Oxygen content, crystal structure and chemical expansion of PrBaCo 2-xFexO6-δ double perovskites / Tsvetkov D.S., Ivanov I.L., Malyshkin D.A., Zuev A.Yu. // Dalton Transactions. - 2014. - V. 43, l. 31. - P. 11862-11866.

ISSN:

14779226

Type:

Article

Abstract:

PrBaCo2-xFexO6-δ (x = 0-0.6) double perovskites were shown to have a tetragonal P4/mmm structure in air over the complete temperature range investigated despite the oxygen content reaching a threshold value of 5.5 at temperatures from 850°C for x = 0 up to 1078°C for x = 0.6. However the P4/mmm→Pmmm structure transition was found to occur in PrBaCo2O6-δ under reducing conditions at temperatures from 500 °C at pO2 = 10-3 atm down to 350 °C at pO2 = 10-4 atm. The lattice chemical expansion along the a-axis and contraction along the c-axis, with decreasing oxygen content, 6 - δ, were found to completely compensate each other in the double perovskites and, therefore, their volume chemical expansion became negligible. As a result the cell volume linearly increases with temperature contrary to simple cubic perovskites. This journal is © the Partner Organisations 2014.

Author keywords:

Index keywords:

Oxygen; Cell volume; Chemical expansion; Double perovskites; Oxygen content; Reducing conditions; Simple cubic; Structure transitions; Temperature range; Perovskite; calcium derivative; oxide; oxygen;

DOI:

10.1039/c4dt00847b

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https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904431015&doi=10.1039%2fc4dt00847b&partnerID=40&md5=f83a20da43a59ab351b5e6f3587ae6e2

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Поле	Значение
Link	https://www.scopus.com/inward/record.uri?eid=2-s2.0-84904431015&doi=10.1039%2fc4dt00847b&partnerID=40&md5=f83a20da43a59ab351b5e6f3587ae6e2
Affiliations	Department of Chemistry, Institute of Natural Sciences, Ural Federal University, Ekaterinburg 620000, Russian Federation
Chemicals/CAS	oxide, 16833-27-5; oxygen, 7782-44-7; perovskite, 12194-71-7, 61027-03-0; titanium, 7440-32-6; Calcium Compounds; Oxides; Oxygen; perovskite; Titanium
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Correspondence Address	Tsvetkov, D.S.; Department of Chemistry, Institute of Natural Sciences, Ural Federal University, Ekaterinburg 620000, Russian Federation; email: dmitry.tsvetkov@urfu.ru
Publisher	Royal Society of Chemistry
CODEN	DTARA
PubMed ID	24964366
Language of Original Document	English
Abbreviated Source Title	Dalton Trans.
Source	Scopus