Apatite-(CaF) Mineral Data

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General Apatite-(CaF) Information

Chemical Formula:

Ca5(PO4)3F

Composition:

Molecular Weight = 504.30 gm

Calcium 39.74 % Ca 55.60 % CaO

Phosphorus 18.43 % P 42.22 % P₂O₅

Oxygen 38.07 % O

Fluorine 3.77 % F 3.77 % F

- % F -1.59 % -O=F₂

______ ______

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."

Name Pronunciation:

Apatite-(CaF)

Synonym:

Apatite

Fluorapatite - Renamed to Apatite-(CaF) by Mineralogical Record, v39 (2008), p 131

Wilkeite

Apatite-(CaF) Image

Images:

Click Here for Larger Apatite-(CaF) Image

Apatite-(CaF) 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

Images:

Apatite-(CaF) 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

Images:

Apatite-(CaF) Gatumbaite

Comments: White crystalline gatumbaite with yellow brazilianite in massive blue fluorapatite.
Location: Buranga Pegmatite, near Gatumba, Gisenyi, Rwanda. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Apatite-(CaF) Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.8(1), 2.702(0.6), 2.772(0.55),

Crystal Structure:

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Comodi P , Liu Y , Zanazzi P F , Montagnoli M , Physics and Chemistry of Minerals , 28 (2001) p.219-224, Structural and vibrational behaviour of fluorapatite with pressure., Part 1: in situ single-crystal X-ray diffraction investigation, Sample: P = 4.72 GPa

Physical Properties of Apatite-(CaF)

Cleavage:

{0001} Indistinct

Color:

Blue, Brown, Colorless, Violet, Green.

Density:

3.1 - 3.2, Average = 3.15

Diaphaneity:

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

Optical Properties of Apatite-(CaF)

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
Ncalc = 1.61 - 1.63

Optical Data:

Uniaxial (-), e=1.6325, w=1.63, bire=0.0025.

Calculated Properties of Apatite-(CaF)

Electron Density:

Bulk Density (Electron Density)=3.17 gm/cc
note: Specific Gravity of Apatite-(CaF) =3.20 gm/cc.

Fermion Index:

Fermion Index = 0.0007191776
Boson Index = 0.9992808224

Photoelectric:

PE_{Apatite-(CaF)}= 5.79 barns/electron
U=PE_{Apatite-(CaF)} x rElectron Density= 18.38 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Apatite-(CaF) is Not Radioactive

Apatite-(CaF) Classification

Dana Class:

41.08.01.01 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.08)where (A)5 (XO4)3 Zq

(41.08.01)Apatite Group

41.08.01.00 Apatite* Ca5(PO4)3(OH,F,Cl) P 6₃/m 6/m

41.08.01.01 Apatite-(CaF) Ca5(PO4)3F P 6₃/m 6/m

41.08.01.02 Apatite-(CaCl) Ca5(PO4)3Cl P 6₃/m 6/m

41.08.01.03 Apatite-(CaOH) Ca5(PO4)3(OH) P 6₃/m 6/m

41.08.01.04 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 6₃/m 6/m

41.08.01.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

41.08.01.06 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

41.08.01.06a Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

41.08.01.06b Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

41.08.01.07 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

41.08.01.08 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

41.08.01.09 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3

41.08.01.10 IMA2008-009! Sr5(PO4)3F P 6₃/m 6/m 2/m 2/m

41.08.01.11 IMA2008-068! Ca2Pb3(PO4)3F P 6₃/m 6/m

41.08.01.12 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 6₃/m 6/m

Strunz Class:

08.BN.05 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BN -With only large cations, (OH, etc.):RO4 = 0.33:1

08.BN.05 Alforsite Ba5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite* Ca5(PO4)3(OH,F,Cl) P 6₃/m 6/m

08.BN.05 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

08.BN.05 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

08.BN.05 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 6₃/m 6/m

08.BN.05 Deloneite-(Ce)! NaCa2SrCe(PO4)3F P 3 3

08.BN.05 Johnbaumite Ca5(AsO4)3(OH) P 6₃/m,P 6₃ Hex

08.BN.05 Apatite-(CaOH) Ca5(PO4)3(OH) P 6₃/m 6/m

08.BN.05 Apatite-(CaCl) Ca5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Carbonate-fluorapatite? Ca5(PO4,CO3)3F P 6₃/m 6/m

08.BN.05 Carbonate-hydroxylapatite? Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

08.BN.05 Clinomimetite Pb5(AsO4)3Cl P 2₁/b 2/m

08.BN.05 Apatite-(CaF) Ca5(PO4)3F P 6₃/m 6/m

08.BN.05 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

08.BN.05 Hedyphane Ca2Pb3(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Mimetite Pb5(AsO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(SrOH) (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

08.BN.05 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 6₃/m,P 6₃ Hex

08.BN.05 Pyromorphite Pb5(PO4)3Cl P 6₃/m 6/m

08.BN.05 Vanadinite Pb5(VO4)3Cl P 6₃/m 6/m

08.BN.05 Apatite-(CaOH)-M! (Ca,Na)5[(P,S)O4]3(OH,Cl) P 2₁/b 2/m

08.BN.05 IMA2008-068! Ca2Pb3(PO4)3F P 6₃/m 6/m

08.BN.05 Svabite Ca5(AsO4)3F P 6₃/m 6/m

08.BN.05 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

08.BN.05 Turneaureite Ca5[(As,P)O4]3Cl P 6₃/m 6/m

08.BN.05 Phosphohedyphane! Ca2Pb3(PO4)3Cl P 6₃/m 6/m

08.BN.05 IMA2008-009! Sr5(PO4)3F P 6₃/m 6/m 2/m 2/m

08.BN.05 Hydroxylpyromorphite! Pb5(PO4)3OH P 6₃/m 6/m

Other Apatite-(CaF) Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Apatite-(CaF) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - Google Images
4 - Google Scholar
5 - MinDAT
6 - MinMax(Deutsch)
7 - MinMax(English)
8 - Mineralienatlas (Deutsch)
9 - QUT Mineral Atlas
10 - Ruff.Info

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Apatite-(CaF)

Ca5(PO4)3F
Dana No: 41.08.01.01 Strunz No: 08.BN.05
Locality:

Notes: