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Tanteuxenite-(Y) Mineral Data

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General Tanteuxenite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6
Help on Composition: Composition: Molecular Weight = 480.83 gm
   Calcium    1.67 %  Ca    2.33 % CaO
   Cerium     2.91 %  Ce    3.41 % Ce2O3
   Yttrium   12.94 %  Y    16.44 % Y2O3
   Tantalum  52.69 %  Ta   64.33 % Ta2O5
   Titanium   1.99 %  Ti    3.32 % TiO2
   Niobium    7.73 %  Nb   11.06 % Nb2O5
   Hydrogen   0.10 %  H     0.94 % H2O
   Oxygen    19.96 %  O
            ______        ______ 
            100.00 %      101.83 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.7Ca0.2Ce0.12(Ta0.7)2(Nb0.2)2(Ti0.1)O5.5(OH)0.5
Help on Environment: Environment: Tin placers.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1928
Help on Locality: Locality: Cooglegong, Pilbara, WA, Australia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition (Tantalum) and the Greek for "friendly to strangers, hospitable," in allusion to the rare elements that it contains.
Help on Name Pronunciation: Name Pronunciation: Tanteuxenite-(Y) + Pronunciation Say TANTEUXENITE-(Y)
Help on Synonym: Synonym: Delorenzite
 

Tanteuxenite-(Y) Image

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  Tanteuxenite-(Y)

Comments: Irregular fragment of tanteuxenite-(Y).
Location: Liha, Maniema, Democratic Republic of Congo (Zaïre). Scale: Specimen Size 1.5 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Tanteuxenite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3555:1:0.3788
Help on Cell Dimensions: Cell Dimensions: a = 5.18, b = 14.57, c = 5.52, Z = 3; V = 416.61 Den(Calc)= 5.75
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pcan
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.12(1), 2.87(0.7), 2.52(0.3),2.67(0.3), 2.15(0.1), 2.28(0.1),
Help on Forms: Forms:

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Drag1 - Manipulate Crystal
Drag2 - Resize

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Help on Above

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

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Physical Properties of Tanteuxenite-(Y)

Help on Cleavage: Cleavage: {???} Indistinct
Help on Color: Color: Brownish black.
Help on Density: Density: 5.4 - 5.9, Average = 5.65
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Fracture: Fracture: Sub Conchoidal - Fractures developed in brittle materials characterized by semi-curving surfaces.
Help on Habit: Habit: Indistinct - Crystals or grains are unremarkable or poorly formed. Anhedral to subhedral crystals.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Habit: Habit: Tabular - Form dimensions are thin in one direction.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Resinous
Help on Streak: Streak: brownish gray
 

Optical Properties of Tanteuxenite-(Y)

Help on Optical Data: Optical Data: NCalc= 2.04 - from Gladstone-Dale relationship (KC = 0.1808) where Ncalc=Dcalc*KC+1
NCalc= 2.02 - from Gladstone-Dale relationship (KC = 0.1808) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Tanteuxenite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=4.99 gm/cc
note: Specific Gravity of Tanteuxenite-(Y) =5.75 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0027568138
Boson Index = 0.9972431862
Help on Photoelectric: Photoelectric: PETanteuxenite-(Y) = 671.48 barns/electron
U=PETanteuxenite-(Y) x relectron=3,350.09 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 2,697.01 (Gamma Ray American Petroleum Institute Units)
Concentration of Tanteuxenite-(Y) per GRapi unit = 370.78 (PPM)

Estimated Radioactivity from Tanteuxenite-(Y) - mild
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 / 6.93 cm 65,275 1.76E-06 2,697.01 0.89
100 gm / 3.21 cm 6,528 1.76E-07 269.70 0.09
10 gm / 1.49 cm 653 1.76E-08 26.97 0.01
1 gm / 6.93 mm 65 1.76E-09 2.70 0.00
0.1 gm / 3.21 mm 7 1.76E-10 0.27 0.00
0.01 gm / 1.49 mm 1 1.76E-11 0.03 0.00
0.001 gm / 0.69 mm 0 1.76E-12 0.00 0.00

Weight of pure Tanteuxenite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.75 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 ( 0.15 % Th) From Sum REE Elements ( 2.91 % REE)
 

Tanteuxenite-(Y) Classification

Help on  Dana Class: Dana Class: 08.03.08.03 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.03)where A (B2O6)
  (08.03.08)Polycrase Group
 
08.03.08.01 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m
 
08.03.08.02 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m
 
08.03.08.03 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 2/m
 
08.03.08.04 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho
 
08.03.08.05 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.DG.05 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.05 Fersmite (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 Pcan 2/m 2/m 2/m
 
04.DG.05 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m
 
04.DG.05 Kobeite-(Y) (Y,U)(Ti,Nb)2(O,OH)6(?) Cubic Cubic
 
04.DG.05 Loranskite-(Y) (Y,Ce,Ca)ZrTaO6(?) Unk Ortho
 
04.DG.05 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m
 
04.DG.05 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 2/m
 
04.DG.05 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m
 
04.DG.05 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho
 

Other Tanteuxenite-(Y) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Tanteuxenite-(Y) :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - MinDAT
8 - Mineralienatlas (Deutsch)
9 - Online Mineral Museum
10 - QUT Mineral Atlas
11 - Ruff.Info

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

Tanteuxenite-(Y)

(Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6
Dana No: 08.03.08.03 Strunz No: 04.DG.05
Locality:

 

Notes:

 

 
   
 


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