Mineralogy Database

Haleniusite-(La) Mineral Data

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General Haleniusite-(La) Information

Help on Chemical  Formula: Chemical Formula: (La,Ce)OF
Help on Composition: Composition: Molecular Weight = 174.90 gm
   Lanthanum      36.53 %  La   42.84 % La2O3
   Cerium         35.25 %  Ce   41.29 % Ce2O3
   Praeseodymium   1.61 %  Pr    1.89 % Pr2O3
   Neodymium       6.60 %  Nd    7.70 % Nd2O3
   Oxygen          9.15 %  O
   Fluorine       10.86 %  F    10.86 % F
                    -   %   F    -4.57 % -O=F2    
                 ______        ______ 
                 100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: La0.46Ce0.44Nd0.08Pr0.02OF
Help on Environment: Environment: Coarsely crystalline bastn�site-(La), now largely replaced by h�leniusite-(La),
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Mine dumps of Bastn�s deposit, Skinnskatteberg District, V�stmanland County, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Ulf H�lenius (1951-), head of the Department of Mineralogy of the Swedish Museum of Natural History, for his contributions to the spectroscopy of minerals and the mineral sciences in general.
Help on Synonym: Synonym: IMA2003-028

Haleniusite-(La) Image

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Comments: Secondary electron microscope (SEM) image showing tabular brochantite crystals growing on a featureless håleniusite-(La) substrate. (CanMin 42:1099).
Location: Mine dumps of Bastnäs deposit, Skinnskatteberg District, Västmanland County, Sweden. Scale: Scale Bar 100 µ-m.
© Canadian Mineralogist

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Comments: Back-scattered electron (BSE) micrograph of a section of bastnäsite-(La) showing partial alteration to håleniusite-(La), which is white on the image. Black areas are voids. (CanMin 42:1099).
Location: Mine dumps of Bastnäs deposit, Skinnskatteberg District, Västmanland County, Sweden. Scale: Scale Bar 100 µ-m.
© Canadian Mineralogist

Haleniusite-(La) Crystallography

Help on Cell Dimensions: Cell Dimensions: a = 5.6282, Z = 4; V = 178.28 Den(Calc)= 6.52
Help on Crystal System: Crystal System: Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F m3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.252(1)(111), 1.991(0.56)(220), 1.697(0.39)(311),2.815(0.26)(200), 1.292(0.15)(331),

Physical Properties of Haleniusite-(La)

Help on Cleavage: Cleavage: Unknown, Unknown, Unknown
Help on Color: Color: Light yellow.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Powdery - Forms a loose, poorly-coherent pulverulent mass.
Help on Luster: Luster: Earthy (Dull)
Help on Streak: Streak: pale yellow

Optical Properties of Haleniusite-(La)

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.077 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1304,KC= 0.1412
Ncalc = 1.92
Help on Optical Data: Optical Data: Isotropic, n=1.85.

Calculated Properties of Haleniusite-(La)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.57 gm/cc
note: Specific Gravity of Haleniusite-(La) =6.52 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHaleniusite-(La) = 424.16 barns/electron
U=PEHaleniusite-(La) x relectron=2,362.91 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 72,901.47 (Gamma Ray American Petroleum Institute Units)
Concentration of Haleniusite-(La) per GRapi unit = 13.72 (PPM)

Haleniusite-(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) 417.23 ±104.31 grams of pure Haleniusite-(La) .

Estimated Radioactivity from Haleniusite-(La) - weak
Curies (Ci)
If Held in Hand
For One Hour
1000 gm / 6.64 cm 1,791,778 4.84E-05 72,901.47 23.97
100 gm / 3.08 cm 179,178 4.84E-06 7,290.15 2.40
10 gm / 1.43 cm 17,918 4.84E-07 729.01 0.24
1 gm / 6.64 mm 1,792 4.84E-08 72.90 0.02
0.1 gm / 3.08 mm 179 4.84E-09 7.29 0.00
0.01 gm / 1.43 mm 18 4.84E-10 0.73 0.00
0.001 gm / 0.66 mm 2 4.84E-11 0.07 0.00

Weight of pure Haleniusite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 6.52 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 ( 4.00 % Th) From Sum REE Elements (79.99 % REE)

Haleniusite-(La) Classification

Help on  Dana Class: Dana Class: (10)Oxyhalides and Hydroxyhalides
  (10.02)where A (O,OH) Xq
  (10.02.10)Dana Group Haleniusite-(La)! (La,Ce)OF F m3m 4/m 3 2/m
Help on  Strunz Class: Strunz Class: 03.DE.05 03 - HALIDES
  03.D - Oxyhalides, Hydroxyhalides and Related Double Halides
  03.DE -With Rare-Earth Elements
03.DE.05 Haleniusite-(La)! (La,Ce)OF F m3m 4/m 3 2/m

Other Haleniusite-(La) Information

Help on References: References: NAME( CanMin, 42:1097) PHYS. PROP.(CanMin, 42:1097) OPTIC PROP.(CanMin, 42:1097)
Help on See Also: See Also: Links to other databases for Haleniusite-(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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Dana No: Strunz No: 03.DE.05





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