Name | APATITE |
Synonyms | APATITE Apatite, naturally occurring mineral, grains, approximately 0.06-0.19in |
CAS | 64476-38-6 |
Molecular Formula | Ca5FO12P3 |
Molar Mass | 504.3 |
Storage Condition | Room Temprature |
MDL | MFCD00285511 |
Physical and Chemical Properties | Chemical properties Apatite can be divided into fluorapatite, chlorapatite, and hydroxyapatite according to the types of additional anions. Sometimes the additional anions are mainly (CO3)2-, which is called carbon apatite, of which fluorapatite is the most common. Hexagonal crystal system, the crystals are often hexagonal columnar aggregates, which are massive, granular or nodular. Due to the different colors of impurities, there are gray-green, light green, blue-green, blue-purple, light red, red-brown, yellow, etc. The pure ones are colorless and transparent, and light green and gray-green are more common. Glass luster, grease luster on fracture, white streak. Hardness 5, density 3.18~3.41g/cm3. Insoluble in water, it emits phosphorescence after heating, and the smell of burning fur when rubbed. Apatite is a phosphate mineral widely distributed in the earth's crust, which can be formed in endogenous, exogenous and metamorphic processes. About 95% of phosphorus in nature is concentrated in apatite. |
Use | See phosphorite for use ". In addition, fluorapatite crystals are ideal laser-emitting materials and have been used in phosphate glass lasers; They can also be used as ion exchangers for isotope separation. Phosphate rock associated with vanadium, titanium, iron, rare earth, strontium, uranium, iodine, fluorine and other elements reached a certain content can be comprehensive recycling. |
Reference Show more | 1. [IF=4.223] Liu Chi et al."Effect of application mode (capping and amendment) on the control of cadmium release from sediment by apatite/calcite mixture and its phosphorus release risk."Environ Sci Pollut R. 2022 Apr;:1-16 |
the mining method and process flow are the same as those of phosphorite. Due to the thick particle size and good floatability of phosphorus minerals in magmatic apatite ore and metamorphic phosphate limestone ore, phosphorus minerals can be directly obtained by positive flotation method, and iron minerals in ore can be recovered by phosphorus separation method. The general beneficiation process is the same as phosphorite. The Maying Phosphate Mine in Chengde City, Hebei Province is a magmatic apatite mine, and its flotation process is one roughing, one sweep, and two selections; the flotation foam product is phosphorus concentrate; the middle ore is magnetically separated to obtain vanadium iron concentrate.