{"title":"Structural and Chemical Transformations of Isocubanite CuFe2S3 Upon Cooling from the Melting Point","authors":"I. G. Vasilyeva, E. F. Sinyakova, S. A. Gromilov","doi":"10.1134/S0022476624050147","DOIUrl":null,"url":null,"abstract":"<p>A specific regime of continuous slow cooling of melted isocubanite CuFe<sub>2</sub>S<sub>3</sub> from 1020 °C to 638 °C is realized, and then the crystallized ingot is quenched. This regime ensures both equilibrium crystallization of primary phases and their subsequent non-equilibrium solid-phase transformations. A large series of samples cut along a 90 mm long ingot are studied by optical and electron microscopy, powder XRD, and the stoichiographic differential dissolution method. Phase compositions are determined by the electron microprobe analysis. It is established for the first time that isocubanite releases cubic chalcopyrite rather than tetragonal one upon cooling in the following order: first cationic ordering of the isocubanite matrix and then steady metastable coherent pre-precipitations of cubic chalcopyrite in the matrix to finally transform into polycrystals free from the matrix.</p>","PeriodicalId":1,"journal":{"name":"Accounts of Chemical Research","volume":null,"pages":null},"PeriodicalIF":16.4000,"publicationDate":"2024-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Accounts of Chemical Research","FirstCategoryId":"92","ListUrlMain":"https://link.springer.com/article/10.1134/S0022476624050147","RegionNum":1,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
A specific regime of continuous slow cooling of melted isocubanite CuFe2S3 from 1020 °C to 638 °C is realized, and then the crystallized ingot is quenched. This regime ensures both equilibrium crystallization of primary phases and their subsequent non-equilibrium solid-phase transformations. A large series of samples cut along a 90 mm long ingot are studied by optical and electron microscopy, powder XRD, and the stoichiographic differential dissolution method. Phase compositions are determined by the electron microprobe analysis. It is established for the first time that isocubanite releases cubic chalcopyrite rather than tetragonal one upon cooling in the following order: first cationic ordering of the isocubanite matrix and then steady metastable coherent pre-precipitations of cubic chalcopyrite in the matrix to finally transform into polycrystals free from the matrix.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号
