beryllium

1.Microgram for microgram, beryllium is one of the most toxic elements on the periodic table.

微克，又是微克，铍是周期表上最有毒的元素之。

2.Beryllium element occurs in sericitization-kaolinization syenogranite as bertrandite single ore, and distributes in sericite as seperated type occurrence.

铍元素以羟硅铍石单矿物赋存于绢云母高岭长花岗岩中,其次呈分散状态分布于绢云母中。