Euxenite-(Y) Mineral Data + Say EUXENITE-(Y)


[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts]
See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM]
Mineral News was founded some twenty years ago and has developed a following of
avid mineral collectors seeking timely information about new finds and other items
of interest to the collector community. Articles are solicited from collector and scientific authors.

General Euxenite-(Y) Information

Help on Chemical  Formula: Chemical Formula: (Y,Ca,Ce)(Nb,Ta,Ti)2O6
Help on Composition: Composition: Molecular Weight = 392.28 gm
   Calcium    2.04 %  Ca    2.86 % CaO
   Cerium     3.57 %  Ce    4.18 % Ce2O3
   Yttrium   15.86 %  Y    20.15 % Y2O3
   Tantalum  18.45 %  Ta   22.53 % Ta2O5
   Titanium   2.44 %  Ti    4.07 % TiO2
   Niobium   33.16 %  Nb   47.43 % Nb2O5
   Oxygen    24.47 %  O
            ______        ______ 
            100.00 %      101.22 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.7Ca0.2Ce0.12(Ta0.2)2(Nb0.7)2(Ti0.1)O6
Help on Environment: Environment: Granite pegmatites and a component of detrital black sands.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1870
Help on Locality: Locality: Jolster, Sondfjord, Norway. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek for "friendly to strangers, hospitable," in allusion to the rare elements that it contains.
Help on Synonym: Synonym: ICSD 100175
  PDF 14-463
 

Euxenite-(Y) Image

Click Here for Larger Euxenite-(Y) Image in a New Browser Window Images:
Click Here for Larger Euxenite-(Y) Image

Euxenite-(Y)

Comments: Crystal of euxenite-(Y) in matrix.
Location: Trout Creek Pass, Chaffee County, Colorado, USA. Scale: Crystal size 1.5 cm.
© John Veevaert

Euxenite-(Y) Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.3788:1:0.3545
Help on Cell Dimensions: Cell Dimensions: a = 5.52, b = 14.57, c = 5.166, Z = 3; V = 415.48 Den(Calc)= 4.70
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcan
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.99(1), 2.95(0.4), 3.66(0.4),
 

Physical Properties of Euxenite-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Brownish black, Brown, Yellow, Olive green.
Help on Density: Density: 4.7 - 5, Average = 4.84
Help on Diaphaniety: Diaphaniety: Translucent to opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Metamict - Mineral originally crystalline, now amorphous due to radiation damage.
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Greasy (Oily)
Help on Streak: Streak: reddish brown
 

Optical Properties of Euxenite-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.061 (Fair) - where the CI = (1-KPDmeas/KC)
CI calc= -0.095 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2447,KPDmeas= 0.2371,KC= 0.2234
Help on Optical Data: Optical Data: Isotropic, n=2.06-2.24.
Help on Reflectivity Reflectivity
Standardized Intensity (100%) Reflection Spectra of Euxenite-(Y) in Air
λ R1 R2  ∑ R1(λ)   ∑ R2(λ) 
 470 nm   13.70   15.60 
   
 546 nm   13.00   15.60 
 589 nm   12.50   15.00 
 650 nm   12.40   15.00 
Calculated Relative Intensity Colors of Euxenite-(Y) in Air
Relative
Intensity
   0%   70% 100% 140% 210% 280% 350% 420% 490% 560% 630% 700%
R1                        
R2                        
 

Calculated Properties of Euxenite-(Y)

Help on Electron Density: Electron Density:

relectron=4.35 gm/cc
note: rEuxenite-(Y) =4.85 gm/cc.

Help on Fermion Index Fermion Index Fermion Index = 0.00332
Boson Index = 0.99668
Help on Photoelectric: Photoelectric:

PEEuxenite-(Y) = 303.63 barns/electron
U=PEEuxenite-(Y) x relectron=1,322.15 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 3,420.62 (Gamma Ray American Petroleum Institute Units)

Euxenite-(Y) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

Estimated Radioactivity from Euxenite-(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 / 7.33 cm 80,008 2.16E-06 3,420.62 1.12
100 gm / 3.40 cm 8,001 2.16E-07 342.06 0.11
10 gm / 1.58 cm 800 2.16E-08 34.21 0.01
1 gm / 7.33 mm 80 2.16E-09 3.42 0.00
0.1 gm / 3.40 mm 8 2.16E-10 0.34 0.00
0.01 gm / 1.58 mm 1 2.16E-11 0.03 0.00
0.001 gm / 0.73 mm 0 2.16E-12 0.00 0.00

Weight of pure Euxenite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.85 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 ( 0.18 % Th) From Sum REE Elements ( 3.57 % REE)
 

Euxenite-(Y) Classification

Help on  Dana Class: Dana Class: 8.3.8.2 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.3)where A (B2O6)
  (8.3.8)Dana Group
 
8.3.8.1 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m
 
8.3.8.2 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m
 
8.3.8.3 Tanteuxenite-(Y) (Y,Ce,Ca)(Ta,Nb,Ti)2(O,OH)6 Pcan 2/m 2/m 2/m
 
8.3.8.4 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho
 
8.3.8.5 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: IV/D.19-40 IV - Oxides
  IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)
  IV/D.19 - Polycrase-(Y) - Loranskite-(Y) series
 
IV/D.19-10 Polycrase-(Y) (Y,Ca,Ce,U,Th)(Ti,Nb,Ta)2O6 Pcan 2/m 2/m 2/m
 
IV/D.19-15 Uranopolycrase (U,Y)(Ti,Nb,Ta)2O6 P bcn 2/m 2/m 2/m
 
IV/D.19-20 Yttrocrasite-(Y) (Y,Th,Ca,U)(Ti,Fe)2(O,OH)6 Unk Ortho
 
IV/D.19-30 Fersmite (Ca,Ce,Na)(Nb,Ta,Ti)2(O,OH,F)6 Pcan 2/m 2/m 2/m
 
IV/D.19-40 Euxenite-(Y) (Y,Ca,Ce)(Nb,Ta,Ti)2O6 Pcan 2/m 2/m 2/m
 
IV/D.19-60 Samarskite-(Y) (Y,Fe,U)(Nb,Ta)5O4 P bcn 2/m 2/m 2/m
 
IV/D.19-70 Ishikawaite (U,Fe,Y,Ca)(Nb,Ta)O4(?) Unk Ortho
 
IV/D.19-80 Yttrocolumbite-(Y) (Y,U,Fe)(Nb,Ta)O4 Unk Ortho
 
IV/D.19-90 Yttrotantalite-(Y) (Y,U,Fe)(Ta,Nb)O4 I2/a 2/m
 
IV/D.19-100 Loranskite-(Y) (Y,Ce,Ca)ZrTaO6(?) Unk Ortho
 

Other Euxenite-(Y) Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Euxenite-(Y) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST

Search for Euxenite-(Y) using:

Google
 
Web webmineral.com
[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Euxenite-(Y) :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Euxenite-(Y) Mineral Data :

Ask about Euxenite-(Y) here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

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

Euxenite-(Y)

(Y,Ca,Ce)(Nb,Ta,Ti)2O6
Dana No: 8.3.8.2 Strunz No: IV/D.19-40
Locality:

 

Notes:

 

 
   
 
Go To Webmineral Home Crystallography X-Ray D-Spacing Table Chemical Composition
Dana Classification Strunz Classification Table of Mineral Properties Alphabetical Listing of Minerals
Search Webmineral Photo Gallery of Mineral Images Help Files Links