Zhonghuacerite-(Ce) Mineral Data

General Zhonghuacerite-(Ce) Information

Chemical Formula:

Ba2Ce(CO3)3F

Composition:

Molecular Weight = 613.84 gm

Barium 44.74 % Ba 49.96 % BaO

Lanthanum 6.79 % La 7.96 % La₂O₃

Cerium 13.70 % Ce 16.04 % Ce₂O₃

Carbon 5.87 % C 21.51 % CO₂

Neodymium 2.35 % Nd 2.74 % Nd₂O₃

Oxygen 23.46 % O

Fluorine 3.09 % F 3.09 % F

- % F -1.30 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba₂Ce_0.6La_0.3Nd_0.1(CO₃)₃F

Environment:

Metamorphosed dolomite.

IMA Status:

Approved IMA 1981

Locality:

Bayan Obo iron mine, Baotou (Paotow), Inner Mongolia, China. Link to MinDat.org Location Data.

Name Origin:

Named in Chinese for "a cerium mineral from China".

Name Pronunciation:

Zhonghuacerite-(Ce) + Pronunciation

Synonym:

ICSD 41288

PDF 41-1414

Zhonghuacerite-(Ce) Image

Images:

Zhonghuacerite-(Ce) Huanghoite-(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

Zhonghuacerite-(Ce) Crystallography

Axial Ratios:

a:b:c =2.6221:1:1.3023

Cell Dimensions:

a = 13.365, b = 5.097, c = 6.638, Z = 2; beta = 106.45° V = 433.68 Den(Calc)= 4.70

Crystal System:

Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2₁/m

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

By Intensity(I/I_o): 3.27(1)(310), 4.01(0.78)(111), 3.24(0.42)(202), 2.52(0.37)(112), 3.98(0.36)(201), 2.15(0.32)(221), 2.13(0.29)(512), 2.55(0.22)(020), 2.01(0.2)(421),

Physical Properties of Zhonghuacerite-(Ce)

Color:

Yellow, Light brown.

Density:

4.2 - 4.4, Average = 4.3

Diaphaneity:

Transparent

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

4.5 - Between Fluorite and Apatite

Luster:

Vitreous - Resinous

Streak:

white

Optical Properties of Zhonghuacerite-(Ce)

Gladstone-Dale:

CI meas= -0.019 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1394,KPDmeas= 0.1523,KC= 0.1494
Ncalc = 1.63 - 1.7

Optical Data:

Uniaxial (-), e=1.565, w=1.745, bire=0.1800.

Calculated Properties of Zhonghuacerite-(Ce)

Electron Density:

Bulk Density (Electron Density)=3.77 gm/cc
note: Specific Gravity of Zhonghuacerite-(Ce) =4.30 gm/cc.

Fermion Index:

Fermion Index = 0.08
Boson Index = 0.92

Photoelectric:

PE_{Zhonghuacerite-(Ce)}= 324.33 barns/electron
U=PE_{Zhonghuacerite-(Ce)} x r_electron=1,221.86 barns/cc.

Radioactivity:

GRapi = 21,338.84 (Gamma Ray American Petroleum Institute Units)
Concentration of Zhonghuacerite-(Ce) per GRapi unit = 46.86 (PPM)

Zhonghuacerite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Zhonghuacerite-(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 / 7.63 cm	511,479	1.38E-05	21,338.84	7.02
100 gm / 3.54 cm	51,148	1.38E-06	2,133.88	0.70
10 gm / 1.64 cm	5,115	1.38E-07	213.39	0.07
1 gm / 7.63 mm	511	1.38E-08	21.34	0.01
0.1 gm / 3.54 mm	51	1.38E-09	2.13	0.00
0.01 gm / 1.64 mm	5	1.38E-10	0.21	0.00
0.001 gm / 0.76 mm	1	1.38E-11	0.02	0.00

Weight of pure Zhonghuacerite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.30 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 ( 1.14 % Th) From Sum REE Elements (22.83 % REE)

Zhonghuacerite-(Ce) Classification

Dana Class:

16a.01.08.01 (16a)Carbonates - Hydroxyl or Halogen

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

(16a.01.08)Dana Group

16a.01.08.01 Zhonghuacerite-(Ce) Ba2Ce(CO3)3F P 2₁/m 2/m

16a.01.08.02 Kukharenkoite-(Ce)! Ba2Ce(CO3)3F P 2₁/m 2/m

16a.01.08.03 Kukharenkoite-(La)! Ba2(La,Ce)(CO3)3F P 2₁/m 2/m

Strunz Class:

05.BD.10 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

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

05.BD.10 Kukharenkoite-(Ce)! Ba2Ce(CO3)3F P 2₁/m 2/m

05.BD.10 Zhonghuacerite-(Ce) Ba2Ce(CO3)3F P 2₁/m 2/m

05.BD.10 Kukharenkoite-(La)! Ba2(La,Ce)(CO3)3F P 2₁/m 2/m

Other Zhonghuacerite-(Ce) Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, MinCryst) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Zhonghuacerite-(Ce) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info
12 - WWW-MINCRYST

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Zhonghuacerite-(Ce)

Ba2Ce(CO3)3F
Dana No: 16a.01.08.01 Strunz No: 05.BD.10
Locality:

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