Yttrocerite Mineral Data

General Yttrocerite Information

Help on Chemical  Formula: Chemical Formula: CaF2 + (Y,Ce)F3
Help on Composition: Composition: Molecular Weight = 236.78 gm
   Calcium   16.93 %  Ca   23.68 % CaO
   Cerium    14.79 %  Ce   17.33 % Ce2O3
   Yttrium   28.16 %  Y    35.76 % Y2O3
   Fluorine  40.12 %  F    40.12 % F
               -   %  F   -16.89 % -O=F2
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaY0.75Ce0.25F5
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Falun, Sweden, Sussex Co., New Jersey. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from its chemical composition containing ytterbium (Named after Ytterby, Sweden) and cerium (Named after the asteroid, Ceres)..
 

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Yttrocerite Crystallography

Help on Crystal System: Crystal System: IsometricSpace Group: Unk
 

Physical Properties of Yttrocerite

Help on Cleavage: Cleavage: [111] Perfect, [111] Perfect, [111] Perfect
Help on Color: Color: Reddish blue, Purplish gray, Brown.
Help on Density: Density: 3 - 4, Average = 3.5
Help on Diaphaniety: Diaphaniety: Translucent
Help on Fracture: Fracture: Irregular - Flat surfaces (not cleavage) fractured in an irregular pattern.
Help on Habit: Habit: Earthy - Dull, clay-like texture with no visible crystalline affinities, (e.g. howlite).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous (Glassy)
Help on Magnetism: Magnetism: Nonmagnetic
Help on Streak: Streak: white
 

Optical Properties of Yttrocerite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.204 (Poor) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1229,KC= 0.1543
Help on Optical Data: Optical Data: Isotropic, n=1.43.
 

Calculated Properties of Yttrocerite

Help on Electron Density: Electron Density:

relectron=3.22 gm/cc
note: rYttrocerite =3.50 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00022
Boson Index = 0.99978
Help on Photoelectric: Photoelectric:

PEYttrocerite = 112.77 barns/electron
U=PEYttrocerite x relectron= 362.57 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 14,495.39 (Gamma Ray American Petroleum Institute Units)

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

Estimated Radioactivity from Yttrocerite - 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 / 8.17 cm 331,384 8.96E-06 14,495.39 4.77
100 gm / 3.79 cm 33,138 8.96E-07 1,449.54 0.48
10 gm / 1.76 cm 3,314 8.96E-08 144.95 0.05
1 gm / 8.17 mm 331 8.96E-09 14.50 0.00
0.1 gm / 3.79 mm 33 8.96E-10 1.45 0.00
0.01 gm / 1.76 mm 3 8.96E-11 0.14 0.00
0.001 gm / 0.82 mm 0 8.96E-12 0.01 0.00

Weight of pure Yttrocerite in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.50 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 ( 0.74 % Th) From Sum REE Elements (14.79 % REE)
 

Yttrocerite Classification

Help on  Dana Class: Dana Class: 9.0.0.0 (9)Halide Minerals
  (9.0)Without Dana Classification Numbers
  (Fluoride, Anhydrous)
Help on  Strunz Class: Strunz Class: III/X.00-00 III - Halogenides
  III/X - Unclassified Strunz Halogenides
  III/X.00 - Fluoride, Anhydrous
 

Other Yttrocerite Information

Help on References: References: NAME( Emsley91) PHYS. PROP.(Dana) OPTIC PROP.(Dana)
Help on See Also: See Also: Links to other databases for Yttrocerite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 - Mineral and Gemstone Kingdom 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas

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Print or Cut-and-Paste your Yttrocerite Specimen Label here :

Yttrocerite

CaF2 + (Y,Ce)F3
Dana No: Unknown Strunz No: III/X.00-00
Locality:

 

Notes:

 

 
   
 
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