Haleniusite-(La) Mineral Data

General Haleniusite-(La) Information

Chemical Formula:

(La,Ce)OF

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

Empirical Formula:

La_0.46Ce_0.44Nd_0.08Pr_0.02OF

Environment:

Coarsely crystalline bastnï¿½site-(La), now largely replaced by hï¿½leniusite-(La),

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Mine dumps of Bastnï¿½s deposit, Skinnskatteberg District, Vï¿½stmanland County, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named for Ulf Hï¿½lenius (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.

Synonym:

IMA2003-028

Haleniusite-(La) Image

Images:

Haleniusite-(La)

Comments: Secondary electron microscope (SEM) image showing tabular brochantite crystals growing on a featureless hÃ¥leniusite-(La) substrate. (CanMin 42:1099).
Location: Mine dumps of BastnÃ¤s deposit, Skinnskatteberg District, VÃ¤stmanland County, Sweden. Scale: Scale Bar 100 µ-m.
© Canadian Mineralogist

Images:

Haleniusite-(La)

Comments: Back-scattered electron (BSE) micrograph of a section of bastnÃ¤site-(La) showing partial alteration to hÃ¥leniusite-(La), which is white on the image. Black areas are voids. (CanMin 42:1099).
Location: Mine dumps of BastnÃ¤s deposit, Skinnskatteberg District, VÃ¤stmanland County, Sweden. Scale: Scale Bar 100 µ-m.
© Canadian Mineralogist

Haleniusite-(La) Crystallography

Cell Dimensions:

a = 5.6282, Z = 4; V = 178.28 Den(Calc)= 6.52

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/I_o): 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)

Cleavage:

Unknown, Unknown, Unknown

Color:

Light yellow.

Diaphaneity:

Translucent

Habit:

Powdery - Forms a loose, poorly-coherent pulverulent mass.

Luster:

Earthy (Dull)

Streak:

pale yellow

Optical Properties of Haleniusite-(La)

Gladstone-Dale:

CI calc= 0.077 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1304,KC= 0.1412
Ncalc = 1.92

Optical Data:

Isotropic, n=1.85.

Calculated Properties of Haleniusite-(La)

Electron Density:

Bulk Density (Electron Density)=5.57 gm/cc
note: Specific Gravity of Haleniusite-(La) =6.52 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Haleniusite-(La)}= 424.16 barns/electron
U=PE_{Haleniusite-(La)} x r_electron=2,362.91 barns/cc.

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
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 / 6.64 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

Dana Class:

10.02.10.01 (10)Oxyhalides and Hydroxyhalides

(10.02)where A (O,OH) Xq

(10.02.10)Dana Group

10.02.10.01 Haleniusite-(La)! (La,Ce)OF F m3m 4/m 3 2/m

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

References:

NAME( CanMin, 42:1097) PHYS. PROP.(CanMin, 42:1097) OPTIC PROP.(CanMin, 42:1097)

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

Haleniusite-(La)

(La,Ce)OF
Dana No: 10.02.10.01 Strunz No: 03.DE.05
Locality:

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