Solving the crystal structures of zeolites using electron diffraction data. II. Density-building functions

Area of Science:

• Crystallography
• Materials Science
• Electron Diffraction

Background:

• Solving crystal structures is crucial for understanding material properties.
• Electron diffraction offers a powerful method for analyzing crystalline materials.
• Accurate phase determination remains a significant challenge in structure solution.

Purpose of the Study:

• To develop and validate a new density-building function for solving zeolite crystal structures.
• To assess the efficacy of the method using both 2D and 3D electron diffraction data.
• To improve the accuracy and efficiency of structure determination in zeolites.

Main Methods:

• Utilized a density-building function with maximum-entropy methods.
• Employed normalized unitary structure factors and permuted phase sets.
• Incorporated log-likelihood gain and potential histogram information for refinement.
• Applied the method to two- and three-dimensional electron diffraction datasets.

Main Results:

• Successfully solved seven out of eight zeolite crystal structures with varying complexity and data quality.
• The density-building function demonstrated routine success in structure determination.
• The method showed robustness across different datasets.

Conclusions:

• The developed density-building function is a viable tool for solving zeolite crystal structures from electron diffraction data.
• The method shows promise for routine application in materials science and crystallography.
• Further refinement may be needed for challenging structures where the method failed.