Strontium sulfate
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| Strontium sulfate | |
|---|---|
| IUPAC name | Strontium Sulfate |
| Identifiers | |
| CAS number | [7759-02-6] |
| Properties | |
| Molecular formula | SrSO4 |
| Molar mass | 183.68 g/mol |
| Appearance | White or Grey powder |
| Odor | Odorless |
| Density | 3.96 g/cm3 |
| Melting point |
1605 °C, 1878 K, 2921 °F |
| Boiling point |
- (Decomposition) |
| Solubility in water | Ksp = 3.8E-7 |
| Hazards | |
| MSDS | External MSDS data |
| Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references |
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Strontium sulfate (SrSO4) is the sulfate salt of strontium. It is a white, odorless, crystalline powder. It occurs in nature as the mineral celestine.
[edit] Chemical Properties
It is soluble in water to the extent of 1 part in 8,800. It is more soluble in dilute HCl and nitric acid and appreciably soluble in alkali chloride solutions (e.g. sodium chloride).
[edit] Occurrence in Biology
Crystallized strontium sulfate is utilized by a small group of radiolarian protozoa, called the Acantharea, as a main constituent of their skeleton.
[edit] Uses
Like many strontium compounds, strontium sulfate will produce a bright red flame when burned. For this reason it is used in pyrotechnics. The primary difference is that because of the sulfate ion this compound can be used as a high-temperature oxidizer. Thus the oxidizing function will not activate till certain heat levels. These heat levels are commonly found in thermite mixtures, which are mixtures of a metallic fuel, usually magnesium or aluminum, and an oxidizer. It is also used in ceramics.
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