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Yttrocolumbite-(Y) Mineral Data

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General Yttrocolumbite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,U,Fe++)(Nb,Ta)O4
Help on Composition: Composition: Molecular Weight = 296.62 gm
   Yttrium   17.98 %  Y    22.84 % Y2O3
   Uranium   16.05 %  U    18.21 % UO2
   Tantalum  15.25 %  Ta   18.62 % Ta2O5
   Niobium   23.49 %  Nb   33.61 % Nb2O5
   Iron       5.65 %  Fe    7.27 % FeO
   Oxygen    21.58 %  O
            ______        ______ 
            100.00 %      100.54 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.6U0.2Fe2+0.3Nb0.75Ta0.25O4
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1837
Help on Locality: Locality: Mozambique. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition (Ytterbium, Columbium (former name for niobium)).
Help on Name Pronunciation: Name Pronunciation: Yttrocolumbite-(Y) + Pronunciation Say YTTROCOLUMBITE-(Y)
 

Yttrocolumbite-(Y) Crystallography

Help on Crystal System: Crystal System: Orthorhombic Space Group: Unk
 

Physical Properties of Yttrocolumbite-(Y)

Help on Color: Color: Black.
Help on Density: Density: 5.7 - 6.15, Average = 5.92
Help on Diaphaneity: Diaphaneity: Subtranslucent to Opaque
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: brown
 

Optical Properties of Yttrocolumbite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
KPDmeas= 0.1941,KC= 0.1889
Ncalc = 2.08 - 2.16
Help on Optical Data: Optical Data: Biaxial (+), b=2.15
 

Calculated Properties of Yttrocolumbite-(Y)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=5.22 gm/cc
note: Specific Gravity of Yttrocolumbite-(Y) =5.93 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0024748884
Boson Index = 0.9975251116
Help on Photoelectric: Photoelectric: PEYttrocolumbite-(Y) = 655.36 barns/electron
U=PEYttrocolumbite-(Y) x relectron=3,419.37 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 1,204,681.73 (Gamma Ray American Petroleum Institute Units)
Concentration of Yttrocolumbite-(Y) per GRapi unit = 830.09 (PPB)

Yttrocolumbite-(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) 25.25 ± 6.31 grams of pure Yttrocolumbite-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 2524.9 ±631.22 grams of pure Yttrocolumbite-(Y) .

Estimated Radioactivity from Yttrocolumbite-(Y) - very 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 / 6.86 cm 28,728,674 7.76E-04 1,204,681.73 396.06
100 gm / 3.18 cm 2,872,867 7.76E-05 120,468.17 39.61
10 gm / 1.48 cm 287,287 7.76E-06 12,046.82 3.96
1 gm / 6.86 mm 28,729 7.76E-07 1,204.68 0.40
0.1 gm / 3.18 mm 2,873 7.76E-08 120.47 0.04
0.01 gm / 1.48 mm 287 7.76E-09 12.05 0.00
0.001 gm / 0.69 mm 29 7.76E-10 1.20 0.00

Weight of pure Yttrocolumbite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.93 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
 

Yttrocolumbite-(Y) Classification

Help on  Dana Class: Dana Class: 08.01.03.02 (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.DB.25 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.D - Metal:Oxygen = 1:2 and similar
  04.DB -With medium-sized cations; chains of edge-sharing octahedra
 
04.DB.25 Ixiolite (Ta,Nb,Sn,Mn,Fe)O2 P 2/c 2/m
 
04.DB.25 Ishikawaite (U,Fe,Y,Ca)(Nb,Ta)O4(?) Unk Ortho
 
04.DB.25 Srilankite (Ti,Zr)O2 P bcn 2/m 2/m 2/m
 
04.DB.25 Samarskite-(Y) (Y,Fe,U)(Nb,Ta)5O4 P bcn 2/m 2/m 2/m
 
04.DB.25 Samarskite-(Yb)! (Yb,Y,REE,U,Th,Ca,Fe)(Nb,Ta,Ti)O4 P 2/c 2/m
 
04.DB.25 Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 Unk Ortho
 

Other Yttrocolumbite-(Y) 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 Yttrocolumbite-(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 Yttrocolumbite-(Y) Specimen Label here :

Yttrocolumbite-(Y)

(Y,U,Fe++)(Nb,Ta)O4
Dana No: 08.01.03.02 Strunz No: 04.DB.25
Locality:

 

Notes:

 

 
   
 


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