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Samarskite-(Yb) Mineral Data

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General Samarskite-(Yb) Information

Help on Chemical  Formula: Chemical Formula: (Yb,Y,REE,U,Th,Ca,Fe++) (Nb,Ta,Ti)O4
Help on Composition: Composition: Molecular Weight = 312.29 gm
   Calcium         1.58 %  Ca    2.21 % CaO
   Lanthanum       0.04 %  La    0.05 % La2O3
   Cerium          0.18 %  Ce    0.21 % Ce2O3
   Praeseodymium   0.05 %  Pr    0.05 % Pr2O3
   Samarium        0.39 %  Sm    0.45 % Sm2O3
   Gadolinium      0.50 %  Gd    0.58 % Gd2O3
   Dysprosium      2.81 %  Dy    3.22 % Dy2O3
   Yttrium         1.59 %  Y     2.02 % Y2O3
   Holmium         0.53 %  Ho    0.60 % Ho2O3
   Erbium          3.11 %  Er    3.55 % Er2O3
   Thulium         0.54 %  Tm    0.62 % Tm2O3
   Lutetium        0.90 %  Lu    1.02 % Lu2O3
   Terbium         0.25 %  Tb    0.29 % Tb2O3
   Thorium         9.29 %  Th   10.57 % ThO2
   Ytterbium       5.32 %  Yb    6.06 % Yb2O3
   Zirconium       0.76 %  Zr    1.03 % ZrO2
   Scandium        0.17 %  Sc    0.26 % Sc2O3
   Uranium         9.60 %  U    10.89 % UO2
   Tantalum       12.98 %  Ta   15.85 % Ta2O5
   Titanium        0.41 %  Ti    0.69 % TiO2
   Manganese       0.83 %  Mn    1.07 % MnO
   Niobium        21.66 %  Nb   30.98 % Nb2O5
   Iron            2.07 %  Fe    2.67 % FeO
   Silicon         0.20 %  Si    0.42 % SiO2
   Tin             0.46 %  Sn    0.58 % SnO2
   Lead            0.27 %  Pb    0.29 % PbO
   Tungsten        2.47 %  W     3.12 % WO3
   Neodymium       0.55 %  Nd    0.65 % Nd2O3
   Oxygen         20.49 %  O
                 ______        ______ 
                 100.00 %      100.01 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Yb0.09Er0.05Y0.05Dy0.05Lu0.01Nd0.01Tm0.01Ho0.01Gd0.01Sm0.008Tb0.005Ce0.004Pr0.001La0.001U0.12 Th0.12Ca0.12Fe2+0.11Mn2+0.04O4
Help on Environment: Environment: Found as anhedral masses up to tens of centimeters across that are intimately intergrown with ferrocolumbite and zircon.
Help on IMA Status: IMA Status: Approved IMA 2004 (Dana # Added)
Help on Locality: Locality: Little Patsy pegmatite, Jefferson Co., Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Yb-dominant analogue of samarskite.
Help on Name Pronunciation: Name Pronunciation: Samarskite-(Yb) + Pronunciation Say SAMARSKITE-(YB)
Help on Synonym: Synonym: IMA2004-001
 

Samarskite-(Yb) Image

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  Samarskite-(Yb)

Comments: Black samarskite-(Yb) on matrix.
Location: 1.0 Ga Pikes Peak batholith, Little Patsy pegmatite, South Platte Pegmatite district, Jefferson County, Colorado, U.S.A.. Scale: See Image.
© Sarah L. Hansen

Samarskite-(Yb) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5736:1:0.5243
Help on Cell Dimensions: Cell Dimensions: a = 5.688, b = 9.915, c = 5.199, Z = 4; beta = 93.16° V = 292.76 Den(Calc)= 7.08
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.971(1), 3.07(0.25), 3.664(0.21),1.574(0.2), 1.87(0.2), 1.769(0.15),
 

Physical Properties of Samarskite-(Yb)

Help on Cleavage: Cleavage: None
Help on Color: Color: Black.
Help on Density: Density: 7.03
Help on Diaphaneity: Diaphaneity: Nearly opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Hardness: Hardness: 5-6 - Between Apatite and Orthoclase
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: brown black
 

Optical Properties of Samarskite-(Yb)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.143 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.149 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1554,KPDmeas= 0.1565,KC= 0.1826
Ncalc = 2.28 - 2.29
Help on Optical Data: Optical Data: Isotropic, n=2.1.
 

Calculated Properties of Samarskite-(Yb)

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=6.09 gm/cc
note: Specific Gravity of Samarskite-(Yb) =7.03 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.04
Boson Index = 0.96
Help on Photoelectric: Photoelectric: PESamarskite-(Yb) = 847.13 barns/electron
U=PESamarskite-(Yb) x relectron=5,162.49 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 881,414.11 (Gamma Ray American Petroleum Institute Units)
Concentration of Samarskite-(Yb) per GRapi unit =1,134.54 (PPB)

Samarskite-(Yb) 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) 34.51 ± 8.63 grams of pure Samarskite-(Yb) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 3450.9 ±862.72 grams of pure Samarskite-(Yb) .

Estimated Radioactivity from Samarskite-(Yb) - 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 / 6.48 cm 21,352,266 5.77E-04 881,414.11 289.78
100 gm / 3.01 cm 2,135,227 5.77E-05 88,141.41 28.98
10 gm / 1.40 cm 213,523 5.77E-06 8,814.14 2.90
1 gm / 6.48 mm 21,352 5.77E-07 881.41 0.29
0.1 gm / 3.01 mm 2,135 5.77E-08 88.14 0.03
0.01 gm / 1.40 mm 214 5.77E-09 8.81 0.00
0.001 gm / 0.65 mm 21 5.77E-10 0.88 0.00

Weight of pure Samarskite-(Yb) in grams (gm) and Calculated Diameter of a Sphere with a Density of 7.03 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
 

Samarskite-(Yb) Classification

Help on  Dana Class: Dana Class: 08.01.11.02 (08)Multiple Oxides with Nb, Ta, and Ti
  (08.01)where A BO4
  (08.01.11)Samarskite Group
 
08.01.11.01 Samarskite-(Y) (Y,Fe,U)(Nb,Ta)5O4 P bcn 2/m 2/m 2/m
 
08.01.11.02 Samarskite-(Yb)! (Yb,Y,REE,U,Th,Ca,Fe)(Nb,Ta,Ti)O4 P 2/c 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 Samarskite-(Yb) Information

Help on References: References: NAME( CanMin, v44:1119) PHYS. PROP.(CanMin, v44:1119) OPTIC PROP.(CanMin, v44:1119)
Help on See Also: See Also: Links to other databases for Samarskite-(Yb) :
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 Samarskite-(Yb) Specimen Label here :

Samarskite-(Yb)

(Yb,Y,REE,U,Th,Ca,Fe++) (Nb,Ta,Ti)O4
Dana No: 08.01.11.02 Strunz No: 04.DB.25
Locality:

 

Notes:

 

 
   
 


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