The phase transition of rubidium hydrogen carbonate, RbHCO3.

Title The phase transition of rubidium hydrogen carbonate, RbHCO3.
Authors C. Larvor; B. Stöger
Journal Acta Crystallogr E Crystallogr Commun
DOI 10.1107/S2056989017008271

Rubidium hydrogen carbonate, RbHCO3, features an order/disorder phase transition at TC = 245?K from the high-temperature (HT) disordered C2/m modification to the low-temperature (LT) C-1 modification. The crystal structures are characterized by [HCO3]2(2-) pairs of hydrogen carbonate groups connected by strong hydrogen bonding. The [HCO3]2(2-) pairs are connected by Rb(+) cations into a three-dimensional network. In HT-RbHCO3, the hydrogen atom is disordered. In LT-RbHCO3, ordering of the hydrogen atom leads to a translation-engleiche symmetry reduction of index 2. The lost reflections and rotations are retained as twin operations.

Citation C. Larvor; B. Stöger.The phase transition of rubidium hydrogen carbonate, RbHCO3.. Acta Crystallogr E Crystallogr Commun. 2017;73(Pt 7):975979. doi:10.1107/S2056989017008271

Related Elements


See more Rubidium products. Rubidium (atomic symbol: Rb, atomic number: 37) is a Block S, Group 1, Period 5 element with an atomic weight of 5.4678. The number of electrons in each of Rubidium's shells is [2, 8, 18, 8, 1] and its electron configuration is [Kr] 5s1. The rubidium atom has a radius of 248 pm and a Van der Waals radius of 303 pm. Rubidium Bohr ModelRubidium is highly reactive, with properties similar to other Group 1 alkali metals, e.g., rapid oxidation in air. In its elemental form, rubidium has a gray white appearance. Rubidium is found in the minerals lepidolite, leucite, pollucite, carnallite, and zinnwaldite as well as some potassium minerals. Rubidium was discovered by Robert Bunsen and Gustav Kirchhoff in 1861 and was first isolated by George de Hevesy. The name Rubidium, originates from the Latin word rubidus, meaning "dark or deepest red."

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