Search
Abstract
The results of heat capacity measurements for the lanthanum orthoniobate substituted with 10, 20 and 30 mol% of antimony (LaNb0.9Sb0.1O4, LaNb0.8Sb0.2O4 and LaNb0.7Sb0.3O4) are presented and discussed. Temperature dependence of low temperature heat capacity was analyzed within the Debye and Einstein models. The Debye temperature decreased, whereas the Einstein temperature increased with antimony content. The decrease of the Debye temperature with increasing antimony content was correlated with decreasing scheelite–fergusonite transition temperature. The increase of the Einstein temperature of LaSbxNb1−xO4 with increasing antimony content may indicate increasing frequency of optical vibrations of Nb(Sb)–O4−2 polyhedra relative to La3+ cations. Using the heat capacity data, standard entropies of the phases were calculated and combined with previously measured enthalpies of formation to obtain Gibbs energies of formation. Standard thermodynamic properties were tabulated
Citations
-
1 1
CrossRef
-
0
Web of Science
-
1 1
Scopus
Authors (7)
-
Alexandra Navrotsky
- University of California Davis Peter A Rock Thermochemistry Laboratory
Cite as
Full text
- Publication version
- Accepted or Published Version
- License
-
open in new tab
Keywords
Details
- Category:
- Articles
- Type:
- artykuł w czasopiśmie wyróżnionym w JCR
- Published in:
-
CERAMICS INTERNATIONAL
no. 42,
edition 6,
pages 7054 - 7059,
ISSN: 0272-8842 - Publication year:
- 2016
- Bibliographic description:
- Mielewczyk-Gryń A., Wachowski S., Strychalska-Nowak J., Zagórski K., Klimczuk T., Navrotsky A., Gazda M.: Heat capacities and thermodynamic properties of antimony substituted lanthanum orthoniobates// CERAMICS INTERNATIONAL. -Vol. 42, iss. 6 (2016), s.7054-7059
- DOI:
- Digital Object Identifier (open in new tab) 10.1016/j.ceramint.2016.01.093
- Verified by:
- Gdańsk University of Technology
seen 187 times
Recommended for you
Structure redetermination, transport and thermal properties of the YNi3Al9 compound
- I. Oshchapovskyy,
- E. E. Oyeka,
- T. Tran
- + 2 authors
Superconductivity in the intermetallic compound Zr5Al4
- Z. Sobczak,
- M. Winiarski,
- W. Xie
- + 2 authors
Superconducting properties and electronic structure of NaBi
- S. K. Kushwaha,
- J. W. Krizan,
- J. Xiong
- + 5 authors