Cassiopeium

Japanese: カシオペイウム - かしおぺいうむ
Cassiopeium

…Periodic table Element symbol = Lu Atomic number = 71 Atomic weight = 174.967 Abundance in the earth's crust = 0.50 ppm (58th place) Abundance ratio of stable nuclides 175 Lu = 97.40%, 176 Lu = 2.60% Melting point = 1652°C Boiling point = 3327°C Specific gravity = 9.872 Electron configuration = [Xe] 4f 14 5d 1 6s 2 Main oxidation number = III A lanthanide belonging to the rare earth elements of group IIIA of the periodic table. In 1907, G. Urbain of France discovered a new element from ytterbium, which was thought to be a single element, and named it lutetium after the ancient Latin name of Paris, Lutetia. At almost the same time, CFA von Welsbach of Austria also discovered the same new element and named it cassiopeium. After various processes, lutetium is now the official name. …

*Some of the terminology that mentions "Cassiopeium" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…周期表元素記号=Lu 原子番号=71原子量=174.967地殻中の存在度=0.50ppm(58位)安定核種存在比 175Lu=97.40%,176Lu=2.60%融点=1652℃ 沸点=3327℃比重=9.872電子配置=[Xe]4f145d16s2 おもな酸化数=III周期表第IIIA族の希土類元素に属するランタノイドの一つ。1907年フランスのG.ユルバンは単一と思われていたイッテルビウムから新元素を発見し,パリのラテン古名Lutetiaにちなんでルテチウムと命名したが,ほとんど同じころオーストリアのC.F.A.vonウェルスバハも同じ新元素を発見し,カシオペイウムcassiopeiumと命名した。その後いろいろな過程があったが,現在ではルテチウムが正式名として採用されている。…

※「カシオペイウム」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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