Phosphate minerals

taixyz1992 Sun Dec 05, 2010 11:16 pm

Phosphate minerals are those minerals that contain the tetrahedrally coordinated phosphate (PO43-) anion along with the freely substituting arsenate (AsO43-) and vanadate (VO43-). Chlorine (Cl-), fluorine (F-), and hydroxide (OH-) anions also fit into the crystal structure.

The phosphate class of minerals is a large and diverse group, however, only a few species are relatively common.

Phosphate minerals include:

* triphylite Li(Fe,Mn)PO4
* monazite (Ce,La,Y,Th)PO4
* Apatite group Ca5(PO4)3(F,Cl,OH)
o hydroxylapatite Ca5(PO4)3OH
o fluorapatite Ca5(PO4)3F
o chlorapatite Ca5(PO4)3Cl
o bromapatite
* hinsdalite PbAl3(PO4)(SO4)(OH)6
* pyromorphite Pb5(PO4)3Cl
* vanadinite Pb5(VO4)3Cl
* erythrite Co3(AsO4)2·8H2O
* amblygonite LiAlPO4F

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