Coexistence of multiple metastable polytypes in rhombohedral bismuth
- Yanshan Univ., Hebei (China)
- Carnegie Inst. of Washington, Argonne, IL (United States)
- Univ. of Chicago, Argonne, IL (United States)
Derivative structural polytypes coexisting with the rhombohedral A7 structure of elemental bismuth (Bi) have been discovered at ambient condition, based on microstructure analyses of pure Bi samples treated under high pressure and high temperature conditions. Three structures with atomic positions close to those of the A7 structure have been identified through first-principles calculations, showing these polytypes energetically comparable to the A7 structure under ambient condition. Simulated diffraction data are in excellent agreement with the experimental observations. We argue that previously reported some variations of physical properties (e.g., density, electrical conductivity and magnetism) in bismuth could be due to the formation of these polytypes. The coexistence of metastable derivative structural polytypes may be a widely occurring phenomenon in other elemental materials.
- Research Organization:
- Argonne National Laboratory (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- National Natural Science Foundation of China (NSFC); Ministry of Science and Technology of China; National Science Foundation (NSF)
- Grant/Contract Number:
- 51121061; EAR-0968456; 2011CB808205; 2010CB731605; 51332005; 51172197; 11025418; 91022029
- OSTI ID:
- 1249226
- Journal Information:
- Scientific Reports, Vol. 6, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- ENGLISH
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