General Fluorapatite Information
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Chemical Formula: |
Ca5(PO4)3F |
Composition: |
Molecular Weight = 504.30 gm |
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Calcium 39.74 % Ca 55.60 % CaO |
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Phosphorus 18.43 % P 42.22 % P2O5 |
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Oxygen 38.07 % O |
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Fluorine 3.77 % F 3.77 % F |
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- % F -1.59 % -O=F2
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Ca5(PO4)3F |
IMA Status: |
Valid Species (Pre-IMA) 1860 |
Locality: |
Common world wide. Link to MinDat.org Location Data. |
Name Origin: |
Named as the fluorine end-member and from the Greek apatao - "I am misleading." |
Synonym: |
Apatite |
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ICSD 1709 |
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PDF 15-876 |
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Wilkeite |
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Fluorapatite Image |
Images:
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Fluorapatite Beryl Muscovite Apatite
Comments: Pink crystals of fluorapatite with pale blue beryl (aquamarine) on books of muscovite crystals.
Location: Nagar area, Gilgit district, Northern Areas, Pakistan.
Scale: 3 x 3 cm.
© Dan Weinrich |
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Images:
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Fluorapatite Quartz
Comments: Purple crystal of fluorapatite on slightly smoky quartz crystals. Former Dr. E.E. David and Houston Museum collections.
Location: Pech, Kunar Province, Nuristan, Afghanistan.
Scale: Crystal size 3.0 x 2.1 x 1.7 cm.
© Ed Rosenzweig |
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Images:
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Fluorapatite Crystallography
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Axial Ratios: |
a:c = 1:0.73492 |
Cell Dimensions: |
a = 9.367, c = 6.884, Z = 2; V = 523.09 Den(Calc)= 3.20 |
Crystal System: |
Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m |
X Ray Diffraction: |
By Intensity(I/Io): 2.8(1), 2.702(0.6), 2.772(0.55), |
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Crystal Structure:
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Hughes J M , Cameron M , Crowley K D , American Mineralogist , 74 (1989) p.870-876, Structural variations in natural F, OH, and Cl apatites, Locality: Durango Mexico
View Additional jPOWD Structure files for Fluorapatite
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Physical Properties of Fluorapatite
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Cleavage: |
[0001] Indistinct |
Color: |
Blue, Brown, Colorless, Violet, Green. |
Density: |
3.1 - 3.2, Average = 3.15 |
Diaphaniety: |
Transparent to Opaque |
Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. |
Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. |
Hardness: |
5 - Apatite |
Luminescence: |
Fluorescent and phosphorescent. |
Luster: |
Vitreous - Resinous |
Streak: |
white |
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Optical Properties of Fluorapatite
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Dichroism (e): |
colorless. |
Dichroism (w): |
colorless. |
Gladstone-Dale: |
CI meas= -0.024 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= -0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1973,KPDmeas= 0.2004,KC= 0.1958 |
Optical Data: |
Uniaxial (-), e=1.6325, w=1.63, bire=0.0025. |
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Calculated Properties of Fluorapatite
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Electron Density: |
relectron=3.17 gm/cc note: rFluorapatite =3.20 gm/cc. |
Fermion Index |
Fermion Index = 0.00071 Boson Index = 0.99929 |
Photoelectric: |
PEFluorapatite = 5.79 barns/electron U=PEFluorapatite x relectron= 18.38 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Fluorapatite is Not Radioactive |
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Fluorapatite Classification
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Dana Class: |
41.8.1.1 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen |
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(41.8)where (A)5 (XO4)3 Zq |
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(41.8.1)Dana Group |
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41.8.1.0 Apatite* Ca5(PO4)3(OH,F,Cl) P 63/m 6/m |
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41.8.1.1 Fluorapatite Ca5(PO4)3F P 63/m 6/m |
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41.8.1.2 Chlorapatite Ca5(PO4)3Cl P 63/m 6/m |
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41.8.1.3 Hydroxylapatite Ca5(PO4)3(OH) P 63/m 6/m |
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41.8.1.4 Carbonate-fluorapatite Ca5(PO4,CO3)3F P 63/m 6/m |
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41.8.1.5 Carbonate-hydroxylapatite Ca5(PO4,CO3)3(OH) P 63/m 6/m |
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41.8.1.6 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3 |
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41.8.1.6a Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3 |
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41.8.1.6b Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3 |
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41.8.1.7 Strontium-apatite (Sr,Ca)5(PO4)3(F,OH) P 63/m 6/m |
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41.8.1.8 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 63 6 |
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41.8.1.9 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3 |
Strunz Class: |
VII/B.39-10 VII - Phosphates, Arsenates and Vanadates |
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VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb |
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VII/B.39 - Apatite - Pyromorphite group |
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VII/B.39-10 Fluorapatite Ca5(PO4)3F P 63/m 6/m |
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VII/B.39-20 Chlorapatite Ca5(PO4)3Cl P 63/m 6/m |
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VII/B.39-30 Hydroxylapatite Ca5(PO4)3(OH) P 63/m 6/m |
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VII/B.39-40 Carbonate-hydroxylapatite Ca5(PO4,CO3)3(OH) P 63/m 6/m |
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VII/B.39-50 Carbonate-fluorapatite Ca5(PO4,CO3)3F P 63/m 6/m |
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VII/B.39-60 Svabite Ca5(AsO4)3F P 63/m 6/m |
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VII/B.39-70 Turneaureite Ca5[(As,P)O4]3Cl P 63/m 6/m |
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VII/B.39-80 Johnbaumite Ca5(AsO4)3(OH) P 63/m,P 63 Hex |
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VII/B.39-90 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 63/m 6/m |
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VII/B.39-95 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 63 6 |
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VII/B.39-100 Strontium-apatite (Sr,Ca)5(PO4)3(F,OH) P 63/m 6/m |
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VII/B.39-110 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3 |
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VII/B.39-115 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3 |
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VII/B.39-117 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3 |
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VII/B.39-120 Alforsite Ba5(PO4)3Cl P 63/m 6/m |
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VII/B.39-130 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 63/m,P 63 Hex |
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VII/B.39-140 Hedyphane Ca2Pb3(AsO4)3Cl P 63/m 6/m |
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VII/B.39-150 Pyromorphite Pb5(PO4)3Cl P 63/m 6/m |
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VII/B.39-160 Mimetite Pb5(AsO4)3Cl P 63/m 6/m |
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VII/B.39-165 Clinomimetite Pb5(AsO4)3Cl P 21/b 2/m |
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VII/B.39-170 Vanadinite Pb5(VO4)3Cl P 63/m 6/m |
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Other Fluorapatite Information
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References: |
NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8) |
See Also: |
Links to other databases for Fluorapatite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 -Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 -Athena
6 - Crocoite.com Mineral Locations
7 - EUROmin Project
8 - Franklin Minerals(Dunn)
9 - Glendale Community College
10 -Google Images
11 -Google Scholar
12 -Handbook of Mineralogy (UofA)
13 - HyperPhysics
14 -MinDAT
15 -MinMax(Deutsch)
16 -MinMax(English)
17 - Mineral and Gemstone Kingdom
18 -Mineralienatlas (Deutsch)
19 -QUT Mineral Atlas
20 -University of Colorado - Mineral Structure Data
21 - WWW-MINCRYST
22 -École des Mines de Paris
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Print or Cut-and-Paste your Fluorapatite Specimen Label here :
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Fluorapatite
Ca5(PO4)3F
Dana No: 41.8.1.1 Strunz No: VII/B.39-10
Locality:
Notes:
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