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apatite-gemstone

http://resource.geosciml.org/classifier/cgi/commodity-code/apatite-gemstone

definition Apatite is a group of phosphate minerals, usually referring to hydroxylapatite, fluorapatite and chlorapatite, named for high concentrations of OH−, F− and Cl− ions, respectively, in the crystal. The formula of the admixture of the four most common endmembers is written as Ca10(PO4)6(OH,F,Cl)2, and the crystal unit cell formulae of the individual minerals are written as Ca10(PO4)6(OH)2, Ca10(PO4)6(F)2 and Ca10(PO4)6(Cl)2. more like this
notation
01.03.02 more like this
ApatGe more like this
source http://en.wikipedia.org/wiki/Apatite more like this
type
Resource original
Concept original
broader
http://resource.geosciml.org/classifier/cgi/commodity-code/gemstones original
narrower apatite-gemstone original
in scheme commodity-code original
is primary topic of apatite-gemstone