云母

To this class of substance belong mica, porcelain, quartz, glass, wood, etc.

属于这类物质的有云母 、 瓷器 、 石英 、 玻璃 、 木材等等。

Pitchblende and chalcolite are much more radioactive than uranium itself.

沥清铀矿和铜铀云母比纯铀的放射性强得多。

It could not pass through material impervious to water such as mica.

它不能通过云母这样的不透水的物质。

The mica test pieces were prepared by cleavage so as to be atomically smooth.

云母试样是用劈裂的方法制备的，因此可以达到原子级的平滑程度。

Sand mineralogy of soils constitutes varying proportions of mica, quartz and feldspars.

砂质土壤矿物质由各种比例的云母 、 石英和长石组成。