A salt or ester of sulphuric acid, containing the anion SO42− or the divalent group —OSO2O—.
- It occurs in all kinds of minerals, such as oxides, carbonates, nitrates, sulfates, and phosphates.
- Organic sulfates are esters and are formed by reacting an alcohol with cold sulfuric acid or by the reaction of sulfuric acid with a double bond in an alkene.
- The technique can identify iron-bearing phases (such as oxides, silicates, sulfides, sulfates, and carbonates), as well as the amount of iron in each phase and the presence of iron in various oxidation states.
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