apatite – מילון אנגלי-אנגלי
apatite
n.
mineral
Apatite
Apatite is a group of
phosphate minerals, usually referring to
hydroxylapatite,
fluorapatite and
chlorapatite, with 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 Ca
10(PO
4)
6(OH)
2, Ca
10(PO
4)
6(F)
2 and Ca
10(PO
4)
6(Cl)
2.
apatite
Noun
1. a common complex mineral consisting of calcium fluoride phosphate or calcium chloride phosphate; a source of phosphorus
(hypernym) mineral
(hyponym) fluorapatite
(substance-meronym) phosphorus, P, atomic number 15
apatite
nm.
apatite, mineral
Apatite
(n.)
Native phosphate of lime, occurring usually in six-sided prisms, color often pale green, transparent or translucent.
Webster's Revised Unabridged Dictionary (1913), edited by Noah Porter.
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