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Yttrotantalite-(Y) Mineral Data

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General Yttrotantalite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,U,Fe++)(Ta,Nb)O4
Help on Composition: Composition: Molecular Weight = 315.74 gm
   Yttrium   19.71 %  Y    25.03 % Y2O3
   Uranium    7.54 %  U     8.55 % UO2
   Tantalum  40.12 %  Ta   48.98 % Ta2O5
   Niobium    8.83 %  Nb   12.63 % Nb2O5
   Iron       3.54 %  Fe    4.55 % FeO
   Oxygen    20.27 %  O
            ______        ______ 
            100.00 %       99.75 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.7Fe2+0.2U0.1Ta0.7Nb0.3O4
Help on Environment: Environment: Accessory mineral in granite pegmatites.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1802
Help on Locality: Locality: Ytterby, Sweden. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for its YTTRium content and relation to tantalite.
Help on Name Pronunciation: Name Pronunciation: Yttrotantalite-(Y) + Pronunciation Say YTTROTANTALITE-(Y)
 

Yttrotantalite-(Y) Image

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  Yttrotantalite-(Y)

Comments: Dark greenish-black crystal of Yttrotantalite-(Y).
Location: Ytterby, Resarö, Vaxholm, Stockholm, Sweden. Scale: Picture size 8 mm.
© Thomas Witzke / Abraxas-Verlag

Yttrotantalite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.4881:1:0.4634
Help on Cell Dimensions: Cell Dimensions: a = 5.34, b = 10.94, c = 5.07, Z = 3; beta = 95.3° V = 294.92 Den(Calc)= 5.33
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: I2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 1.81(0.9), 1.55(0.9),2.56(0.6), 1.183(0.6), 1.152(0.6), 1.053(0.5),
Help on Forms: Forms:

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Forms: ( 2 1 0) ( 0 1 1) ( 0 1 0) ( 1 1 0) ( 0 0 1)

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Physical Properties of Yttrotantalite-(Y)

Help on Cleavage: Cleavage: {010} Imperfect
Help on Color: Color: Brownish black, Yellowish brown, Yellow.
Help on Density: Density: 5.5 - 5.9, Average = 5.7
Help on Diaphaneity: Diaphaneity: Opaque to subtranslucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5-5.5 - Apatite-Knife Blade
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: colorless gray
 

Optical Properties of Yttrotantalite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.205 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.288 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2158,KPDmeas= 0.2018,KC= 0.1675
Ncalc = 1.89 - 1.99
Help on Optical Data: Optical Data: Isotropic, n=2.15.
 

Calculated Properties of Yttrotantalite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.95 gm/cc
note: Specific Gravity of Yttrotantalite-(Y) =5.70 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0014381814
Boson Index = 0.9985618186
Help on Photoelectric: Photoelectric: PEYttrotantalite-(Y) = 714.82 barns/electron
U=PEYttrotantalite-(Y) x relectron=3,538.41 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 558,050.16 (Gamma Ray American Petroleum Institute Units)
Concentration of Yttrotantalite-(Y) per GRapi unit =1,791.95 (PPB)

Yttrotantalite-(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) 54.51 ± 13.63 grams of pure Yttrotantalite-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 5450.5 ±1362.6 grams of pure Yttrotantalite-(Y) .

Estimated Radioactivity from Yttrotantalite-(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 13,494,410 3.65E-04 558,050.16 183.47
100 gm / 3.22 cm 1,349,441 3.65E-05 55,805.02 18.35
10 gm / 1.50 cm 134,944 3.65E-06 5,580.50 1.83
1 gm / 6.95 mm 13,494 3.65E-07 558.05 0.18
0.1 gm / 3.22 mm 1,349 3.65E-08 55.81 0.02
0.01 gm / 1.50 mm 135 3.65E-09 5.58 0.00
0.001 gm / 0.69 mm 13 3.65E-10 0.56 0.00

Weight of pure Yttrotantalite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.70 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
 

Yttrotantalite-(Y) Classification

Help on  Dana Class: Dana Class: 08.01.03.01 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.03)Yttroantalalite-Yttrocolumbite Series
 
08.01.03.01 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m
 
08.01.03.02 Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 Unk Ortho
 
08.01.03.03 Iwashiroite-(Y)! YTaO4 P 2/a 2/m
Help on  Strunz Class: Strunz Class: 04.DG.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DG -With large (� medium-sized) cations; chains of edge-sharing octahedra
 
04.DG.10 Fergusonite-beta-(Nd) (Nd,Ce)NbO4 I2 2
 
04.DG.10 Fergusonite-beta-(Y) YNbO4 I2 2
 
04.DG.10 Fergusonite-beta-(Ce) (Ce,La,Nd)NbO4 I2 2
 
04.DG.10 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m
 

Other Yttrotantalite-(Y) Information

Help on References: References: NAME( AntBidBlaNic3) 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 Yttrotantalite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Print or Cut-and-Paste your Yttrotantalite-(Y) Specimen Label here :

Yttrotantalite-(Y)

(Y,U,Fe++)(Ta,Nb)O4
Dana No: 08.01.03.01 Strunz No: 04.DG.10
Locality:

 

Notes:

 

 
   
 


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