Bastnasite-(Ce) Mineral Data

Bastnasite-(Ce) Mineral Data
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General Bastnasite-(Ce) Information

Help on Chemical Formula: Chemical Formula: Ce(CO3)F
Help on Composition: Composition: Molecular Weight = 219.12 gm
   Cerium    63.94 %  Ce   74.90 % Ce2O3
   Carbon     5.48 %  C    20.08 % CO2
   Oxygen    21.90 %  O
   Fluorine   8.67 %  F     8.67 % F
               -   %   F    -3.65 % -O=F2    
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce(CO3)F
Help on Environment: Environment: Contact or alteration zones in alkalic rocks.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1841
Help on Locality: Locality: Bastnas Mine, Riddarhyttan district, Vastermanland, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality.
Help on Name Pronunciation: Name Pronunciation: Bastnasite-(Ce) + Pronunciation Say BASTNASITE-(CE)
Help on Synonym: Synonym: Hamartite
 

Bastnasite-(Ce) Image

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Bastnasite-(Ce)

Comments: Platy crystal of bastnäsite-(Ce).
Location: Trimouns, Luzenac, Aričge, France. Scale: 0.8 cm.
© John Veevaert

Bastnasite-(Ce) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.36731
Help on Cell Dimensions: Cell Dimensions: a = 7.16, c = 9.79, Z = 6; V = 434.65 Den(Calc)= 5.02
Help on Crystal System: Crystal System: Hexagonal - Ditrigonal DipyramidalH-M Symbol (6 m2) Space Group: P 62c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.879(1), 3.564(0.7), 4.88(0.4),
Click Here for Large Bastnasite-(Ce) Structure Window Crystal Structure:

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Donnay G , Donnay J D H , American Mineralogist , 38 (1953) p.932-963, The crystallography of bastnaesite, parasite, roentgenite, and synchisite

 

Physical Properties of Bastnasite-(Ce)

Help on Cleavage: Cleavage: {1011} Imperfect, {0001} Indistinct
Help on Color: Color: Yellow, Reddish brown.
Help on Density: Density: 4.95 - 5, Average = 4.97
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Massive - Granular - Common texture observed in granite and other igneous rock.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 4-5 - Fluorite-Apatite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Bastnasite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.009 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1529,KPDmeas= 0.1543,KC= 0.1543
Ncalc = 1.76 - 1.77
Help on Optical Data: Optical Data: Uniaxial (+), w=1.717, e=1.818, bire=0.1010.
 

Calculated Properties of Bastnasite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Bastnasite-(Ce) =4.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0007080974
Boson Index = 0.9992919026
Help on Photoelectric: Photoelectric: PEBastnasite-(Ce) = 333.56 barns/electron
U=PEBastnasite-(Ce) x relectron=1,469.21 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 60,386.63 (Gamma Ray American Petroleum Institute Units)
Concentration of Bastnasite-(Ce) per GRapi unit = 16.56 (PPM)

Bastnasite-(Ce) 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) 503.70 ±125.92 grams of pure Bastnasite-(Ce) .

Estimated Radioactivity from Bastnasite-(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 / 7.27 cm 1,432,338 3.87E-05 60,386.63 19.85
100 gm / 3.37 cm 143,234 3.87E-06 6,038.66 1.99
10 gm / 1.57 cm 14,323 3.87E-07 603.87 0.20
1 gm / 7.27 mm 1,432 3.87E-08 60.39 0.02
0.1 gm / 3.37 mm 143 3.87E-09 6.04 0.00
0.01 gm / 1.57 mm 14 3.87E-10 0.60 0.00
0.001 gm / 0.73 mm 1 3.87E-11 0.06 0.00

Weight of pure Bastnasite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.98 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 ( 3.20 % Th) From Sum REE Elements (63.94 % REE)
 

Bastnasite-(Ce) Classification
Help on Dana Class: Dana Class: 16a.01.01.01 (16a)Carbonates - Hydroxyl or Halogen
  (16a.01)in the Bastnasite/Shynchysite/Parasite Groups
  (16a.01.01)Bastnasite Subgroup
 
16a.01.01.01 Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2
 
16a.01.01.02 Bastnasite-(La) La(CO3)F P 62c 6 m2
 
16a.01.01.03 Bastnasite-(Y) Y(CO3)F P 62c 6 m2
Help on Strunz Class: Strunz Class: 05.BD.20a 05 - CARBONATES (NITRATES)
  05.B - Carbonates with additional anions, without H2O
  05.BD -With rare-earth elements (REE)
 
05.BD.20a Bastnasite-(Ce) Ce(CO3)F P 62c 6 m2
 
05.BD.20a Bastnasite-(La) La(CO3)F P 62c 6 m2
 
05.BD.20a Bastnasite-(Y) Y(CO3)F P 62c 6 m2
 
05.BD.20a Hydroxylbastnasite-(Ce) Ce(CO3)(OH) P 62c 6 m2
 
05.BD.20a Hydroxylbastnasite-(La) La(CO3)(OH) C 2221 2 2 2
 
05.BD.20a Hydroxylbastnasite-(Nd) Nd(CO3)(OH) P 62c 6 m2
 
05.BD.20a Thorbastnasite Th(Ca,Ce)(CO3)2F2•3(H2O) P 62c 6 m2
 

Other Bastnasite-(Ce) Information
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Bastnasite-(Ce) :
1 - Alkali-Nuts(English)
2 - Am. Min. Crystal Structure Database
3 - Athena
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
13 - Scandinavian mineral gallery
14 - WWW-MINCRYST

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Print or Cut-and-Paste your Bastnasite-(Ce) Specimen Label here :

Bastnasite-(Ce)

Ce(CO3)F
Dana No: 16a.01.01.01 Strunz No: 05.BD.20a
Locality:

 

Notes: