Strontium carbonate
- Strontium Carbonate
- Strontianite
- Strontium carb
White, odorless solid
Fixed
3.74 g · cm -3
1497 ° C (6 MPa)
Decomposition above 1200 ° C
Very poor in water ( 0.01 g · l -1)
-1220.1 KJ / mol
Template: Infobox chemical / molecular formula search available
Strontium carbonate, also outdated Carbonate Strontium is the carbonate of strontium. It has the molecular formula SrCO3.
Occurrence
Strontium is found in nature as the mineral strontianite.
Representation
The preparation of strontium carbonate is made by fusing the mineral celestite ( SrSO4 ) with soda ( sodium carbonate):
Properties
Strontium is a fine white powder, which has properties similar to calcium carbonate. The salt used as starting material for obtaining the most strontium compounds.
Strontium carbonate does not dissolve in pure, but in carbon dioxide / carbonic acid -containing water. Here, Strontiumhydrogencarbonat forms:
In mineral acids arise from strontium carbonate soluble strontium salts. Observing the formation of carbon dioxide, which further decomposes into water and carbon dioxide.
At 1268 ° C under normal atmospheric pressure, the chemical compound splits into strontium oxide and carbon dioxide:
If you increase the air pressure to 70 bar, as strontium carbonate melts at 1497 ° C.
Use
Strontium carbonate is used in ferrite and used in color television tubes as absorbers for X-rays. Electrolytic zinc can be cleaned with strontium. In addition, it is in glazes and because of the red flame color in pyrotechnics use.
In medicine, it was previously occasionally used to treat schizophrenia. Because of the availability verträglicherer means it is no longer being applied. Today, the substance only in homeopathy under the name Strontium carb in use, for example in osteoarthritis and cerebral sclerosis.
In organic synthesis strontium carbonate may be used together with hydrogen and palladium for the selective reduction of double bonds.
Swell
- Carbonate
- Strontium compound