Fluorbritholite-(Ce) Mineral Data + Say FLUORBRITHOLITE-(CE)


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General Fluorbritholite-(Ce) Information
Help on Chemical Formula: Chemical Formula: (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F)
Help on Composition: Composition: Molecular Weight = 622.39 gm
   Sodium       2.22 %  Na    2.99 % Na2O
   Calcium     18.03 %  Ca   25.23 % CaO
   Lanthanum    8.93 %  La   10.47 % La2O3
   Cerium      20.26 %  Ce   23.73 % Ce2O3
   Silicon     12.18 %  Si   26.07 % SiO2
   Phosphorus   2.49 %  P     5.70 % P2O5
   Hydrogen     0.03 %  H     0.29 % H2O
   Oxygen      33.42 %  O
   Fluorine     2.44 %  F     2.44 % F
                 -   %  F    -1.03 % -O=F2
              ______        ______ 
              100.00 %       95.89 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca2.8Ce0.9La0.4Na0.6(SiO4)2.7(PO4)0.5F0.8(OH)0.2
Help on Environment: Environment: In vugs in nepheline syenite, marble zenoliths, sodalite syenite zenoliths and pegmatite dikes.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: For the relationship to Britholite-Ce the fluorine content.
Help on Synonym: Synonym: IMA1991-027
 

Fluorbritholite-(Ce) Image

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Fluorbritholite-(Ce)

Comments: Amorphous (metamict) grain of fluorbritholite-(Ce) on matrix.
Location: Norra Karr, Grena, Jonkoping, Sweden. Scale: Crystal size 1 cm.
© John Veevaert

Fluorbritholite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:0.73373
Help on Cell Dimensions: Cell Dimensions: a = 9.517, c = 6.983, Z = 2; V = 547.74 Den(Calc)= 3.77
Help on Crystal System: Crystal System: Hexagonal - DipyramidalH-M Symbol (6/m) Space Group: P 63/m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.845(1), 1.87(0.4), 2.822(0.4),
 

Physical Properties of Fluorbritholite-(Ce)

Help on Cleavage: Cleavage: [001] Distinct
Help on Color: Color: Yellow, Tan, Colorless, Reddish brown.
Help on Density: Density: 4.66
Help on Diaphaniety: Diaphaniety: Opaque to translucent
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Adamantine
Help on Streak: Streak: pale brown
 

Optical Properties of Fluorbritholite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.195 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2093,KPDmeas= 0.1693,KC= 0.1751
Help on Optical Data: Optical Data: Uniaxial (-), e=1.786, w=1.792, bire=0.0060.
 

Calculated Properties of Fluorbritholite-(Ce)

Help on Electron Density: Electron Density:

relectron=4.41 gm/cc
note: rFluorbritholite-(Ce) =4.66 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00617
Boson Index = 0.99383
Help on Photoelectric: Photoelectric:

PEFluorbritholite-(Ce) = 142.51 barns/electron
U=PEFluorbritholite-(Ce) x relectron= 628.02 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 29,444.14 (Gamma Ray American Petroleum Institute Units)

Fluorbritholite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Fluorbritholite-(Ce) - 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 / 7.43 cm 653,822 1.77E-05 29,444.14 9.68
100 gm / 3.45 cm 65,382 1.77E-06 2,944.41 0.97
10 gm / 1.60 cm 6,538 1.77E-07 294.44 0.10
1 gm / 7.43 mm 654 1.77E-08 29.44 0.01
0.1 gm / 3.45 mm 65 1.77E-09 2.94 0.00
0.01 gm / 1.60 mm 7 1.77E-10 0.29 0.00
0.001 gm / 0.74 mm 1 1.77E-11 0.03 0.00

Weight of pure Fluorbritholite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.66 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 ( 1.46 % Th) From Sum REE Elements (29.19 % REE)
 

Fluorbritholite-(Ce) Classification
Help on Dana Class: Dana Class: 52.4.9.8 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.4)with cations in [6] and/or > [6] coordination
  (52.4.9)Silicate apatites
 
52.4.9.0 Ellestadite* Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
52.4.9.1 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.4.9.2 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
52.4.9.3 Fluorellestadite Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
52.4.9.4 Hydroxylellestadite Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m
 
52.4.9.5 Chlorellestadite Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m
 
52.4.9.6 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63/m 6/m
 
52.4.9.7 Karnasurtite-(Ce) (Ce,La,Th)(Ti,Nb)(Al,Fe)(Si,P)2O7(OH)4·3(H2O)(?) Unk. Hex
 
52.4.9.8 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m
Help on Strunz Class: Strunz Class: VIII/B.27-62 VIII - Silicates
  VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, with groups [SO4]2-, [CrO4]2- and [PO4]3-
  VIII/B.27 - Fluorellestadite - Lessingite-(Ce) series
 
VIII/B.27-10 Fluorellestadite Ca5(SiO4,PO4,SO4)3(F,OH,Cl) P 63/m 6/m
 
VIII/B.27-20 Chlorellestadite Ca5(SiO4,PO4,SO4)3(Cl,OH,F) P 63/m 6/m
 
VIII/B.27-30 Hydroxylellestadite Ca5(SiO4,SO4)3(OH,Cl,F) P 63/m 6/m
 
VIII/B.27-40 Mattheddleite Pb20(SiO4)7(SO4)4Cl4 P 63/m 6/m
 
VIII/B.27-50 Britholite-(Y) (Y,Ca)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
VIII/B.27-60 Britholite-(Ce) (Ce,Ca,Th,La,Nd)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 
VIII/B.27-62 Fluorbritholite-(Ce) (Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F) P 63/m 6/m
 

Other Fluorbritholite-(Ce) Information
Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,p1013,1996) OPTIC PROP.(MinRec)
Help on See Also: See Also: Links to other databases for Fluorbritholite-(Ce) :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Fluorbritholite-(Ce)

(Ca,Ce,La,Na)5(SiO4,PO4)3(OH,F)
Dana No: 52.4.9.8 Strunz No: VIII/B.27-62
Locality:

 

Notes:

 
 
   
 
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