…In terms of chemical properties, such as ionization tendency, mercury, copper, and other noble metals are also included. Gold, silver, and copper belong to the same group Ib in the periodic table, and have been used as coinage metals since ancient times. Currently, gold, silver, and platinum are used in crafts, ornaments, jewelry, medals, and other items handled by precious metal dealers, but they are not only used as pure metals, but also as alloys with other platinum group metals, copper, nickel, etc. … [Metal] …For decorative purposes, gold, silver, platinum and their alloys are called precious metals. Gold, silver and copper are also called coinage metals because they are used as currency. *Some of the terminology that refers to "coinage metal" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…化学的性質の一つであるイオン化傾向から分類すると,上記の金属のほかに水銀,銅なども貴金属noble metalに含まれる。金,銀,銅は周期表では同じIb族に属し,古代から貨幣用金属coinage metalとして使われた。現在,貴金属商が取り扱う工芸品,装飾品,装身具,メダルなどは金,銀,白金が用いられるが,純金属だけでなく,他の白金族金属,銅,ニッケルなどとの合金も使われる。… 【金属】より…装飾的な用途では金,銀,白金およびその合金を貴金属precious metalという。金,銀,銅は貨幣として用いられるところから貨幣金属coinage metalとも呼ばれる。 ※「coinage metal」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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