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Shape tuneable synthesis of perovskite structured rare-earth chromites RECrO3 via a mild hydrothermal method

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Abstract

Controllable synthesis of perovskite structured oxides with well-defined facets is a challenging but important route for crystal shape and facet dependent applications. In this paper, we report a urea-modified hydrothermal method for shape tuneable growth of perovskite structured rare-earth chromite (RECrO3) crystals. By adjusting the concentration of urea, continuous shape evolution processes of LaCrO3, PrCrO3 and NdCrO3 were found, such as transformation of LaCrO3 from cubic to truncated cubic and spherical crystals, PrCrO3 from pseudo-cubic to truncated parallelepiped plate twin crystals, and NdCrO3 from parallelepiped plates to their truncated analogues. The shape formation mechanism of each RECrO3 has been generally discussed by considering their structures and the interactions between the crystal facets and shape directing agents. The crystal facet formation mechanism of RECrO3 crystals follows the Bravais–Friedel–Donnay–Harker theory. This paper provides a general shape controllable growth technique for RECrO3 crystals, which is important for further study and application of their anisotropic properties.

Graphical abstract: Shape tuneable synthesis of perovskite structured rare-earth chromites RECrO3 via a mild hydrothermal method

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Publication details

The article was received on 27 Aug 2017, accepted on 03 Oct 2017 and first published on 03 Oct 2017


Article type: Paper
DOI: 10.1039/C7CE01555K
Citation: CrystEngComm, 2017, Advance Article
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    Shape tuneable synthesis of perovskite structured rare-earth chromites RECrO3 via a mild hydrothermal method

    S. Wang, X. Wu, L. Yuan, C. Zhang and D. Lu, CrystEngComm, 2017, Advance Article , DOI: 10.1039/C7CE01555K

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