Oxygenated salt

This category includes oxyacids (complex anions) [SO 4 ] 4- [BO 3 ] 3- [AsO 4 ] 3- [PO 4 ] 3- [SO 4 ] 2- [CO 3 ] 2- [CrO 4 ] 2- ......

Minerals and metal salts consisting of cations, accounting for about two-thirds of their known mineral, the crust is the most widely distributed and the most common minerals, some of which are important industrial and agricultural mineral raw materials, such as apatite Stone, asbestos , mica , ice stone , black tungsten mine... Some are rock-forming minerals of various types of rocks, with the most silicates in oxygenated rocks, followed by carbonates, sulfates and phosphates. .

In the crystal structure of oxygen-bearing rocks, the complex anion is an independent structural unit, and the internal comonomer is dominated by a covalent bond. When the complex anion is combined with an external cation, it is mainly linked by an ionic bond. Therefore, many physical properties of oxygen-bearing rocks exhibit the characteristics of ionic lattices, such as not wearing diamond luster, generally glass luster, a few are diamond luster, non-conducting and difficult to transfer heat, and anhydrous oxygen-containing rocks generally have higher hardness. , difficult to dissolve and not easy to melt. The water-containing oxygen-containing rock has a small hardness.

According to the different types of complex anions, the oxygen-containing rocks are divided into the following categories:

First, silicate

Second, borate

Third, phosphate, arsenate , vanadate

4. Sulfate

Five, tungstate, molybdate

Hexamate

Seven, carbonate

Eight, nitrate

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