Mineralogy Database

Fluocerite-(La) Mineral Data

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General Fluocerite-(La) Information

Help on Chemical  Formula: Chemical Formula: (La,Ce)F3
Help on Composition: Composition: Molecular Weight = 196.02 gm
   Lanthanum  63.78 %  La   74.79 % La2O3
   Cerium      7.15 %  Ce    8.37 % Ce2O3
   Fluorine   29.08 %  F    29.08 % F
                -   %   F   -12.24 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La0.9Ce0.1F3
Help on Environment: Environment: In hydrothermal quartz veins in granite.
Help on IMA Status: IMA Status: Approved IMA 1969
Help on Locality: Locality: Central Kazakhstan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its chemical composition containing fluorine (Latin, fluere = "to flow") and cerium (Named after the asteroid Ceres) with the modifier La-lanthanum (Greek, lanthanein = "to lie hidden").
Help on Name Pronunciation: Name Pronunciation: Fluocerite-(La) + Pronunciation Say FLUOCERITE-(LA)
Help on Synonym: Synonym: Fluocerite
  ICSD 3
  PDF 32-483
 

Fluocerite-(La) Crystallography

Help on Axial Ratios: Axial Ratios: a:c = 1:1.7642
Help on Cell Dimensions: Cell Dimensions: a = 4.135, c = 7.295, Z = 2; V = 108.02 Den(Calc)= 6.03
Help on Crystal System: Crystal System: Hexagonal Space Group: Unk
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.19(1), 1.048(0.7), 2.07(0.6),
Help on Forms: Forms:

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Help on Above

Forms: ( 0 3 2) ( 3 3 2) ( 1 1 0) ( 0 1 0) ( 0 0 1)

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Physical Properties of Fluocerite-(La)

Help on Cleavage: Cleavage: {???} Indistinct, {???} Imperfect
Help on Color: Color: Greenish yellow.
Help on Density: Density: 5.93
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Fluocerite-(La)

Help on Optical Data: Optical Data: Uniaxial (-), e=1.603, w=1.609, bire=0.0060.
 

Calculated Properties of Fluocerite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.17 gm/cc
note: Specific Gravity of Fluocerite-(La) =6.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0005739848
Boson Index = 0.9994260152
Help on Photoelectric: Photoelectric: PEFluocerite-(La) = 358.13 barns/electron
U=PEFluocerite-(La) x relectron=1,853.00 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 64,914.84 (Gamma Ray American Petroleum Institute Units)
Concentration of Fluocerite-(La) per GRapi unit = 15.40 (PPM)

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

Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 10 cm box) 468.56 ±117.14 grams of pure Fluocerite-(La) .

Estimated Radioactivity from Fluocerite-(La) - 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 / 6.82 cm 1,588,698 4.29E-05 64,914.84 21.34
100 gm / 3.16 cm 158,870 4.29E-06 6,491.48 2.13
10 gm / 1.47 cm 15,887 4.29E-07 649.15 0.21
1 gm / 6.82 mm 1,589 4.29E-08 64.91 0.02
0.1 gm / 3.16 mm 159 4.29E-09 6.49 0.00
0.01 gm / 1.47 mm 16 4.29E-10 0.65 0.00
0.001 gm / 0.68 mm 2 4.29E-11 0.06 0.00

Weight of pure Fluocerite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.03 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 ( 3.55 % Th) From Sum REE Elements (70.92 % REE)
 

Fluocerite-(La) Classification

Help on  Dana Class: Dana Class: 09.03.04.02 (09)Anhydrous and Hydrated Halides
  (09.03)Dana Type
  (09.03.04)Fluocerite Group
 
09.03.04.01 Fluocerite-(Ce) (Ce,La)F3 P 63/mcm 6/m 2/m 2/m
 
09.03.04.02 Fluocerite-(La) (La,Ce)F3 Unk Hex
Help on  Strunz Class: Strunz Class: 03.AC.15 03 - HALIDES
  03.A - Simple Halides, Without H2O
  03.AC -M:X = 1:3
 
03.AC.15 Fluocerite-(Ce) (Ce,La)F3 P 63/mcm 6/m 2/m 2/m
 
03.AC.15 Fluocerite-(La) (La,Ce)F3 Unk Hex
 

Other Fluocerite-(La) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Fluocerite-(La) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Fluocerite-(La) Specimen Label here :

Fluocerite-(La)

(La,Ce)F3
Dana No: 09.03.04.02 Strunz No: 03.AC.15
Locality:

 

Notes:

 

 
   
 


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