CuSeO₄ and Cu(SeO₃OH)₂·6H₂O: A tribute to the enlightenment of the stereochemistry of Cu²⁺ ions by Josef Zemann (1923–2022)

Author(s)

Herta Silvia Effenberger, Gerald Giester, Manfred Wildner

Abstract

In

the middle of the last century the stereochemistry of divalent copper

atoms was mostly unknown. Crystal structure investigations of

trippkeite, azurite, linarite, or teineite led Josef Zemann (1923-2022)

to understand the coordination figures controlled by the

Jahn-Teller-effect. In contrast to the earlier thought CuO₆ octahedra, he described the coordination figures as planar [4], tetragonal pyramidal [4+1], and tetragonal dipyramidal [4+2] (Zemann 1961; 1972). The additional ligands have none or only a minor influence on the geometry of the CuO₄ square. In honour to these pioneering investigations, two further compounds with Cu²⁺ ions are presented here: Cu(SeO₄) and Cu(SeO₃OH)₂∙6H₂O. They were synthesized at low-temperature hydrothermal conditions (220 °C) and room temperature, respectively.

Organisation(s)

Department of Mineralogy and Crystallography

Publication date

2023

Austrian Fields of Science 2012

105116 Mineralogy, 105113 Crystallography

Portal url

https://ucrisportal.univie.ac.at/en/publications/4a225b0a-0d36-4bbc-acdb-d4511d262d4c