Abstract
Two missing compounds within the binary K-Se system have been synthesized and structurally characterized by means of single-crystal diffraction. β-K2Se2 comprises cell parameters that are in line with predictions made from the series α/β-A2Chx. K2Se4, in contrast, incorporates “Se52–” chains with 50% occupation of the terminal selenium atoms, and has been synthesized on a rather unconventional solvothermal pathway employing successively mercury and ethylene dithiol as solvents.
Acknowledgments
G.T. thanks the Friedrich-Ebert-Stiftung. L.V. thanks the Studienstiftung des deutschen Volkes. Financial support from DFG (SPP 1415) is gratefully acknowledged. We are obliged to R. Riedel and M. Marsch for their help with X-ray diffraction.
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