-
Fluorapatite,
often with the
alternate spelling of fluoroapatite, is a
phosphate mineral with the
formula Ca5(PO4)3F (calcium fluorophosphate). Fluorapatite...
-
Apatite is a
group of
phosphate minerals,
usually hydroxyapatite,
fluorapatite and chlorapatite, with high
concentrations of OH−, F− and Cl− ion, respectively...
- "phosphate rock" with
acids ("acidulation").
Using phosphoric acid,
fluorapatite is
converted to Ca(H2PO4)2: Ca5(PO4)3F + 7 H3PO4 → 5 Ca(H2PO4)2 + HF...
- group. The OH− ion can be
replaced by
fluoride or chloride,
producing fluorapatite or chlorapatite. It
crystallizes in the
hexagonal crystal system. Pure...
-
fluorapatite + 5 H 2 SO 4 + 10 H 2 O ⟶ 5 CaSO 4 ⋅ 2 H 2 O
calcium sulfate dihydrate + HF + 3 H 3 PO 4 {\displaystyle {\underset {\text{
fluorapatite}}{{\ce...
- Metal-ceramics
Sintering Leucite Heat-pressing on
metal Leucite,
leucite &
fluorapatite All-ceramics
Sintering Leucite Heat-pressing Leucite,
lithium disilicate...
-
Francolite is a
carbonate rich
variety of the
mineral fluorapatite and is
present in most
sedimentary phosphorites. It has a
variable chemical composition...
- health. The
fluoride enhances the
strength of
teeth by the
formation of
fluorapatite, a
naturally occurring component of
tooth enamel.
Although sodium fluoride...
- of
sedimentary rocks is less than 0.2%. The
phosphate is
present as
fluorapatite Ca5(PO4)3F
typically in
cryptocrystalline m****es (grain
sizes < 1 μm)...
-
exist that are
industrially relevant sources of fluorine: fluorite,
fluorapatite, and cryolite.
Fluorite (CaF2), also
called fluorspar, is the main source...
