Cebaite-(Nd) Mineral Data

General Cebaite-(Nd) Information

Chemical Formula:

Ba3(Nd,Ce)2(CO3)5F2

Composition:

Molecular Weight = 1,036.44 gm

Barium 39.75 % Ba 44.38 % BaO

Cerium 6.76 % Ce 7.92 % Ce₂O₃

Carbon 5.79 % C 21.23 % CO₂

Neodymium 20.88 % Nd 24.35 % Nd₂O₃

Oxygen 23.16 % O

Fluorine 3.67 % F 3.67 % F

- % F -1.54 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ba₃Nd_1.5Ce_0.5(CO₃)₅F₂

IMA Status:

Not Approved IMA 1988 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named after the composition.

Cebaite-(Nd) Crystallography

Crystal System:

Monoclinic Space Group: Unk

Physical Properties of Cebaite-(Nd)

Color:

Yellow, Dark yellow.

Density:

4.8

Hardness:

4.5-5 - Near Apatite

Luster:

Vitreous - Waxy

Optical Properties of Cebaite-(Nd)

Optical Data:

NCalc= 1.71 - from Gladstone-Dale relationship (KC = 0.1481) where Ncalc=Dmeas*KC+1

Calculated Properties of Cebaite-(Nd)

Electron Density:

Bulk Density (Electron Density)=4.21 gm/cc
note: Specific Gravity of Cebaite-(Nd) =4.80 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Cebaite-(Nd)= 341.72 barns/electron
U=PE_Cebaite-(Nd) x r_electron=1,440.16 barns/cc.

Radioactivity:

GRapi = 25,880.94 (Gamma Ray American Petroleum Institute Units)
Concentration of Cebaite-(Nd) per GRapi unit = 38.64 (PPM)

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

**Estimated Radioactivity from Cebaite-(Nd)** - 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	619,017	1.67E-05	25,880.94	8.51
100 gm / 3.41 cm	61,902	1.67E-06	2,588.09	0.85
10 gm / 1.58 cm	6,190	1.67E-07	258.81	0.09
1 gm / 7.36 mm	619	1.67E-08	25.88	0.01
0.1 gm / 3.41 mm	62	1.67E-09	2.59	0.00
0.01 gm / 1.58 mm	6	1.67E-10	0.26	0.00
0.001 gm / 0.74 mm	1	1.67E-11	0.03	0.00

Weight of pure Cebaite-(Nd) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.80 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 ( 1.38 % Th) From Sum REE Elements (27.63 % REE)

Cebaite-(Nd) Classification

Dana Class:

16a.01.09.02 (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-(Nd) Information

References:

PHYS. PROP.(Am.Min.,Vol.73,p1493,1988)

See Also:

Links to other databases for Cebaite-(Nd) :
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 Cebaite-(Nd) Specimen Label here :

Cebaite-(Nd)

Ba3(Nd,Ce)2(CO3)5F2
Dana No: 16a.01.09.02 Strunz No: 05.BD.15
Locality:

Notes: