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Issue 4, 2018
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Mineralizer effect on facet-controllable hydrothermal crystallization of perovskite structure YbFeO3 crystals

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Abstract

Mineralizer is a key factor in the hydrothermal crystallization of most metal oxide materials. However, the effect of mineralizer on crystal facet growth is not well understood. Herein, YbFeO3 is taken as a model compound to determine the effect of mineralizer on its shape evolution during a mild hydrothermal crystallization process. By adjusting the concentration and ratio of NaOH and KOH, the shapes of YbFeO3 crystals showed two different facet formation routes: NaOH stabilizes {110} and {002} facets, while KOH stabilizes {101} facets. The percentage of each family of crystal facets could be tailored by changing the concentrations of mineralizer and NH4+. The shape formation mechanism of YbFeO3 was analyzed based on Bravais–Friedel–Donnay–Harker theory, in addition to their facet structures and interactions between crystal facets and Na+, K+ and NH4+. This study will not only improve understanding of the role of mineralizers in oxide crystallization, but also provide a crystal facet controllable method for the hydrothermal synthesis of oxide materials with potential anisotropy applications.

Graphical abstract: Mineralizer effect on facet-controllable hydrothermal crystallization of perovskite structure YbFeO3 crystals

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Publication details

The article was received on 20 Oct 2017, accepted on 11 Dec 2017 and first published on 13 Dec 2017


Article type: Paper
DOI: 10.1039/C7CE01827D
Citation: CrystEngComm, 2018,20, 470-476
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    Mineralizer effect on facet-controllable hydrothermal crystallization of perovskite structure YbFeO3 crystals

    J. Zhang, K. Huang, L. Yuan and S. Feng, CrystEngComm, 2018, 20, 470
    DOI: 10.1039/C7CE01827D

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