Related Experiment Video
Updated: Feb 11, 2026

Structure and Coordination Determination of Peptide-metal Complexes Using 1D and 2D 1H NMR
Published on: December 16, 2013
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.
Abstract:
A novel polymorph of RbCuCl3 (rubidium copper trichloride), denoted ℇ-RbCuCl3, has been prepared by chemical vapour transport (CVT) from a mixture of CuO, CuCl2, SeO2 and RbCl. The new polymorph crystallizes in the orthorhombic space group C2221. The crystal structure is based on an octahedral framework of the 4H perovskite type. The Rb+ and Cl- ions form a four-layer closest-packing array with an ABCB sequence. The Cu2+ cations reside in octahedral cavities with a typical [4 + 2]-Jahn-Teller-distorted coordination, forming four short and two long Cu-Cl bonds. ℇ-RbCuCl3 is the most structurally complex and most dense among all currently known RbCuCl3 polymorphs, which allows us to suggest that it is a high-pressure phase, which is unstable under ambient conditions.
Related Concept Videos
Assembly of Complex Microtubule Structures
Structural Isomerism
Isomers are different chemical species that have the same chemical formula. Structural isomerism of coordination compounds can be divided into two subcategories, the linkage isomers and coordination-sphere isomers.
Linkage isomers occur when the coordination compound contains a ligand that can bind to the transition metal center through two different atoms. For example, the CN− ligand can bind through the carbon atom or through the nitrogen atom. Similarly, SCN− can...
Protein and Protein Structure
A protein's shape is critical to its function. For example, an enzyme...
Structures of Solids
Additional Subnuclear Structures
The nucleus contains many membrane-less subnuclear organelles or nuclear bodies, such as nucleoli, Cajal bodies, speckles,...
Structure of Lipids

