1 Facts
1.1 Interesting Facts
- Strontium element is softer than Calcium.
- Silvery Strontium turns yellow, if exposed to air.
- Hafnium metal is highly reactive, hence not found free in nature.
- Hafnium metal as predicated after Mendeleev finished his periodic table.
1.2 Sources
Found in Minerals, Mining, Ores of Minerals
By-product Zirconium Refining
1.3 History
1.3.1 Who Discovered
William Cruickshank
Dirk Coster and George de Hevesy
1.3.2 Discovery
1.4 Abundance
1.4.1 Abundance In Universe
4 * 10-6 %7 * 10-8 %
5E-09
0.11
1.4.2 Abundance In Sun
~0.000005 %~0.0000001 %
1E-08
0.1
1.4.3 Abundance In Meteorites
1.4.4 Abundance In Earth's Crust
1.4.5 Abundance In Oceans
1.4.6 Abundance In Humans