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Nioboaeschynite-(Y) Mineral Data

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General Nioboaeschynite-(Y) Information

Help on Chemical  Formula: Chemical Formula: [(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6
Help on Composition: Composition: Molecular Weight = 368.70 gm
   Calcium           3.37 %  Ca    4.71 % CaO
   La,Ce,Pr,Nd,Sm,  13.28 %  RE   15.49 % REE2O3
   Yttrium           4.58 %  Y     5.82 % Y2O3
   Thorium          11.33 %  Th   12.89 % ThO2
   Uranium           0.58 %  U     0.66 % UO2
   Tantalum          3.44 %  Ta    4.19 % Ta2O5
   Titanium         11.95 %  Ti   19.93 % TiO2
   Manganese         0.09 %  Mn    0.12 % MnO
   Niobium          23.69 %  Nb   33.88 % Nb2O5
   Iron              1.67 %  Fe    2.38 % Fe2O3
   Oxygen           26.04 %  O
                   ______        ______ 
                   100.00 %      100.08 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.19REE0.34Ca0.31Th0.18U0.009Mn2+0.006Nb0.94Ti0.92Ta0.07Fe3+0.11O6
Help on Environment: Environment: Found in a series of calcite vein-dikes. Aeschynite group
Help on IMA Status: IMA Status: Approved IMA 2006 (Dana # Added)
Help on Locality: Locality: Bear Lake Diggings, Bancroft area, Ontario, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the dominant B-site cation, niobium and for the aeschynite group.
Help on Synonym: Synonym: IMA2003-038a
  Niobo-aeschynite-(Y) - Renamed Nioboaeschynite-(Y) by Mineralogical Record, v39 (2008), p131
 

Nioboaeschynite-(Y) Image

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  Nioboaeschynite-(Y)

Comments: BSE image of a nioboaeschynite-(Y) grain. (CanMin, v46:395).
Location: Bear Lake Diggings, Bancroft area, Ontario, Canada. Scale: See Image.
© Canadian Mineralogist

Nioboaeschynite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4813:1:0.6787
Help on Cell Dimensions: Cell Dimensions: a = 5.279, b = 10.966, c = 7.443, Z = 4; V = 430.87 Den(Calc)= 5.68
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): 3.009(1), 2.931(0.69), 2.97(0.36),3.079(0.2), 1.58(0.16), 1.863(0.14), 2.636(0.12), 2.783(0.12),
 

Physical Properties of Nioboaeschynite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Deep brownish black, Black.
Help on Density: Density: 5.34
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: grayish brown
 

Optical Properties of Nioboaeschynite-(Y)

Help on Optical Data: Optical Data: NCalc= 2.39 - from Gladstone-Dale relationship (KC = 0.2454) where Ncalc=Dcalc*KC+1
NCalc= 2.31 - from Gladstone-Dale relationship (KC = 0.2454) where Ncalc=Dmeas*KC+1
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Nioboaeschynite-(Y) in Air
λ R  ∑ R(λ) 
 470 nm   14.60   
 546 nm   14.10 
 589 nm   13.80 
 650 nm   13.70 
Standardized Intensity (100%) Reflection Spectra of Nioboaeschynite-(Y) in Oil
λ R  ∑ R(λ) 
 470 nm    3.40   
 546 nm    3.30 
 589 nm    3.20 
 650 nm    3.20 
Calculated Relative Intensity Colors of Nioboaeschynite-(Y) in Air
Relative
Intensity
   0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 640%
R                        
Calculated Relative Intensity Colors of Nioboaeschynite-(Y) in Oil
Relative
Intensity
   0% 100% 200% 300% 400% 500% 600% 700% 800% 900% 1000%
R                      
 

Calculated Properties of Nioboaeschynite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.12 gm/cc
note: Specific Gravity of Nioboaeschynite-(Y) =5.68 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PENioboaeschynite-(Y) = 447.63 barns/electron
U=PENioboaeschynite-(Y) x relectron=2,293.26 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 262,689.28 (Gamma Ray American Petroleum Institute Units)
Concentration of Nioboaeschynite-(Y) per GRapi unit = 3.81 (PPM)

Nioboaeschynite-(Y) 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) 115.79 ± 28.95 grams of pure Nioboaeschynite-(Y) .

Estimated Radioactivity from Nioboaeschynite-(Y) - strong
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 / 6.95 cm 6,116,078 1.65E-04 262,689.28 86.36
100 gm / 3.23 cm 611,608 1.65E-05 26,268.93 8.64
10 gm / 1.50 cm 61,161 1.65E-06 2,626.89 0.86
1 gm / 6.95 mm 6,116 1.65E-07 262.69 0.09
0.1 gm / 3.23 mm 612 1.65E-08 26.27 0.01
0.01 gm / 1.50 mm 61 1.65E-09 2.63 0.00
0.001 gm / 0.70 mm 6 1.65E-10 0.26 0.00

Weight of pure Nioboaeschynite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.68 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
 

Nioboaeschynite-(Y) Classification

Help on  Dana Class: Dana Class: 08.03.06.07 (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-(Y) Information

Help on References: References: NAME( AmMin, v93:1943) PHYS. PROP.(AmMin, v93:1943) OPTIC PROP.(AmMin, v93:1943)
Help on See Also: See Also: Links to other databases for Nioboaeschynite-(Y) :
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-(Y) Specimen Label here :

Nioboaeschynite-(Y)

[(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6
Dana No: 08.03.06.07 Strunz No: 04.DF.05
Locality:

 

Notes:

 

 
   
 


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