M Center - Emchuushin

Japanese: M 中心 - えむちゅうしん
M Center - Emchuushin

…An F center is an electron captured at a negative ion vacancy, and color appears due to the optical transition of this electron. There are many other types of color centers, such as the M center, which is made up of two adjacent F centers, and the V center, which is made up of a hole captured at a positive ion vacancy. Color centers are also known in various ionic crystals. …

*Some of the terminology explanations that mention "M center" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…F中心は負イオンの空格子点に電子が捕獲されたもので,この電子の光遷移によって色が出現する。このほかにもF中心が2個隣接したM中心,陽イオン空格子点に正孔が捕獲されたV中心など多種の着色中心がある。また,各種のイオン結晶にも着色中心が知られている。…

※「M 中心」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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