Fluorcaphite Mineral Data

Fluorcaphite Mineral Data +

General Fluorcaphite Information

Chemical Formula:

(Ca,Sr,Ce,Na)5(PO4)3F

Composition:

Molecular Weight = 671.38 gm

Sodium 0.86 % Na 1.15 % Na₂O

Strontium 19.58 % Sr 23.15 % SrO

Calcium 13.43 % Ca 18.79 % CaO

Cerium 20.87 % Ce 24.44 % Ce₂O₃

Phosphorus 13.84 % P 31.71 % P₂O₅

Oxygen 28.60 % O

Fluorine 2.83 % F 2.83 % F

- % F -1.19 % -O=F₂

______ ______

100.00 % 100.89 % = TOTAL OXIDE

Empirical Formula:

5(Ca_0.45)5(Sr_0.3)5(Ce_0.2)5(Na_0.05)(PO₄)₃F

Environment:

In miarolitic cavities in a hyperagpaitic pegmatite in ijolite-urtite. Ca and F dominant analog of strontium-apatite.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Khibina alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named after its composition of fluorine, calcium, and phosphorous.

Synonym:

ICSD 76619

IMA1996-022

PDF 50-1603

Fluorcaphite Image

Images:

Fluorcaphite

Comments: Massive, coarsely crystalline, pale yellowish fluorcaphite.
Location: Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture size 5 mm.
© Thomas Witzke / Abraxas-Verlag

Fluorcaphite Crystallography

Axial Ratios:

a:c = 1:0.73801

Cell Dimensions:

a = 9.485, c = 7.0001, Z = 2; V = 545.39 Den(Calc)= 4.09

Crystal System:

Hexagonal - PyramidalH-M Symbol (6) Space Group: P 6₃

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

By Intensity(I/I_o): 2.838(1), 2.74(0.53), 2.814(0.48),

Crystal Structure:

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Chakhmouradian A R , Hughes J M , Rakovan J F , The Canadian Mineralogist , 43 (2005) p.735-746, Fluorcaphite, a second occurrence and detailed structural analysis:, Simultaneous accommodation of Ca, Sr, Na, LREE in the apatite atomic arrangement, Sample: Mt. Selsurt, Lovozero, Russia

View Additional jPOWD Structure files for Fluorcaphite
[1]

Physical Properties of Fluorcaphite

Cleavage:

None

Color:

Light yellow, Bright yellow.

Density:

3.6

Diaphaniety:

Transparent

Fracture:

Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Fluorcaphite

Gladstone-Dale:

CI meas= -0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.074 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1572,KPDmeas= 0.1786,KC= 0.1698

Optical Data:

Uniaxial (-), e=1.637, w=1.649, bire=0.0120.

Calculated Properties of Fluorcaphite

Electron Density:

r_electron=3.35 gm/cc
note: r_Fluorcaphite=3.60 gm/cc.

Fermion Index

Fermion Index = 0.01402
Boson Index = 0.98598

Photoelectric:

PE_Fluorcaphite= 128.09 barns/electron
U=PE_Fluorcaphite x r_electron= 429.62 barns/cc.

Radioactivity:

GRapi = 20,739.73 (Gamma Ray American Petroleum Institute Units)

Fluorcaphite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Fluorcaphite** - weak
Specimen Size Weight/Volume (Sphere) *	Calculated Activity Bequerols (Bq)	Calculated Activity Curies (Ci)	Estimated Activity GR(api)	Estimated Exposure (mRem**)/hr If Held in Hand For One Hour
1000 gm / 8.10 cm	467,481	1.26E-05	20,739.73	6.82
100 gm / 3.76 cm	46,748	1.26E-06	2,073.97	0.68
10 gm / 1.74 cm	4,675	1.26E-07	207.40	0.07
1 gm / 8.10 mm	467	1.26E-08	20.74	0.01
0.1 gm / 3.76 mm	47	1.26E-09	2.07	0.00
0.01 gm / 1.74 mm	5	1.26E-10	0.21	0.00
0.001 gm / 0.81 mm	0	1.26E-11	0.02	0.00

Weight of pure Fluorcaphite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.60 gm/cc.*
Goverment Estimate of Average Annual Exposure ( 360 mRem) **
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Estimated Thorium Activity ( 1.04 % Th) From Sum REE Elements (20.87 % REE)

Fluorcaphite Classification

Dana Class:

41.8.1.8 (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.39-95 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 Fluorcaphite Information

References:

NAME( AmMin) PHYS. PROP.(Min.Mag.,Vol.61,p733,1997) OPTIC PROP.(AmMin)

See Also:

Links to other databases for Fluorcaphite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 - Mineral and Gemstone Kingdom 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Fluorcaphite

(Ca,Sr,Ce,Na)5(PO4)3F
Dana No: 41.8.1.8 Strunz No: VII/B.39-95
Locality:

Notes: