For detailed physical properties, see sulfide mineral.
Many reactions produce a gas such as carbon dioxide, hydrogen sulfide (H2S), ammonia (NH3), or sulfur dioxide (SO2).
Chalcocite, sulfide mineral that is one of the most important ores of copper.
The final solution, which contains 30 100 grams per litre (4 13 ounces per gallon) of iodine, is treated with sulfuric acid in order to decompose any sulfite, and sulfide and manganese dioxide are added to release iodine, which is vaporized and purified by sublimation.
Feldspathoid, any of a group of alkali aluminosilicate minerals similar to the feldspars in chemical composition but either having a lower silica-alkali ratio or containing chloride, sulfide, sulfate, or carbonate.
One example of an exothermic reaction is the oxidation of iron sulfide (FeS) to form iron oxide (FeO) and sulfur dioxide (SO2) gas: This process gives off large quantities of heat beyond that required to initiate the reaction.
Sulfur is normally present in solidified steel in the form of manganese sulfide inclusions, which are soft at hot-rolling temperatures and are rolled into long strings or platelets.
Chalcopyrite (Cu2Fe2S4) is a member of a group of sulfide minerals that crystallize in the tetragonal system; the group also includes stannite.
Sediments near Cape al-Ḥadd (the easternmost headland of the Arabian Peninsula), where upwelling of deep water occurs in summer, consist of fine greenish mud with a high organic content containing hydrogen sulfide.
Treatment of hydrogen sulfide in the gas yields about 700,000 tons of sulfur annually, making Lacq one of the world's largest sulfur producers and exporters.
The most important sulfide sources, the copper-cobalt ores of Congo (Kinshasa) and Zambia, are processed in the conventional manner to produce a copper-cobalt concentrate.
