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、硫酸鈣

　　1. Calcium Sulfate

　　自然界中的硫酸鈣以石膏礦的形式存在。含有兩個結晶水的硫酸鈣（CaSO4·2H2O）叫做石膏（也叫生石膏）。將石膏加熱到150℃，就會失去大部分結晶水而變成熟石膏（2CaSO4·H2O）。熟石膏與水混合成糊狀后會很快凝固，轉化為堅硬的生石膏。利用石膏的這一性質，人們常利用它制作各種模型和醫療上用的石膏繃帶。在水泥生產中，可用石膏調節水泥的凝固時間。在石膏資源豐富的地方可以用它來制硫酸。

　　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、硫酸鋇

　　2. Barium Sulfate

　　天然的硫酸鋇稱為重晶石，它是制取其他鋇鹽的重要原料。硫酸鋇不容易被X射線透過，在醫療上可用作檢查腸胃的內服藥劑，俗稱“鋇餐”。硫酸鋇還可以用作白色顏料，并可做油漆、油墨、造紙、塑料、橡膠的原料及填充劑。

　　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、硫酸亞鐵

　　3. Ferrous sulfate

　　硫酸亞鐵的結晶水合物俗稱綠礬（FeSO4·7H2O）。在醫療上硫酸亞鐵可用于生產防治缺鐵性貧血的藥劑，在工業上硫酸亞鐵還是生產鐵系列凈水劑和顏料氧化紅鐵（主要成分為Fe2O3）的原料。

　　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).

　　以上三點就是常見的幾種重要的硫酸鹽，小編只介紹了其中的一小部分，如果您還想了解更多信息可多多關注本站。

　　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.