Perfect crystal

Japanese: 完全結晶 - かんぜんけっしょう（英語表記）perfect crystal

A crystal with ideal regularity that does not contain lattice defects such as impurities or dislocations. Because there is no scattering due to lattice defects, electrons have high mobility and good electrical conductivity. In addition, because the plasticity of a crystal is due to the movement of dislocations, perfect crystals have high mechanical strength. Since real crystals contain some kind of lattice defects, these properties change significantly, and the degree of crystal perfection can be estimated from these properties. For example, crystals that are close to perfect crystals, such as whisker crystals, can be obtained by special crystal growth.

Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information

Japanese:

結晶の中に不純物，転位などの格子欠陥を含まない理想的な規則性をもつ結晶。格子欠陥による散乱がないので電子は高い移動度をもち，電気伝導性がよい。また結晶の塑性は転位の運動によるので，完全結晶では機械的強度が高い。現実の結晶にはなんらかの格子欠陥が存在するので，これらの性質が大きく変り，この性質から結晶の完全度が推定できる。たとえば特殊な結晶成長によってひげ結晶のような完全結晶に近い結晶が得られる。

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