Strontium-apatite Mineral Data

Strontium-apatite Mineral Data +

General Strontium-apatite Information

Chemical Formula:

(Sr,Ca)5(PO4)3(F,OH)

Composition:

Molecular Weight = 634.05 gm

Strontium 38.00 % Sr 44.94 % SrO

Calcium 14.22 % Ca 19.90 % CaO

Phosphorus 14.66 % P 33.58 % P₂O₅

Hydrogen 0.08 % H 0.71 % H₂O

Oxygen 31.54 % O

Fluorine 1.50 % F 1.50 % F

- % F -0.63 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

5(Sr_0.55)5(Ca_0.45)(PO₄)₃F_0.5(OH)_0.5

Environment:

Alkali pegmatites.

IMA Status:

Approved IMA 1962

Locality:

Inaglinsky massif, southern Yakutia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for the composition and resemblance to the apatites.

Synonym:

Apatite

ICSD 20705

PDF 33-1348

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Strontium-apatite Crystallography

Axial Ratios:

a:c = 1:0.74385

Cell Dimensions:

a = 9.565, c = 7.115, Z = 2; V = 563.74 Den(Calc)= 3.74

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): 2.89(1), 2.78(0.7), 3.167(0.7),

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Forms: [ 2 0 1] [ 1 1 1] [ 0 1 0] [ 0 0 1]

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Physical Properties of Strontium-apatite

Cleavage:

[1011] Imperfect

Color:

Green, Yellowish green, Colorless.

Density:

3.84

Diaphaniety:

Transparent to Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Skeletal - Crystals form crude outlines with missing faces.

Habit:

Sugary - Granular texture formed from small, anhedral to subhedral grains forming massive rock. (Aplitic texture).

Hardness:

5 - Apatite

Luster:

Vitreous - Greasy

Optical Properties of Strontium-apatite

Gladstone-Dale:

CI meas= 0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1722,KPDmeas= 0.1677,KC= 0.1715

Optical Data:

Uniaxial (-), e=1.637, w=1.651, bire=0.0140.

Calculated Properties of Strontium-apatite

Electron Density:

r_electron=3.53 gm/cc
note: r_{Strontium-apatite}=3.74 gm/cc.

Fermion Index

Fermion Index = 0.02694
Boson Index = 0.97306

Photoelectric:

PE_{Strontium-apatite}= 45.07 barns/electron
U=PE_{Strontium-apatite} x r_electron= 159.23 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Strontium-apatite is Not Radioactive

Strontium-apatite Classification

Dana Class:

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

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

(41.8.1)Dana Group

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

41.8.1.1 Fluorapatite Ca5(PO4)3F P 6₃/m 6/m

41.8.1.2 Chlorapatite Ca5(PO4)3Cl P 6₃/m 6/m

41.8.1.3 Hydroxylapatite Ca5(PO4)3(OH) P 6₃/m 6/m

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

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

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

41.8.1.6a Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

41.8.1.6b Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

41.8.1.7 Strontium-apatite (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

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

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

Strunz Class:

VII/B.39-100 VII - Phosphates, Arsenates and Vanadates

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

VII/B.39 - Apatite - Pyromorphite group

VII/B.39-10 Fluorapatite Ca5(PO4)3F P 6₃/m 6/m

VII/B.39-20 Chlorapatite Ca5(PO4)3Cl P 6₃/m 6/m

VII/B.39-30 Hydroxylapatite Ca5(PO4)3(OH) P 6₃/m 6/m

VII/B.39-40 Carbonate-hydroxylapatite Ca5(PO4,CO3)3(OH) P 6₃/m 6/m

VII/B.39-50 Carbonate-fluorapatite Ca5(PO4,CO3)3F P 6₃/m 6/m

VII/B.39-60 Svabite Ca5(AsO4)3F P 6₃/m 6/m

VII/B.39-70 Turneaureite Ca5[(As,P)O4]3Cl P 6₃/m 6/m

VII/B.39-80 Johnbaumite Ca5(AsO4)3(OH) P 6₃/m,P 6₃ Hex

VII/B.39-90 Fermorite (Ca,Sr)5(AsO4,PO4)3(OH) P 6₃/m 6/m

VII/B.39-95 Fluorcaphite! (Ca,Sr,Ce,Na)5(PO4)3F P 6₃ 6

VII/B.39-100 Strontium-apatite (Sr,Ca)5(PO4)3(F,OH) P 6₃/m 6/m

VII/B.39-110 Belovite-(Ce) (Sr,Ce,Na,Ca)5(PO4)3(OH) P 3 3

VII/B.39-115 Belovite-(La)! (Sr,La,Ce,Ca)5(PO4)3(F,OH) P 3 3

VII/B.39-117 Kuannersuite-(Ce)! Ba6Na2REE2(PO4)6FCl P 3 3

VII/B.39-120 Alforsite Ba5(PO4)3Cl P 6₃/m 6/m

VII/B.39-130 Morelandite (Ba,Ca,Pb)5(AsO4,PO4)3Cl P 6₃/m,P 6₃ Hex

VII/B.39-140 Hedyphane Ca2Pb3(AsO4)3Cl P 6₃/m 6/m

VII/B.39-150 Pyromorphite Pb5(PO4)3Cl P 6₃/m 6/m

VII/B.39-160 Mimetite Pb5(AsO4)3Cl P 6₃/m 6/m

VII/B.39-165 Clinomimetite Pb5(AsO4)3Cl P 2₁/b 2/m

VII/B.39-170 Vanadinite Pb5(VO4)3Cl P 6₃/m 6/m

Other Strontium-apatite Information

References:

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

See Also:

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

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Strontium-apatite

(Sr,Ca)5(PO4)3(F,OH)
Dana No: 41.8.1.7 Strunz No: VII/B.39-100
Locality:

Notes: