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Fluorcalciobritholite Mineral Data

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General Fluorcalciobritholite Information

Help on Chemical  Formula: Chemical Formula: (Ca,REE)5[(Si,P)O4]3F
Help on Composition: Composition: Molecular Weight = 710.23 gm
   Strontium       0.25 %  Sr    0.29 % SrO
   Calcium        15.80 %  Ca   22.11 % CaO
   Lanthanum      10.56 %  La   12.39 % La2O3
   Cerium         18.35 %  Ce   21.49 % Ce2O3
   Praeseodymium   1.59 %  Pr    1.86 % Pr2O3
   Samarium        0.64 %  Sm    0.74 % Sm2O3
   Gadolinium      0.66 %  Gd    0.77 % Gd2O3
   Dysprosium      0.46 %  Dy    0.53 % Dy2O3
   Yttrium         2.25 %  Y     2.86 % Y2O3
   Erbium          0.24 %  Er    0.27 % Er2O3
   Thorium         1.31 %  Th    1.49 % ThO2
   Ytterbium       0.49 %  Yb    0.55 % Yb2O3
   Manganese       0.23 %  Mn    0.30 % MnO
   Silicon         7.67 %  Si   16.41 % SiO2
   Phosphorus      4.62 %  P    10.59 % P2O5
   Neodymium       5.28 %  Nd    6.16 % Nd2O3
   Chlorine        0.05 %  Cl    0.05 % Cl
                    -   %   Cl   -0.01 % -O=Cl2   
   Oxygen         27.53 %  O
   Fluorine        2.03 %  F     2.03 % F
                    -   %   F    -0.86 % -O=F2    
                 ______        ______ 
                 100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2.8Ce0.93La0.54Nd0.26Y0.18Pr0.08Sm0.03Gd0.03Dy0.02Yb0.02Er0.01Th0.04Mn2+0.03Sr0.02 Si1.94P1.06O12F0.76O0.22Cl0.01
Help on Environment: Environment: Analog of fluorbritholite-(Ce).
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Mountain Kukisvumchorr, Khibiny massif, Kola peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition and membership in the britholite group.
Help on Synonym: Synonym: IMA2006-010
 

Fluorcalciobritholite Image

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  Fluorcalciobritholite

Comments: Reddish black fluorcalciobritholite grain from the type locality. Part of the holotype specimen.
Location: Tuliok River head, East slope, Kukisvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Grain Size 0.8 mm.
© Pavel M. Kartashov

Fluorcalciobritholite Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:0.72912
Help on Cell Dimensions: Cell Dimensions: a = 9.58, c = 6.985, Z = 2; V = 555.17 Den(Calc)= 4.25
Help on Crystal System: 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/Io): 2.85(1), 3.15(0.7), 2.78(0.6),3.51(0.45), 1.122(0.3), 1.236(0.25), 1.931(0.25), 1.965(0.25),
 

Physical Properties of Fluorcalciobritholite

Help on Color: Color: Pale pinkish brown, Brown.
Help on Density: Density: 4.2
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Hexagonal - Six-sided crystal shape in cross-section or habit.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5.5 - Knife Blade
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Fluorcalciobritholite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.004 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1724,KPDmeas= 0.1744,KC= 0.1731
Ncalc = 1.73 - 1.74
Help on Optical Data: Optical Data: Uniaxial (-), e=1.73, w=1.735, bire=0.0050.
 

Calculated Properties of Fluorcalciobritholite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.93 gm/cc
note: Specific Gravity of Fluorcalciobritholite =4.25 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEFluorcalciobritholite = 233.83 barns/electron
U=PEFluorcalciobritholite x relectron= 918.42 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 25,800.01 (Gamma Ray American Petroleum Institute Units)
Concentration of Fluorcalciobritholite per GRapi unit = 38.76 (PPM)

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

Estimated Radioactivity from Fluorcalciobritholite - 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 / 7.66 cm 586,268 1.58E-05 25,800.01 8.48
100 gm / 3.56 cm 58,627 1.58E-06 2,580.00 0.85
10 gm / 1.65 cm 5,863 1.58E-07 258.00 0.08
1 gm / 7.66 mm 586 1.58E-08 25.80 0.01
0.1 gm / 3.56 mm 59 1.58E-09 2.58 0.00
0.01 gm / 1.65 mm 6 1.58E-10 0.26 0.00
0.001 gm / 0.77 mm 1 1.58E-11 0.03 0.00

Weight of pure Fluorcalciobritholite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.25 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
 

Fluorcalciobritholite Classification

Help on  Dana Class: Dana Class: 52.04.09.09 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.09)Silicate apatites
 
52.04.09.00 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
52.04.09.01 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.04.09.02 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.04.09.03 Ellestadite-(F) Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
52.04.09.04 Ellestadite-(OH) Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m
 
52.04.09.05 Ellestadite-(Cl) Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m
 
52.04.09.06 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63/m 6/m
 
52.04.09.07 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4•3(H2O)(?) Unk. Hex
 
52.04.09.08 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.04.09.09 Fluorcalciobritholite! (Ca,REE)5[(Si,P)O4]3F P 63/m 6/m
Help on  Strunz Class: Strunz Class: 09.AH.25 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AH -Nesosilicates with CO3, SO4, PO4, etc.
 
09.AH.25 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
09.AH.25 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
09.AH.25 Ellestadite-(Cl) Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m
 
09.AH.25 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
09.AH.25 Ellestadite-(F) Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
09.AH.25 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
09.AH.25 Ellestadite-(OH) Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m
 
09.AH.25 Fluorcalciobritholite! (Ca,REE)5[(Si,P)O4]3F P 63/m 6/m
 

Other Fluorcalciobritholite Information

Help on References: References: NAME( AmMin, v93:252) PHYS. PROP.(AmMin, v93:252) OPTIC PROP.(AmMin, v93:252)
Help on See Also: See Also: Links to other databases for Fluorcalciobritholite :
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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Print or Cut-and-Paste your Fluorcalciobritholite Specimen Label here :

Fluorcalciobritholite

(Ca,REE)5[(Si,P)O4]3F
Dana No: 52.04.09.09 Strunz No: 09.AH.25
Locality:

 

Notes:

 

 
   
 


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