Calorimetric investigation of new Bi12.5Dy1.5ReO24.5 phase

► We synthesized new compound Bi12.5Dy1.5ReO24.5. ► We measured formation enthalpy of Bi12.5Dy1.5ReO24.5. ► We constructed dependence of ΔoxHo for Bi12.5R1.5ReO24.5 (R=La, Nd, Gd, Dy) on rare-earth radii. The Bi12.5Dy1.5ReO24.5 phase has been prepared from Bi2O3, Dy2O3, and Re2O7. X-ray measurements...

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Bibliographic Details
Published inJournal of alloys and compounds Vol. 538; pp. 45 - 47
Main Authors Matskevich, Nata I., Wolf, Thomas
Format Journal Article
LanguageEnglish
Published Elsevier B.V 15.10.2012
Subjects
Alloys
Bismuth oxide
Calorimetry
Dysprosium
Enthalpy
Oxides
Rare earth metals
Size effect of rare-earth radii
Thermodynamic stability
X-rays
Size effect of rare-earth radii
Bismuth oxide
Thermodynamic stability
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Summary:► We synthesized new compound Bi12.5Dy1.5ReO24.5. ► We measured formation enthalpy of Bi12.5Dy1.5ReO24.5. ► We constructed dependence of ΔoxHo for Bi12.5R1.5ReO24.5 (R=La, Nd, Gd, Dy) on rare-earth radii. The Bi12.5Dy1.5ReO24.5 phase has been prepared from Bi2O3, Dy2O3, and Re2O7. X-ray measurements have showed that Bi12.5Dy1.5ReO24.5 has a cubic structure (Fm3m space group). The standard formation enthalpy of Bi12.5Dy1.5ReO24.5 has been determined by solution calorimetry combining solution enthalpies of Bi12.5Dy1.5ReO24.5, 6.25Bi2O3+0.75Dy2O3+0.5Re2O7 mixture in 2M HCl and literature data. Dependence on rare-earth radius for Bi12.5R1.5ReO24.5 (R=La, Nd, Gd, Dy) formation enthalpies from binary oxides was constructed. It has been showed that this dependence is linear.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2012.05.097