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Nioboaeschynite-(Ce) Mineral Data

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General Nioboaeschynite-(Ce) Information

Help on Chemical  Formula: Chemical Formula: (Ce,Ca)(Nb,Ti)2(O,OH)6
Help on Composition: Composition: Molecular Weight = 367.65 gm
   Calcium    3.27 %  Ca    4.58 % CaO
   Cerium    22.87 %  Ce   26.78 % Ce2O3
   Titanium   3.26 %  Ti    5.43 % TiO2
   Niobium   44.22 %  Nb   63.26 % Nb2O5
   Hydrogen   0.27 %  H     2.45 % H2O
   Oxygen    26.11 %  O
            ______        ______ 
            100.00 %      102.50 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ce0.6Ca0.3Ti0.25Nb1.75O5(OH)
Help on Environment: Environment: In placer concentrates from the Tofty tin belt.
Help on IMA Status: IMA Status: Approved IMA 1960
Help on Locality: Locality: Vishnevye Gory, Ural Mountains, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named from the composition and the Greek for "shame," in allusion to the inability of chemists, at the time of its discovery, to separate some of its constituents.
Help on Synonym: Synonym: Aeschynite-(Ce)
  Niobo-aeschynite-(Ce) - Renamed Nioboaeschynite-(Ce) by Mineralogical Record, v39 (2008), p131
 

Nioboaeschynite-(Ce) Image

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  Nioboaeschynite-(Ce)

Comments: Opaque, resinous crystal fragment of nioboaeschynite-(Ce).
Location: Bayan Obo deposit, Darhan Muminggan United Banner, Baotou League, Inner Mongolia Autonomous Region, China. Scale: Picture Size 1 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Nioboaeschynite-(Ce) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4867:1:0.6842
Help on Cell Dimensions: Cell Dimensions: a = 5.396, b = 11.085, c = 7.585, Z = 4; V = 453.69 Den(Calc)= 5.38
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.96(1), 3.03(1), 1.55(0.6),
 

Physical Properties of Nioboaeschynite-(Ce)

Help on Color: Color: Black.
Help on Density: Density: 5.04
Help on Diaphaneity: Diaphaneity: Subtranslucent
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Hardness: Hardness: 5.3-5.6
Help on Luster: Luster: Resinous
 

Optical Properties of Nioboaeschynite-(Ce)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.011 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2342,KPDmeas= 0.25,KC= 0.2474
Ncalc = 2.25 - 2.33
Help on Optical Data: Optical Data: Isotropic, n=2.26.
 

Calculated Properties of Nioboaeschynite-(Ce)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.58 gm/cc
note: Specific Gravity of Nioboaeschynite-(Ce) =5.04 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0043796255
Boson Index = 0.9956203745
Help on Photoelectric: Photoelectric: PENioboaeschynite-(Ce) = 185.97 barns/electron
U=PENioboaeschynite-(Ce) x relectron= 851.74 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 22,164.84 (Gamma Ray American Petroleum Institute Units)
Concentration of Nioboaeschynite-(Ce) per GRapi unit = 45.12 (PPM)

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

Estimated Radioactivity from Nioboaeschynite-(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 / 7.24 cm 512,207 1.38E-05 22,164.84 7.29
100 gm / 3.36 cm 51,221 1.38E-06 2,216.48 0.73
10 gm / 1.56 cm 5,122 1.38E-07 221.65 0.07
1 gm / 7.24 mm 512 1.38E-08 22.16 0.01
0.1 gm / 3.36 mm 51 1.38E-09 2.22 0.00
0.01 gm / 1.56 mm 5 1.38E-10 0.22 0.00
0.001 gm / 0.72 mm 1 1.38E-11 0.02 0.00

Weight of pure Nioboaeschynite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.04 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 (22.87 % REE)
 

Nioboaeschynite-(Ce) Classification

Help on  Dana Class: Dana Class: 08.03.06.02 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.06)Aeschynite group
 
08.03.06.01 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 Pmnb 2/m 2/m 2/m
 
08.03.06.02 Nioboaeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
08.03.06.03 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
08.03.06.04 Tantalaeschynite-(Y) (Y,Ce,Ca)(Ta,Ti,Nb)2O6 Pbnm 2/m 2/m 2/m
 
08.03.06.05 Aeschynite-(Nd) (Nd,Ce)(Ti,Nb)2(O,OH)6 Pmnb ? 2/m 2/m 2/m
 
08.03.06.06 Nioboaeschynite-(Nd)! (Nd,Ce)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
08.03.06.07 Nioboaeschynite-(Y)! [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6 Pbnm 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DF.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DF -With large (� medium-sized) cations; dimers and trimers of edge-sharing octahedra
 
04.DF.05 Aeschynite-(Ce) (Ce,Ca,Fe)(Ti,Nb)2(O,OH)6 Pmnb 2/m 2/m 2/m
 
04.DF.05 Aeschynite-(Nd) (Nd,Ce)(Ti,Nb)2(O,OH)6 Pmnb ? 2/m 2/m 2/m
 
04.DF.05 Aeschynite-(Y) (Y,Ca,Fe)(Ti,Nb)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Nioboaeschynite-(Ce) (Ce,Ca)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Nioboaeschynite-(Nd)! (Nd,Ce)(Nb,Ti)2(O,OH)6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Rynersonite Ca(Ta,Nb)2O6 Pmnb 2/m 2/m 2/m
 
04.DF.05 Tantalaeschynite-(Y) (Y,Ce,Ca)(Ta,Ti,Nb)2O6 Pbnm 2/m 2/m 2/m
 
04.DF.05 Vigezzite (Ca,Ce)(Nb,Ta,Ti)2O6 Pmnb 2/m 2/m 2/m
 
04.DF.05 Nioboaeschynite-(Y)! [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6 Pbnm 2/m 2/m 2/m
 

Other Nioboaeschynite-(Ce) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Nioboaeschynite-(Ce) :
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 Nioboaeschynite-(Ce) Specimen Label here :

Nioboaeschynite-(Ce)

(Ce,Ca)(Nb,Ti)2(O,OH)6
Dana No: 08.03.06.02 Strunz No: 04.DF.05
Locality:

 

Notes:

 

 
   
 


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