Polymorphic modifications of novel cerium germanide Ce33.3Ir22.2Ge44.5 (at.[%])
Gribanov A. V., Gribanova S. V., Kaczorowski D.
Journal of Alloys and Compounds
Vol.808, Num.151695
Опубликовано: 2019
Тип ресурса: Статья
DOI:10.1016/j.jallcom.2019.151695
Аннотация:
The formation of novel ternary cerium germanide with the chemical composition Ce33.3Ir22.2Ge44.5 (at.[%]) was established. As derived from powder X-ray diffraction data, the compound crystallizes with two polymorphic modifications. The high-temperature modification, established for as-cast alloy, possesses a tetragonal ThSi2-type structure and can be named as Ce(IrxGe1-x)2, x = 0.32. The low-temperature modification forms in the course of heat treatment at 1073 K, crystallizes with an orthorhombic structure of its own type and can be labeled as Ce3Ir2-xGe4+x, x = 0.02. Both structures belong to the AlB2 structural family and are closely related to each other. In both modifications, statistical mixtures of Ir and Ge atoms occupy same crystallographic sites. As found by means of magnetization measurements, the two structural variants of Ce33.3Ir22.2Ge44.5 (at.[%]) exhibit very similar magnetic properties. Both polymorphs are Curie-Weiss paramagnets with strong crystalline electric field feat
Ключевые слова:
A. rare earth alloys and compounds; B. chemical synthesis; C. crystal structure; D. X-ray diffraction; Magnetic measurements; Magnetization
Aluminum compounds; Cerium; Crystal structure; Electric fields; Geochemistry; Low temperature operations; Magnetic variables measurement; Magnetization; Rare earths; Temperature; X ray diffraction; Crystalline electric fields; High temperature modification; Low-temperature modification; Magnetization measurements; Orthorhombic structures; Polymorphic modifications; Powder X ray diffraction; Rare-earth alloys and compounds; Cerium compounds
Язык текста: Английский
ISSN: 1873-4669
Gribanov A. V.
Gribanova S. V. Svetlana Vasilyevna 1959-
Kaczorowski D.
Грибанов А. В.
Грибанова С. В. Светлана Васильевна 1959-
Каcзороwски Д.
Polymorphic modifications of novel cerium germanide Ce33.3Ir22.2Ge44.5 (at.[%])
Текст визуальный непосредственный
Journal of Alloys and Compounds
Elsevier Science Publisher B.V.
Vol.808 Num.151695
2019
Статья
A. rare earth alloys and compounds B. chemical synthesis C. crystal structure D. X-ray diffraction Magnetic measurements Magnetization
Aluminum compounds Cerium Crystal structure Electric fields Geochemistry Low temperature operations Magnetic variables measurement Magnetization Rare earths Temperature X ray diffraction Crystalline electric fields High temperature modification Low-temperature modification Magnetization measurements Orthorhombic structures Polymorphic modifications Powder X ray diffraction Rare-earth alloys and compounds Cerium compounds
The formation of novel ternary cerium germanide with the chemical composition Ce33.3Ir22.2Ge44.5 (at.[%]) was established. As derived from powder X-ray diffraction data, the compound crystallizes with two polymorphic modifications. The high-temperature modification, established for as-cast alloy, possesses a tetragonal ThSi2-type structure and can be named as Ce(IrxGe1-x)2, x = 0.32. The low-temperature modification forms in the course of heat treatment at 1073 K, crystallizes with an orthorhombic structure of its own type and can be labeled as Ce3Ir2-xGe4+x, x = 0.02. Both structures belong to the AlB2 structural family and are closely related to each other. In both modifications, statistical mixtures of Ir and Ge atoms occupy same crystallographic sites. As found by means of magnetization measurements, the two structural variants of Ce33.3Ir22.2Ge44.5 (at.[%]) exhibit very similar magnetic properties. Both polymorphs are Curie-Weiss paramagnets with strong crystalline electric field feat