Cebaite-(Ce) Mineral Data

[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide

General Cebaite-(Ce) Information

Chemical Formula:

Ba3Ce2(CO3)5F2

Composition:

Molecular Weight = 1,030.25 gm

Barium 39.99 % Ba 44.65 % BaO

Cerium 27.20 % Ce 31.86 % Ce₂O₃

Carbon 5.83 % C 21.36 % CO₂

Oxygen 23.29 % O

Fluorine 3.69 % F 3.69 % F

- % F -1.55 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba₃Ce₂(CO₃)₅F₂

Environment:

Fe-Nb rare-earth deposit.

IMA Status:

Approved IMA 1973

Locality:

East mine, Bayan Obo, Inner Mongolia, China. Link to MinDat.org Location Data.

Name Origin:

Named after the composition.

Synonym:

ICSD 81121

PDF 43-691

Cebaite-(Ce) Image

Images:

Cebaite-(Ce)

Comments: Gemmy yellow to orange-yellow massive cebaite-(Ce); some cleavage evident, associated with green aegirine.
Location: Baiyun-Obo mine, Inner Mongolia, China. Scale: See Image.
© Rruff Database

Cebaite-(Ce) Crystallography

Axial Ratios:

a:b:c =4.2555:1:2.6295

Cell Dimensions:

a = 21.4256, b = 5.0348, c = 13.2395, Z = 4; beta = 91.613° V = 1,427.63 Den(Calc)= 4.79

Crystal System:

MonoclinicSpace Group: C 2/m or C 2

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

By Intensity(I/I_o): 3.25(1), 1.99(0.9), 3.98(0.8),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Yang Z , Neues Jahrbuch fur Mineralogie, Monatshefte , 1995 (1995) p.56-64, Structure redetermination of natural cebaite-(Ce), Ba3Ce2(CO3)5F2, Locality: Bayan Obo REE-Nb-Fe deposit, Inner Mongolia, China

Physical Properties of Cebaite-(Ce)

Cleavage:

{301} Indistinct

Color:

Gray white, Orange.

Density:

4.81

Fracture:

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

Hardness:

4.5-5 - Near Apatite

Luster:

Vitreous - Waxy

Streak:

gray white

Optical Properties of Cebaite-(Ce)

Gladstone-Dale:

CI meas= 0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.034 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1447,KPDmeas= 0.1441,KC= 0.1498
Ncalc = 1.72

Optical Data:

Biaxial (-), a=1.598-1.604, b=1.735, g=1.74-1.748, bire=0.1420-0.1440, 2V(Calc)=20-32, 2V(Meas)=5.

Calculated Properties of Cebaite-(Ce)

Electron Density:

Bulk Density (Electron Density)=4.20 gm/cc
note: Specific Gravity of Cebaite-(Ce) =4.79 gm/cc.

Fermion Index:

Fermion Index = 0.07
Boson Index = 0.93

Photoelectric:

PE_Cebaite-(Ce)= 325.88 barns/electron
U=PE_Cebaite-(Ce) x r_electron=1,369.67 barns/cc.

Radioactivity:

GRapi = 25,457.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Cebaite-(Ce) per GRapi unit = 39.28 (PPM)

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

**Estimated Radioactivity from Cebaite-(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 / 7.36 cm	609,282	1.65E-05	25,457.94	8.37
100 gm / 3.42 cm	60,928	1.65E-06	2,545.79	0.84
10 gm / 1.59 cm	6,093	1.65E-07	254.58	0.08
1 gm / 7.36 mm	609	1.65E-08	25.46	0.01
0.1 gm / 3.42 mm	61	1.65E-09	2.55	0.00
0.01 gm / 1.59 mm	6	1.65E-10	0.25	0.00
0.001 gm / 0.74 mm	1	1.65E-11	0.03	0.00

Weight of pure Cebaite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.79 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 ( 1.36 % Th) From Sum REE Elements (27.20 % REE)

Cebaite-(Ce) Classification

Dana Class:

16a.01.09.01 (16a)Carbonates - Hydroxyl or Halogen

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

(16a.01.09)Dana Group

16a.01.09.01 Cebaite-(Ce) Ba3Ce2(CO3)5F2 C 2/m or C 2 Mono

16a.01.09.02 Cebaite-(Nd)! Ba3(Nd,Ce)2(CO3)5F2 Unk Mono

Strunz Class:

05.BD.15 05 - CARBONATES (NITRATES)

05.B - Carbonates with additional anions, without H2O

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

05.BD.15 Cebaite-(Nd)! Ba3(Nd,Ce)2(CO3)5F2 Unk Mono

05.BD.15 Cebaite-(Ce) Ba3Ce2(CO3)5F2 C 2/m or C 2 Mono

Other Cebaite-(Ce) Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

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

Search for Cebaite-(Ce) using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Cebaite-(Ce) :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Cebaite-(Ce) Mineral Data :

Ask about Cebaite-(Ce) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Cebaite-(Ce)

Ba3Ce2(CO3)5F2
Dana No: 16a.01.09.01 Strunz No: 05.BD.15
Locality:

Notes: