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Strontium carbonate



Strontium carbonate
IUPAC name Strontium Carbonate
Identifiers
CAS number 1633-05-2
Properties
Molecular formula SrCO3
Molar mass 147.63 g/mol
Appearance White or Grey powder
Odor Odorless
Density 3.5 g/cm3 at 20°C (68°F)
Melting point

1100 (decomp into (SrO + CO2)

Solubility in water Practically insoluble
Hazards
MSDS External MSDS data
NFPA 704
0
1
0
 
Flash point Not applicable
Except where noted otherwise, data are given for
materials in their standard state
(at 25 °C, 100 kPa)

Infobox disclaimer and references

Strontium carbonate (SrCO3) is the carbonate salt of strontium that has the appearance of a white or grey powder. It occurs in nature as the mineral strontianite.

Additional recommended knowledge

Contents

Chemical properties

Strontium carbonate is a white, odorless, tasteless powder. It's chemical makeup is: C 8.14% O 32.51% Sr 59.35%. Being a carbonate, it is a weak base and therefore is reactive with acids. It is otherwise stable and safe to work with. It is practically insoluble in water (1 part in 100,000). The solubility is increased significantly if the water is saturated with CO2, to 1 part in 1,000. It is soluble in dilute acids.

Preparation

Other than the natural occurrence as a mineral, strontium carbonate is prepared synthetically in one of two manners. First of which is from naturally occurring celestine also known as strontium sulfate (SrSO4) or by using soluble strontium salts by the reaction in solution with a soluble carbonate salt (usually sodium or ammonium carbonates). For example if sodium carbonate was used in solution with Strontium nitrate.

	Sr(NO3)2 (aq) + Na2CO3 (aq) → SrCO3 (s) + 2 NaNO3 (aq)

Uses

  The most common use is as an inexpensive colorant in fireworks. Strontium and its salts emit a brilliant red color in flame. Unlike other strontium salts, the carbonate salt is generally preferred because of its cost and the fact that it is not hygroscopic. Its ability to neutralize acid is also very helpful in pyrotechnics. Another similar application is in road flares.

Strontium carbonate is used for electronic applications. It is used for manufacturing CTV to absorb electrons resulting from the cathode.

It it used in the preparation of iridescent glass, luminous paints, strontium oxide or strontium salts and in refining sugar.

It is also used in the manufacturing of strontium ferrites for permanent magnets which are used in loud speakers and door magnets.

Because of its status as a weak Lewis base, strontium carbonate can be used to produce many different strontium compounds by simple use of the corresponding acid.

See also

 
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Strontium_carbonate". A list of authors is available in Wikipedia.
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