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Germanium selenide : ウィキペディア英語版
Germanium selenide

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Germanium selenide is a chemical compound with the formula GeSe. It exists as black crystalline powder having orthorhombic (distorted NaCl-type) crystal symmetry; at temperatures ~650 °C, it transforms into the cubic NaCl structure.
To grow GeSe crystals, GeSe powder is vaporized at the hot end of a sealed ampule and allowed to condense at the cold end. Usual crystals are small and show signs of irregular growth, caused mainly by convective motion in the gaseous medium. However, GeSe grown under condition of zero-gravity and reduced convection aboard the Skylab are ~10 times larger than Earth-grown crystals, and are free from visual defects.〔(【引用サイトリンク】 SP-400 Skylab, Our First Space Station )
==References==


抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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