Accelerated discovery of two crystal structure types in a complex inorganic phase field

Area of Science:

• Materials Science
• Computational Chemistry
• Solid-State Chemistry

Background:

• Discovering new materials, especially complex inorganic solids, is challenging due to the vast number of possible compositions and structures.
• Traditional methods rely on crystal chemistry knowledge and time-consuming synthesis, limiting exploration of novel structures.
• Computational methods have aided in predicting structures or compositions but struggle with finding entirely new, experimentally viable crystal structures in complex systems.

Purpose of the Study:

• To develop and demonstrate an efficient computational-experimental approach for discovering new inorganic materials and crystal structures.
• To overcome limitations in exploring complex compositional spaces and identifying novel, stable compounds.
• To accelerate materials discovery by guiding experimental synthesis towards promising, unexplored regions of phase diagrams.

Main Methods:

• Computationally identified regions within a complex inorganic phase field containing novel structure types.
• Generated diverse 'probe structures' to capture chemical and structural diversity for energy ranking.
• Ranked computed structures against known materials to identify low-energy candidates.
• Experimentally synthesized materials from the lowest-energy computed regions.

Main Results:

• Successfully discovered two new inorganic material structure types.
• Identified materials with previously unreported crystal structures and unusual structural motifs.
• Validated the computational approach for efficiently guiding experimental synthesis in complex systems.

Conclusions:

• The integrated computational-materials discovery approach significantly accelerates the identification of new materials in complex compositional spaces.
• This method enhances the predictive power of computational tools by expanding the knowledge base with experimentally validated novel structures.
• The strategy promises to systematically discover novel, experimentally realizable compounds, advancing materials science.