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Strontium [Sr] locate me
CAS-ID: 7440-24-6
An: 38 N: 50
Am: 87.62 g/mol
Group No: 2
Group Name: Alkaline earth metal
Block: s-block  Period: 5
State: solid at 298 K
Colour: silvery white Classification: Metallic
Boiling Point: 1655K (1382°C)
Melting Point: 1050K (777°C)
Density: 2.64g/cm3
Discovery Information
Who: A. Crawford
When: 1790
Where: Scotland
Name Origin
From Strontian a small Scottish town.
 "Strontium" in different languages.
Sources
Found in minerals celestite (SrSO4) and strontianite (SrCO3). Primary producers are China, the UK, Tunisia, Russia, Germany, Mexico and the USA. Around 137 thousand tons are produced annually.
Abundance
 Universe: 0.04 ppm (by weight)
 Sun: 0.05 ppm (by weight)
 Carbonaceous meteorite: 8.9 ppm
 Earth's Crust: 360 ppm
 Seawater:
   Atlantic surface: 7.6 ppm
   Atlantic deep: 7.7 ppm
   Pacific surface: 7.6 ppm
   Pacific deep: 7.7 ppm
 Human:
   4600 ppb by weight
   330 ppb by atoms
Uses
Used in flares and fireworks for its crimson colour. It's primary use is glass for colour television cathode ray tubes, but it is also used in nuclear batteries in buoys, some sensitive teeth toothpastes (as SrCl2), magnets, zinc refining and phosphorescent paint.
Strontium titanate (SrTiO3) has an extremely high refractive index and an optical dispersion greater than that of diamond, making it useful in a variety of optics applications.
History
The mineral strontianite (SrCO3) is named after the Scottish village of Strontian having been discovered in the lead mines there in 1787. Adair Crawford recognized it as differing from other barium minerals in 1790. Strontium itself was discovered in 1798 by Thomas Charles Hope, and metallic strontium was first isolated by Sir Humphry Davy in 1808 using electrolysis.
Notes
Strontium was first isolated by Sir Humphry Davy in 1808.
Hazards
In its pure form strontium is extremely reactive with air and spontaneously combusts, it is therefore considered to be a fire hazard.