The classification of 1D `perovskites'

Area of Science:

• Materials Science
• Crystallography
• Solid-State Chemistry

Background:

• Hybrid perovskites are of significant research interest, with frequent reports of new structures.
• Classification of 3D and 2D perovskites is straightforward due to dimensional constraints.
• 1D perovskites exhibit numerous structural configurations due to increased degrees of freedom.

Purpose of the Study:

• To propose a new, standardized notation for classifying 1D perovskite structures.
• To base the classification on the connectivity patterns of perovskite octahedra.
• To provide a clear framework for understanding the structural diversity in 1D perovskites.

Main Methods:

• Developing a notation system based on the periodic connectivity of octahedra.
• Analyzing the structural configurations of simple 1D perovskites and haloplumbate structures.
• Evaluating the applicability and limitations of the proposed notation.

Main Results:

• A novel notation system for 1D perovskite structures has been established.
• The notation effectively classifies structures based on octahedral connectivity.
• The system is most suitable for simple 1D perovskites and haloplumbates.

Conclusions:

• The proposed notation offers a systematic approach to classifying complex 1D perovskite structures.
• This classification aids in understanding the structural diversity and relationships within this material class.
• The notation's applicability is currently limited to simpler frameworks to avoid excessive complexity.