3 years ago

Linear, Hypervalent Se34– Units and Unprecedented Cu4Se9 Building Blocks in the Copper(I) Selenide Ba4Cu8Se13

Linear, Hypervalent Se34– Units and Unprecedented Cu4Se9 Building Blocks in the Copper(I) Selenide Ba4Cu8Se13
Olivier Perez, David Berthebaud, Sylvie Hébert, Denis Pelloquin, Franck Gascoin, Stefan Maier
The new ternary copper(I) selenide Ba4Cu8Se13 was discovered. It crystallizes in a new structure type and is the first example containing Cu4Se9 building blocks and coexisting Se22− and linear, hypervalent Se34− units. Ba4Cu8Se13 is a charge-balanced semiconductor and possesses a large Seebeck coefficient (380 μV K−1 at 200 K) and a low thermal conductivity (0.77 W m−1 K−1 at 200 K)—two requirements for efficient thermoelectric materials.

Publisher URL: http://dx.doi.org/10.1021/acs.inorgchem.7b01224

DOI: 10.1021/acs.inorgchem.7b01224

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