thulium[5Wju:liEm]n.[化] 铥, 稀土金属元素, 符号 Tm, 铥原子序 69thuliumthu.li.umAHD:[th›“l¶-…m, thy›“-] D.J.[6Gu8li8*m, 6Gju8-]K.K.[6Guli*m, 6Gju-]n.Symbol Tm (名词)符号 Tm A bright, silvery rare-earth element obtained commercially from monazite, having an x-ray emitting isotope that is used in small portable medical x-ray units. Atomic number 69; atomic weight 168.934; melting point 1,545=C; boiling point 1,727=C; specific gravity 9.3; valence 2, 3.See table at element 铥:一种商业上可从独居石中提取的亮银色稀土元素。它有一种可以释放X射线的同位素,用于小型便携式医疗X射线设备。原子数69;原子量168.934;熔点1.545=C;沸点1.727=C;比重9.3;化合价2,3参见 elementAfter Thule 1源自 Thule1thulium[5Wu:lIEm]n.〈化〉铥(元素符号为: Tm)