...Five types of stable isotopes and eleven types of radioactive nuclides are known, ranging from 65 Ge to 77 m Ge. Its existence was predicted by DI Mendeleev in 1871 and named eka-silicon, but in 1886 CA Winkler discovered it in argyrodite (Ag 8 GeS 6 ) and named it after the Latin name of Germany, Germania. Because it is similar to silicon, it is widely present in the earth's crust, replacing silicon in silicates, and is also found in sulfide minerals containing copper and zinc, and in coal, but there are few minerals that are mainly made of germanium, and its content in the earth's crust is about 7 parts per million. ... *Some of the terminology explanations that mention "Eka Silicon" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…安定同位体として5種,放射性核種としては65Geから77mGeまでに11種が知られている。1871年D.I.メンデレーエフによりその存在が予言されエカケイ素と名づけられたが,86年にC.A.ウィンクラーによって硫銀ゲルマニウム鉱argyrodite(Ag8GeS6)から発見され,ドイツのラテン名Germaniaにちなんで命名された。ケイ素に似ているため,地殻中のケイ酸塩のケイ素と置換して広く存在し,また銅や亜鉛などを含む硫化鉱物や石炭の中にも含まれるが,ゲルマニウムを主体とする鉱物は少なく,地殻中の含有量は1万分の7%くらいである。… ※「エカケイ素」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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