CrSe2, a new layered dichalcogenide

Evidences for the Formation of Chromium in the Unusual Oxidation State Cr(IV)

“…But both the EXAFS results and the e!ective magnetic moment per Cr undoubtly support these formulations. The existence of appreciable amounts of Cr(IV) was also postulated for CrSe , which was obtained by a topotactic redox reaction between K V CrSe and iodine in acetonitrile (17). On the other hand SchoK llhorn et al presented evidences that in chalcogen spinels CuCr X (X"S, Se, Te) anion p band holes exist leading to the formulation Cu'(Cr''') (X\')(X\'') (18}20).…”

Lattice Vibrations in the Charge‐Density‐Wave States of Layered Transition Metal Dichalcogenides

“…The transition metal dichalcogenides of group-IV and V I elements are semiconducting except for a semimetallic compound, TiSe,, which shows a phase transition related to the CDW phase transition. CrSe, is also reported to show a phase transition [67]. 1T-and 2H-structures are the basic in the polymorphism of these compounds.…”

The Reaction Mechanism of a Complex Intercalation System: In Situ X‐ray Diffraction Studies of the Chemical and Electrochemical Lithium Intercalation in Cr4TiSe8

“…Unfortunately, calculation of the electronic band structure of Cr 4 TiSe 8 is not straightforward owing to its open nature and the large number of atoms in the unit cell. Localised d-electron states on Cr were observed in K x CrSe 2 [29] and Na x > 0.6 CrSe 2 , [30] whereas non-intercalated CrSe 2 exhibits delocalised d states. [30] Delocalisation or partial delocalisation is discussed for Cr 5 Se 8 [31] (V 5 S 8 structure type) and Li x Ti 1Ày Cr y S 2 .…”