hafnium是什么意思？

hafnium

英[ˈhæfniəm] 美[ˈhæfniəm]

• n. 铪；

例句

• Chemical form of hafnium is perchlorate or nitrate. 铪的化学形态为过氯酸盐或硝酸盐.
• And how is it known that Mars had hafnium - 187 ? 那么是如何知道火星有铪 -187 的 呢 ?
• This activator is acyl amine - the hafnium activator that ether is a foundation. 该催化剂为酰胺 - 醚为基础的铪催化剂.

英英词典释义

• Noun
  1. a gray tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons

行业词典

• 医学： 铪：原子序数72，原子量178.49，符号Hf，1923年丹麦Coster和Hevesy在锆石内发现；