And how is it known that Mars had hafnium-187?

那么是如何知道火星有铪- 187的呢？

Chemical form of hafnium is perchlorate or nitrate.

铪的化学形态为过氯酸盐或硝酸盐。

Mainly because the quantity of hafnium, utilized in one chip, is negligibly small.

这主要是因为数量的铪，利用一个芯片，是微乎其微的小。

Specifically, the present invention provides a metal stack comprising a hafnium-based dielectric;

具体地，本发明提供的金属叠层包括：铪基介质；

The extraction separation process for zirconium and hafnium with MIBK was briefly reviewed in this paper.

简要评述了用甲基异丁基酮（ MIBK） 萃取分离锆铪方法的基本原理、分离工艺和条件、萃取设备。