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Updated: Feb 11, 2026
14:44
Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
10.1K
ℇ-RbCuCl3, a new polymorph of rubidium copper trichloride: synthesis, structure and structural complexity
Ilya V Kornyakov1, Sergey V Krivovichev1, Vladislav V Gurzhiy1
1Department of Crystallography, St Petersburg State University, University Emb., 7/9, St Petersburg, 199034, Russian Federation.
Summary
Researchers discovered a new, dense polymorph of rubidium copper trichloride (RbCuCl3), named ℇ-RbCuCl3. This complex crystal structure suggests it may be a high-pressure phase unstable at ambient conditions.
Area of Science:
- Solid State Chemistry
- Crystallography
- Materials Science
Background:
- Rubidium copper trichloride (RbCuCl3) exhibits diverse polymorphs.
- Understanding structural variations is key to predicting material properties.
Purpose of the Study:
- To synthesize and characterize a novel polymorph of RbCuCl3.
- To elucidate the crystal structure and coordination environment of the new phase.
Main Methods:
- Chemical Vapour Transport (CVT) synthesis.
- X-ray crystallography for structure determination.
Main Results:
- A new polymorph, ℇ-RbCuCl3, was successfully prepared.
- The structure crystallizes in the orthorhombic space group C2221, featuring a 4H perovskite-type octahedral framework.
- Cu2+ cations exhibit [4+2]-Jahn-Teller distortion within octahedral cavities.
Conclusions:
- ℇ-RbCuCl3 is the most structurally complex and dense RbCuCl3 polymorph identified to date.
- Its properties suggest it is likely a high-pressure phase, unstable under ambient conditions.
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