Thermal expansion in BaRuO3 perovskites - an unusual case of bond strengthening at high temperatures

The temperature dependences of the structures of three polytypes of BaRuO3 have been investigated between room temperature and 1000 °C using high resolution synchrotron X-ray diffraction. The structural studies reveal a systematic decrease of the Ru-Ru distance as the pressure required to prepare th...

Full description

Saved in:
Bibliographic Details
Published inDalton transactions : an international journal of inorganic chemistry Vol. 46; no. 9; pp. 2974 - 2980
Main Authors Kayser, Paula, Injac, Sean, Kennedy, Brendan J, Menezes de Oliveira, Andre L, Shirako, Yuichi, Hasegawa, Masashi
Format Journal Article
LanguageEnglish
Published 2017
Subjects
Bonding
Bonding strength
Heating
Perovskites
Polytypes
Strengthening
Synchrotrons
X ray diffraction
Online AccessGet full text

Cover

More Information
Summary:The temperature dependences of the structures of three polytypes of BaRuO3 have been investigated between room temperature and 1000 °C using high resolution synchrotron X-ray diffraction. The structural studies reveal a systematic decrease of the Ru-Ru distance as the pressure required to prepare the polytype increases. The O-O distance across the shared face increases as the Ru-Ru separation decreases. The 9R and 4H polytypes undergo unexceptional changes with increasing temperature. In 6H-BaRuO3 there is an apparent increase in the Ru-Ru interaction at around 650 °C and a concurrent reduction in the O-O distance, indicating an anomalous strengthening of the Ru-Ru interactions upon heating.
Bibliography:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1477-9226
1477-9234
DOI:10.1039/c6dt04473e