Apatite-(CaOH) Mineral Data

General Apatite-(CaOH) Information

Chemical Formula:

Ca5(PO4)3(OH)

Composition:

Molecular Weight = 502.31 gm

Calcium 39.89 % Ca 55.82 % CaO

Phosphorus 18.50 % P 42.39 % P₂O₅

Hydrogen 0.20 % H 1.79 % H₂O

Oxygen 41.41 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₅(PO₄)₃(OH)

IMA Status:

Valid Species (Pre-IMA) 1856

Locality:

Holly Springs, Cherokee County, Georgia, USA. Link to MinDat.org Location Data.

Name Origin:

Named as the hydroxyl end-member and from the Greek apatao - "I am misleading."

Name Pronunciation:

Apatite-(CaOH)

Synonym:

Apatite

Deltaite - mixture with crandellite

Hydroxyapatite - Renamed to Apatite-(CaOH) by Mineralogical Record, v39 (2008), p 131

Apatite-(CaOH) Image

Images:

Apatite-(CaOH)

Comments: Opaque white blocky crystal of hydroxylapatite.
Location: Snarum, Buskerud, Norway. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Apatite-(CaOH) Crystallography

Axial Ratios:

a:c = 1:0.72998

Cell Dimensions:

a = 9.418, c = 6.875, Z = 2; V = 528.11 Den(Calc)= 3.16

Crystal System:

Hexagonal - Dipyramidal H-M Symbol (6/m) Space Group: P 6₃/m

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

By Intensity(I/I_o): 2.814(1), 2.72(0.6), 2.778(0.6),

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Forms: ( 0 1 1) ( 0 1 0) ( 0 0 1)

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Physical Properties of Apatite-(CaOH)

Cleavage:

{???} Indistinct

Color:

Colorless, White, Gray, Yellow, Yellowish green.

Density:

3.08

Diaphaneity:

Transparent to Opaque

Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Hardness:

5 - Apatite

Luster:

Vitreous - Dull

Streak:

white

Optical Properties of Apatite-(CaOH)

Gladstone-Dale:

CI meas= -0.046 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.02 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2049,KPDmeas= 0.2102,KC= 0.2009
Ncalc = 1.62 - 1.63

Optical Data:

Uniaxial (-), e=1.644, w=1.651, bire=0.0070.

Calculated Properties of Apatite-(CaOH)

Electron Density:

Bulk Density (Electron Density)=3.15 gm/cc
note: Specific Gravity of Apatite-(CaOH) =3.16 gm/cc.

Fermion Index:

Fermion Index = 0.000737618
Boson Index = 0.999262382

Photoelectric:

PE_{Apatite-(CaOH)}= 5.78 barns/electron
U=PE_{Apatite-(CaOH)} x rElectron Density= 18.19 barns/cc.

Radioactivity:

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

Apatite-(CaOH) Classification

Dana Class:

41.08.01.03 (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-(CaOH) Information

References:

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

See Also:

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

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Apatite-(CaOH)

Ca5(PO4)3(OH)
Dana No: 41.08.01.03 Strunz No: 08.BN.05
Locality:

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