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Apatite
mineral group
The Apatite mineral group is compromised of isomorphous hexagonal
minerals. The members of this group intermingle with one another,
within limits.
The formula of the group is:
X
5 (
Y ) 3 Z
X = any of a
group of metals *
Y = Phosphate (PO4), Arsenic (AsO4),
Vanadium (VO4), or Carbonate (CO3).
Z = Fluorine (F),
Chlorine (Cl), or Hydroxyl (OH)
The most common member is Apatite,
which is a group in itself containing three minerals:
| Fluorapatite | Ca5(PO4)3F |
| Chlorapatite | Ca5(PO4)3Cl |
| Hydroxylapatite | Ca5(PO4)3OH |
Three other famous members of the Apatite mineral group discussed in this guide:
| Pyromorphite | Pb5(PO4)3Cl |
| Mimetite | Pb5(AsO4)3Cl |
| Vanadinite | Pb5(VO4)3Cl |
Other rare members include:
| Alforsite | Ba5(PO4)3Cl |
| Belovite | Sr3Na(Ce,La)(PO4)3Cl |
| Belovite-La | Sr3Na(La,Ce)(PO4)3Cl |
| Carbonate-fluorapatite | Ca5([PO4],[CO3])3Cl |
| Carbonate-hydroxylapatite | Ca5([PO4],[CO3])3OH |
| Fermorite | (Ca,Sr)5([P,As]O4)3OH |
| Fluorcaphite | (Ca,Sr,Ce,Na)5(PO4)3F |
| Hedyphane | Pb3Ca2(AsO4)3Cl |
| Johnbaumite | Ca5(AsO4)3Cl |
| Morelandite | (Ba,Ca,Pb)5([As,P]O4)3Cl |
| Strontiumapatite | (Sr,Ca)5(PO4)3(OH,F) |
| Svabite | Ca5(AsO4)3F |
| Turneurite | Ca5([As,P]O4)3Cl |
* Calcium (Ca), Lead (Pb), Barium (Ba), or Strontium (Sr)
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