simplifies and accelerates on-site crystallographic analysis.
- The script is a valuable tool for researchers working with cubic or pseudo-cubic materials like steels, alloys, and ceramics.
- It enhances the utility of electron microscopy platforms for routine materials characterization.
Related Concept Videos
02:18X-ray Crystallography
24.2K
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...
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...
24.2K
01:10X-ray Diffraction of Biological Samples
4.0K
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...
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...
4.0K