Facts About Thallium and Hafnium
Interesting Facts
- Compounds of Thallium metal are highly Toxic.
- Thallium metal is being suspected as a human carcinogen.
- Hafnium metal is highly reactive, hence not found free in nature.
- Hafnium metal as predicated after Mendeleev finished his periodic table.
Sources
Found As a By-product, Ores of metals, Ores of Minerals
By-product Zirconium Refining
Who Discovered
William Crookes
Dirk Coster and George de Hevesy
Discovery
In 1861
In 1922
Abundance In Earth's Crust