Sulfate minerals are salts formed by the combination of metal cations (including ammonium radicals) and sulfate radicals. Now let's take a look at some of the most important sulfates.
1. Calcium Sulfate
Calcium sulfate in nature exists in the form of gypsum ore. Calcium sulfate (CaSO4. 2H2O) containing two crystalline waters is called gypsum (also known as raw gypsum). When gypsum is heated to 150 C, it loses most of its crystalline water and becomes mature gypsum (2CaSO4 H2O). When hydrated gypsum is mixed with water, it solidifies quickly and turns into hard raw gypsum. Using this property of gypsum, people often use it to make various models and plaster bandages for medical use. In cement production, gypsum can be used to adjust the setting time of cement. It can be used to produce sulphuric acid where gypsum resources are abundant.
2. Barium Sulfate
Natural barium sulfate is called barite. It is an important raw material for making other barium salts. Barium sulfate is not easily transmitted by X-ray. It can be used as an oral medicine for examining the intestines and stomach in medicine, commonly known as "barium meal". Barium sulfate can also be used as white pigments and as raw materials and fillers for paints, inks, papermaking, plastics and rubber.
3. Ferrous sulfate
The crystalline hydrate of ferrous sulfate is commonly known as alum (FeSO4.7H2O). Ferrous sulphate can be used in medicine to prevent and cure iron deficiency anemia. Ferrous sulphate is also used in industry as raw material to produce iron series water purifier and red iron oxide (the main ingredient is Fe2O3).
The above three points are the common several important sulfates. The editor only introduces a small part of them. If you want to know more information, pay more attention to this site.