Nioboaeschynite-(Y) Mineral Data (original) (raw)
General Nioboaeschynite-(Y) Information
Chemical Formula:
[(Y,REE),Ca,Th,Fe](Nb,Ti,Ta)2(O,OH)6
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
Empirical Formula:
Y0.19REE0.34Ca0.31Th0.18U0.009Mn2+0.006Nb0.94Ti0.92Ta0.07Fe3+0.11O6
Environment:
Found in a series of calcite vein-dikes. Aeschynite group
IMA Status:
Approved IMA 2006 (Dana # Added)
Locality:
Bear Lake Diggings, Bancroft area, Ontario, Canada. Link to MinDat.org Location Data.
Name Origin:
Named for the dominant B-site cation, niobium and for the aeschynite group.
Synonym:
IMA2003-038a
Niobo-aeschynite-(Y) - Renamed Nioboaeschynite-(Y) by Mineralogical Record, v39 (2008), p131
Nioboaeschynite-(Y) Image
Images:
Nioboaeschynite-(Y) Crystallography
Axial Ratios:
a:b:c =0.4813:1:0.6787
Cell Dimensions:
a = 5.279, b = 10.966, c = 7.443, Z = 4; V = 430.87 Den(Calc)= 5.68
Crystal System:
Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbnm
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)
Cleavage:
None
Color:
Deep brownish black, Black.
Density:
5.34
Diaphaneity:
Translucent
Fracture:
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Hardness:
5-6 - Between Apatite and Orthoclase
Luster:
Vitreous (Glassy)
Streak:
grayish brown
Optical Properties of Nioboaeschynite-(Y)
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
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
| RelativeIntensity | 0% | 70% | 100% | 140% | 210% | 280% | 350% | 420% | 490% | 560% | 630% | 640% |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| R |
Calculated Relative Intensity Colors of Nioboaeschynite-(Y) in Oil
| RelativeIntensity | 0% | 100% | 200% | 300% | 400% | 500% | 600% | 700% | 800% | 900% | 1000% |
|---|---|---|---|---|---|---|---|---|---|---|---|
| R |
Calculated Properties of Nioboaeschynite-(Y)
Electron Density:
Bulk Density (Electron Density)=5.12 gm/cc
note: Specific Gravity of Nioboaeschynite-(Y) =5.68 gm/cc.
Fermion Index:
Fermion Index = 0.04
Boson Index = 0.96
Photoelectric:
PENioboaeschynite-(Y) = 447.63 barns/electron
U=PENioboaeschynite-(Y) x relectron=2,293.26 barns/cc.
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
| SpecimenSizeWeight/Volume(Sphere) * | CalculatedActivityBecquerels(Bq) | CalculatedActivityCuries (Ci) | EstimatedActivityGR(api) | EstimatedExposure(mRem**)/hrIf Held in HandFor 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
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
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
References:
NAME( AmMin, v93:1943) PHYS. PROP.(AmMin, v93:1943) OPTIC PROP.(AmMin, v93:1943)
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: