Abstract
The reported wide-range nonstoichiometric Ni1+xTe2, 0≤x≤0.83, and Ni1+xSe2, 0.57≤x≤0.92, CdI2/NiAs structure type solid solution fields have been carefully reinvestigated via electron and X-ray powder diffraction to search for evidence of Ni/vacancy ordering and superstructure phases. In the case of telluride, evidence is thereby found for a Ni3Te4 superstructure phase attempting to condense out at x∼0.5 while, in the case of selenide, three quite distinct phases have been identified within the Ni1+xSe2 solid solution field. An intriguing characteristic honeycomb diffuse-intensity distribution has also been observed across the solid solution field in the case of the Ni1+xTe2 system. Its presence has been attributed to low frequency phonon modes along certain very specific directions of reciprocal space.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.