Hydrothermal crystal growth of perovskite-type fluorides |
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| Authors: | Shigeyuki S¯omiya Shin -Ichi Hirano Masahiro Yoshimura Kazumichi Yanagisawa |
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| Affiliation: | (1) Laboratory for Hydrothermal Syntheses, Research Laboratory of Engineering Materials and Department of Material Science and Engineering, Tokyo Institute of Technology, Nagatsuta, Midori, 227 Yokohama, Japan;(2) Present address: Synthetic Crystal Research Laboratory, Faculty of Engineering, Nagoya University, 1 Furo-cho, Chikusa, 464 Nagoya, Japan |
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| Abstract: | Single crystals of perovskite-type fluorides were grown from potassium fluoride and di-valent metal chloride solutions by
a hydrothermal method under a temperature gradient, at maximum temperature 600° C and pressure 98 MPa. Single-crystal cubes
of KMnF3, KFeF3, KCoF3 and KZnF3, of cube edge sizes ranging from 0.2 to 2.0 mm, were grown. Crystals of KNiF3 grew in rectangular prisms and those of KCdF3 in anhedral form. Single crystals of KCuF3 were grown in pure water from co-precipitated KCuF3 powder. KMgF3 crystals were not grown by this method. |
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