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In situ X-ray Diffraction Study of the Thermal Decomposition of Selenogallates Cs2[Ga2(Se2)2-xSe2+x] (x = 0, 1, 2)

URN to cite this document:
urn:nbn:de:bvb:355-epub-381165
Friedrich, Daniel ; Schlosser, Marc ; Pfitzner, Arno
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Date of publication of this fulltext: 11 Dec 2018 10:25


Abstract

The selenogallates CsGaSe3 and Cs2Ga2Se5 release gaseous selenium upon heating. An in situ high-temperature X-ray powder diffraction analysis revealed a two-step degradation process from CsGaSe3 to Cs2Ga2Se5 and finally to CsGaSe2. During each step, one Se22– unit of the anionic chains in Cs2[Ga2(Se2)2–xSe2+x] (x = 0, 1, 2) decomposes, and one equivalent of selenium is released. This thermal ...

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