Bastnasite-(La) Mineral Data

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

Help on Chemical Formula: Chemical Formula: La(CO3)F
Help on Composition: Composition: Molecular Weight = 217.91 gm
   Lanthanum  63.74 %  La   74.76 % La2O3
   Carbon      5.51 %  C    20.20 % CO2
   Oxygen     22.03 %  O
   Fluorine    8.72 %  F     8.72 % F
                -   %   F    -3.67 % -O=F2    
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La(CO3)F
Help on IMA Status: IMA Status: Approved IMA 1966
Help on Locality: Locality: Gallinas Mountains, New Mexico, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its locality Bastnas Mine, Riddarhyttan, Vastmanland, Sweden.
Help on Name Pronunciation: Name Pronunciation: Bastnasite-(La) + Pronunciation Say BASTNASITE-(LA)
Help on Synonym: Synonym: Hamartite
 

Bastnasite-(La) Image

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Bastnasite-(La)

Comments: Orange, hexagonal crystal of bastnÃĪsite-(La).
Location: Red Cloud mines, Gallinas Mountains, Lincoln County, New Mexico, USA. Scale: Size Not Given.
© Lou Perloff / Photo Atlas of Minerals

Bastnasite-(La) Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.37145
Help on Cell Dimensions: Cell Dimensions: a = 7.118, c = 9.762, Z = 6; V = 428.34 Den(Calc)= 5.07
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): 2.88(1), 3.56(0.7), 4.88(0.4),
Click Here for Large Bastnasite-(La) Structure Window Crystal Structure:

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Oftedal I , Zeitschrift fur Kristallographie , 78 (1931) p.462-469, Zur kristallstruktur von bastnasit (Ce,La--)FCO3, Locality: Western Cheyenne Canyon, Colorado, USA, Note: positions of C and at least one O undetermined

 

Physical Properties of Bastnasite-(La)

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 Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: white
 

Optical Properties of Bastnasite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.02 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.038 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1514,KPDmeas= 0.1543,KC= 0.1574
Ncalc = 1.78 - 1.8
Help on Optical Data: Optical Data: Uniaxial (+), w=1.717, e=1.818, bire=0.1010.
 

Calculated Properties of Bastnasite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.38 gm/cc
note: Specific Gravity of Bastnasite-(La) =4.98 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0012857193
Boson Index = 0.9987142807
Help on Photoelectric: Photoelectric: PEBastnasite-(La) = 311.14 barns/electron
U=PEBastnasite-(La) x relectron=1,363.84 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 59,907.71 (Gamma Ray American Petroleum Institute Units)
Concentration of Bastnasite-(La) per GRapi unit = 16.69 (PPM)

Bastnasite-(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) 507.73 ±126.93 grams of pure Bastnasite-(La) .

Estimated Radioactivity from Bastnasite-(La) - weak
Specimen
Size
Weight/Volume
(Sphere) *		 Calculated
Activity
Becquerels
(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 1,427,855 3.86E-05 59,907.71 19.70
100 gm / 3.37 cm 142,786 3.86E-06 5,990.77 1.97
10 gm / 1.57 cm 14,279 3.86E-07 599.08 0.20
1 gm / 7.27 mm 1,428 3.86E-08 59.91 0.02
0.1 gm / 3.37 mm 143 3.86E-09 5.99 0.00
0.01 gm / 1.57 mm 14 3.86E-10 0.60 0.00
0.001 gm / 0.73 mm 1 3.86E-11 0.06 0.00

Weight of pure Bastnasite-(La) 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 ( 3.19 % Th) From Sum REE Elements (63.74 % REE)
 

Bastnasite-(La) Classification
Help on Dana Class: Dana Class: 16a.01.01.02 (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-(La) Information
Help on References: References: NAME( Ford32) PHYS. PROP.(Bull.Miner.,Vol.107-111,1984-1988) OPTIC PROP.(Ford32)
Help on See Also: See Also: Links to other databases for Bastnasite-(La) :
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 Bastnasite-(La) Specimen Label here :

Bastnasite-(La)

La(CO3)F
Dana No: 16a.01.01.02 Strunz No: 05.BD.20a
Locality:

 

Notes: