Iwashiroite-(Y) Mineral Data

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General Iwashiroite-(Y) Information

Help on Chemical  Formula: Chemical Formula: YTaO4
Help on Composition: Composition: Molecular Weight = 333.85 gm
   Yttrium   26.63 %  Y    33.82 % Y2O3
   Tantalum  54.20 %  Ta   66.18 % Ta2O5
   Oxygen    19.17 %  O
            ______        ______ 
            100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: YTaO4
Help on Environment: Environment: Dimorphous with formanite
Help on IMA Status: IMA Status: Proposed IMA 2003 (Dana # Added)
Help on Locality: Locality: Suishouyama pegmatite, Kawamata town, Fukushima Prefecture, Tohoku Region, Honshu Island, Japan. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the old prefectural name of Fukushima prefecture (Iwashiro).
Help on Synonym: Synonym: IMA2003-053
 

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Iwashiroite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.9653:1:0.9374
Help on Cell Dimensions: Cell Dimensions: a = 5.262, b = 5.451, c = 5.11, Z = 2; beta = 95.12° V = 145.99 Den(Calc)= 7.59
Help on Crystal System: Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 2/a
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.13(1), 2.95(0.94), 1.862(0.29),1.89(0.29), 2.73(0.26), 2.62(0.23), 1.614(0.2),
 

Physical Properties of Iwashiroite-(Y)

Help on Color: Color: Amber brown, Brown.
Help on Diaphaniety: Diaphaniety: Translucent
Help on Luster: Luster: Vitreous - Adamantine
 

Optical Properties of Iwashiroite-(Y)

Help on Optical Data: Optical Data: NCalc= 2.19 - from Gladstone-Dale relationship (KC = 0.1574) where Ncalc=Dcalc*KC+1
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Iwashiroite-(Y) in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   13.80   14.10 
   
 546 nm   13.60   13.80 
 589 nm   13.60   13.90 
 650 nm   13.70   14.00 
Calculated Relative Intensity Colors of Iwashiroite-(Y) in Air
Relative
Intensity
   0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 650%
R1                        
R2                        
 

Calculated Properties of Iwashiroite-(Y)

Help on Electron Density: Electron Density:

relectron=6.55 gm/cc
note: rIwashiroite-(Y) =7.59 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00015
Boson Index = 0.99985
Help on Photoelectric: Photoelectric:

PEIwashiroite-(Y) = 683.22 barns/electron
U=PEIwashiroite-(Y) x relectron=4,473.42 barns/cc.

Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Iwashiroite-(Y) is Not Radioactive

 

Iwashiroite-(Y) Classification

Help on  Dana Class: Dana Class: 8.1.3.3 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.1)where A BO4
  (8.1.3)Dana Group
 
8.1.3.1 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m
 
8.1.3.2 Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 Unk Ortho
 
8.1.3.3 Iwashiroite-(Y) ! YTaO4 P 2/a 2/m
Help on  Strunz Class: Strunz Class: IV/X.00-00 IV - Oxides
  IV/X - Unclassified Strunz Oxides
  IV/X.00 - Oxide
 

Other Iwashiroite-(Y) Information

Help on See Also: See Also: Links to other databases for Iwashiroite-(Y) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Iwashiroite-(Y)

YTaO4
Dana No: 8.1.3.3 Strunz No: IV/X.00-00
Locality:

 

Notes:

 

 
   
 
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