Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1330467 | Journal of Solid State Chemistry | 2012 | 6 Pages |
Cs3U18Se38 was synthesized by the solid-state reactions of U, Se, CsCl or Cs2Se3, and P or As at 1273 K. This compound crystallizes in a new structure in the tetragonal space group D184h-I4/mcm. The asymmetric unit contains U atoms in four different coordination environments. The overall three-dimensional network structure contains channels along the c axis, in which the Cs atoms lie. The formula Cs3U18Se38 does not charge balance with the typical formal oxidation states of the elements. Electrical resistivity measurements conducted on a single crystal reveal a broad feature at 225 K, atypical semiconductor behavior below 57 K, and a calculated band gap of 0.0030(1) eV.
Graphical abstractThe structure of Cs3U18Se38.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Cs3U18Se38, which crystallizes in a new structure type, was synthesized and characterized. ► The formula Cs3U18Se38 does not charge balance with the typical oxidation states of the elements. ► A calculated band gap of 0.0030(1) eV as determined from single-crystal resistivity measurements.