...In group IIA, the beryllium mineral is beryl Be 3 Al 2 Si 6 O 18. In group IIIA, the rare earth element minerals are monazite CePO 4 (Ce is a light rare earth element), xenotime YPO 4 (Y is yttrium and a heavy rare earth element), actinide element minerals are thorite ThSiO 4 and uraninite UO 2. In group IVA, the zirconium and hafnium minerals are zircon ZrSiO 4 and hafnon HfSiO 4. ... *Some of the terminology explanations that mention "thorite" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…IIA族ではベリリウムの鉱物で緑柱石Be3Al2Si6O18等。IIIA族では希土類元素の鉱物でモナザイトCePO4(Ceは軽希土類元素),ゼノタイムYPO4(Yはイットリウムおよび重希土類元素),アクチノイド元素の鉱物でトール石thorite ThSiO4,センウラン鉱UO2等。IVA族ではジルコニウム,ハフニウムの鉱物でジルコンZrSiO4,ハフノンhafnon HfSiO4等。… ※「thorite」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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