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Structure and thermochemical reactivity of La2−xSrxCu1−xRuyO4−δ

✍ Scribed by Stefan Ebbinghaus; Armin Reller

Book ID
104296725
Publisher
Elsevier Science
Year
1997
Tongue
English
Weight
788 KB
Volume
101-103
Category
Article
ISSN
0167-2738

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✦ Synopsis

We report the synthesis of about 90 members of the system La,_,SrxCu, _,Ru,,O,_,. Samples were prepared by conventional solid state reactions and characterized by X-ray powder diffraction. We found single phase products adopting the K,NiF,-type structure in the whole range 0 5 y 5 1. For a subset of samples Rietveld refinements and thermoanalytical investigations were carried out. The influence of x and y on the structure is discussed. An increasing Sr content was found to cause the formation of some Cu"'/Ru". For large x the value of S increases, leading finally to a breakdown of the structure.

📜 SIMILAR VOLUMES

Determination of the Oxidation States of
Determination of the Oxidation States of Cu and Ru in the System La2−xSrxCu1−yRuyO4−δ by XANES-Measurements
✍ Stefan Ebbinghaus; Zhiwei Hu; Armin Reller 📂 Article 📅 2001 🏛 Elsevier Science 🌐 English ⚖ 246 KB

Numerous samples of the system La 2؊x Sr x Cu 1؊y Ru y O 4؊ (0.86 4 x 4 2, 0.05 4 y 4 1) as well as several other cuprates and ruthenates have been investigated by XANES spectroscopy. The exact energy positions of the white lines observed at the Cu+ and Ru+L III absorption edges are a sensitive meas