What is it about?
The structure of opal presents a missing link in the length scale between amorphous and crystalline states. This work revisits a long-standing debate about the intermediate range order in a natural opal (opal-CT) and presents a complete multilevel structural description for local distortions and interstratification features seen in powder diffraction and pair distribution function datasets.
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Why is it important?
This work presents a complete multilevel structural description of natural opal-CT and explains many of the unusual features seen in X-ray powder diffraction patterns. This modeling approach can be adopted generally for analyzing layered materials and their assembly into 3D structures.
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This page is a summary of: Multilevel atomic structural model for interstratified opal materials, Journal of Applied Crystallography, December 2023, International Union of Crystallography,
DOI: 10.1107/s1600576723009913.
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