Real-time in situ monitoring of the topotactic transformation of TlCu5Se3 into metastable o-TlCu4Se3
2016 (English)In: Journal of Alloys and Compounds, ISSN 0925-8388, E-ISSN 1873-4669, Vol. 685, 436-441 p.Article in journal (Refereed) Published
The transformation within the solid state of tetragonal TlCu5Se3 into the metastable orthorhombic form of TlCu4Se3 by oxidative copper leaching in concentrated ammonia solution has been studied in situ by conventional X-ray powder diffraction. The ease with which the reaction occurs illustrates a comparatively high diffusion coefficient typical of copper sulphides and selenides. The diffraction patterns of the parent phase as well as the product remain sharp during the process, indicating strong topotaxy in the first-order transformation that is effectuated by the access of oxygen while the accompanying released copper enters the liquid phase. The transformation was followed in a real-time mode, leading to a complete transformation of the amount probed.
Place, publisher, year, edition, pages
2016. Vol. 685, 436-441 p.
In situ diffraction, Topotactic transformation, Oxidative copper leaching
IdentifiersURN: urn:nbn:se:uu:diva-305291DOI: 10.1016/j.jallcom.2016.05.269ISI: 000382222300064OAI: oai:DiVA.org:uu-305291DiVA: diva2:1038339