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Issue 9, 2017
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Thermal expansion in BaRuO3 perovskites – an unusual case of bond strengthening at high temperatures

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Abstract

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.

Graphical abstract: Thermal expansion in BaRuO3 perovskites – an unusual case of bond strengthening at high temperatures

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Publication details

The article was received on 25 Nov 2016, accepted on 03 Feb 2017 and first published on 03 Feb 2017


Article type: Paper
DOI: 10.1039/C6DT04473E
Citation: Dalton Trans., 2017,46, 2974-2980

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

    P. Kayser, S. Injac, B. J. Kennedy, A. L. Menezes de Oliveira, Y. Shirako and M. Hasegawa, Dalton Trans., 2017, 46, 2974
    DOI: 10.1039/C6DT04473E

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