銩,化學元素也,符號為Tm,原子序六十九。屬鑭系元素、稀土金屬。氧化態以正三為最常,見諸氧化物、鹵化物等;以其電子殼幾滿故,正二亦穩。在水中,合九水分子而成配合物。
一八七九年,瑞典化學家克勒韋(Per Teodor Cleve)初得氧化銩。一九一一年,始提純銩金屬。
稀土金屬,其惟次稀,僅豐於鉕。蓋銩色澤銀灰,便於取用,庶幾無毒。性柔軟、遇氧漸暗。雖量少價昂,仍作輻射源,用諸流動倫琴射線(X-ray)儀、固態激光儀等。
聲音動静,具錄於維基共享︰銩 |
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