Huanghoite-(Ce) Mineral Data

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General Huanghoite-(Ce) Information

Chemical Formula:

BaCe(CO3)2F

Composition:

Molecular Weight = 416.46 gm

Barium 32.97 % Ba 36.82 % BaO

Cerium 33.64 % Ce 39.41 % Ce₂O₃

Carbon 5.77 % C 21.14 % CO₂

Oxygen 23.05 % O

Fluorine 4.56 % F 4.56 % F

- % F -1.92 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaCe(CO₃)₂F

Environment:

Hydrothermal veins associated with rare-earth-bearing carbonatite deposits in alkaline igneous complexes.

IMA Status:

Approved IMA 1961

Locality:

Bayan Obo Fe-Nb-REE deposit, 130 km north of Baotou, Inner Mongolia, China. Link to MinDat.org Location Data.

Name Origin:

Named for Huang Ho (Yellow River), China, 150 km south of the Bayan Obo deposit, China, where the first specimens were collected.

Name Pronunciation:

Huanghoite-(Ce) + Pronunciation

Synonym:

ICSD 74178

PDF 15-286

Huanghoite-(Ce) Image

Images:

Click Here for Larger Huanghoite-(Ce) Image

Huanghoite-(Ce) Zhonghuacerite-(Ce)

Comments: Brown grains of zhonghuacerite-(Ce) in matrix. This type material may be Huanghoite-(Ce).
Location: Bayan Obo iron mine, Baotou, Inner Mongolia, China. Scale: Not Given.
© Diederik Visser

Huanghoite-(Ce) Crystallography

Axial Ratios:

a:c = 1:7.5828

Cell Dimensions:

a = 5.072, c = 38.46, Z = 6; V = 856.84 Den(Calc)= 4.84

Crystal System:

Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 1.937(1), 3.21(1), 2.01(0.9),

Crystal Structure:

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Yang Z M , Pertlik F , Neues Jahrbuch fur Mineralogie, Monatshefte , 1993 (1993) p.163-171, Huanghoite-(Ce), BaCe(CO3)2F, from Khibina, Kola peninsula, Russia:, Redetermination of the crystal structure with a discussion on space group symmetry, Locality: Khibina, Kola Peninsula, Russia

Physical Properties of Huanghoite-(Ce)

Cleavage:

{???} Indistinct, {0001} Distinct

Color:

Yellow green, Honey yellow.

Density:

4.51 - 4.67, Average = 4.59

Diaphaneity:

Translucent

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Hardness:

4.7

Luster:

Greasy (Oily)

Optical Properties of Huanghoite-(Ce)

Gladstone-Dale:

CI meas= 0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.062 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1413,KPDmeas= 0.149,KC= 0.1506
Ncalc = 1.68 - 1.73

Optical Data:

Uniaxial (-), e=1.603, w=1.765, bire=0.1620.

Calculated Properties of Huanghoite-(Ce)

Electron Density:

Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Huanghoite-(Ce) =4.59 gm/cc.

Fermion Index:

Fermion Index = 0.05
Boson Index = 0.95

Photoelectric:

PE_{Huanghoite-(Ce)}= 327.24 barns/electron
U=PE_{Huanghoite-(Ce)} x r_electron=1,320.03 barns/cc.

Radioactivity:

GRapi = 31,539.17 (Gamma Ray American Petroleum Institute Units)
Concentration of Huanghoite-(Ce) per GRapi unit = 31.71 (PPM)

Huanghoite-(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) 964.41 ±241.10 grams of pure Huanghoite-(Ce) .

**Estimated Radioactivity from Huanghoite-(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 / 7.47 cm	753,634	2.04E-05	31,539.17	10.37
100 gm / 3.47 cm	75,363	2.04E-06	3,153.92	1.04
10 gm / 1.61 cm	7,536	2.04E-07	315.39	0.10
1 gm / 7.47 mm	754	2.04E-08	31.54	0.01
0.1 gm / 3.47 mm	75	2.04E-09	3.15	0.00
0.01 gm / 1.61 mm	8	2.04E-10	0.32	0.00
0.001 gm / 0.75 mm	1	2.04E-11	0.03	0.00

Weight of pure Huanghoite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.59 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 ( 1.68 % Th) From Sum REE Elements (33.64 % REE)

Huanghoite-(Ce) Classification

Dana Class:

16a.01.04.01 (16a)Carbonates - Hydroxyl or Halogen

(16a.01)in the Bastnasite/Shynchysite/Parasite Groups

(16a.01.04)Dana Group

16a.01.04.01 Huanghoite-(Ce) BaCe(CO3)2F R 3m 3 2/m

16a.01.04.02 Qaqarssukite-(Ce)! Ba(Ce,REE)(CO3)2F P 3c1 3 2/m

Strunz Class:

05.BD.35 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

05.BD -With rare-earth elements (REE)

05.BD.35 Huanghoite-(Ce) BaCe(CO3)2F R 3m 3 2/m

Other Huanghoite-(Ce) Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Huanghoite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - Mineralienatlas (Deutsch)
11 - Online Mineral Museum
12 - QUT Mineral Atlas
13 - Ruff.Info

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

Huanghoite-(Ce)

BaCe(CO3)2F
Dana No: 16a.01.04.01 Strunz No: 05.BD.35
Locality:

Notes: