Yttrobetafite-(Y) Mineral Data + Say YTTROBETAFITE-(Y)


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General Yttrobetafite-(Y) Information
Help on Chemical Formula: Chemical Formula: (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH)
Help on Composition: Composition: Molecular Weight = 437.15 gm
   Calcium    5.50 %  Ca    7.70 % CaO
   Cerium     9.62 %  Ce   11.26 % Ce2O3
   Yttrium    8.14 %  Y    10.33 % Y2O3
   Thorium    5.31 %  Th    6.04 % ThO2
   Uranium    5.45 %  U     6.18 % UO2
   Tantalum   0.83 %  Ta    1.01 % Ta2O5
   Titanium  13.14 %  Ti   21.93 % TiO2
   Niobium   12.75 %  Nb   18.24 % Nb2O5
   Iron       5.11 %  Fe    4.93 % FeO /  1.83 % Fe2O3
   Hydrogen   0.16 %  H     1.44 % H2O
   Lead       9.48 %  Pb   10.21 % PbO
   Oxygen    24.52 %  O
            ______        ______ 
            100.00 %      101.10 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.6Y0.4Ce0.3Fe2+0.3Pb0.2Th0.1U0.1Ti1.2Nb0.6Ta0.02Fe3+0.1O6(OH)0.7
Help on Environment: Environment: Replacement bodies in a quartz-plagioclase-microcline pegmatite and a constituent of lunar soils and breccias.
Help on IMA Status: IMA Status: Approved IMA 1962
Help on Locality: Locality: Alakurtti, northwestern Karelia, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the YTTRium-dominent betafite member of the pyrochlore group.
Help on Synonym: Synonym: ICSD 24206
  PDF 42-413
 

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Yttrobetafite-(Y) Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.35, Z = 8; V = 1,108.72 Den(Calc)= 5.24
Help on Crystal System: Crystal System: Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 1.694(1), 3.258(0.8), 2.985(0.7),1.18(0.6), 2.501(0.6), 1.104(0.3), 1.631(0.3),
 

Physical Properties of Yttrobetafite-(Y)

Help on Color: Color: Greenish, Gray green, Reddish.
Help on Density: Density: 3.65 - 4.9, Average = 4.27
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 4.5-5.5 - Near Apatite
Help on Luminescence: Luminescence: Radioactive.
Help on Luster: Luster: Greasy (Oily)
 

Optical Properties of Yttrobetafite-(Y)

Help on Optical Data: Optical Data: NCalc= 2.19 - from Gladstone-Dale relationship (KC = 0.227) where Ncalc=Dcalc*KC+1
NCalc= 1.97 - from Gladstone-Dale relationship (KC = 0.227) where Ncalc=Dmeas*KC+1
 

Calculated Properties of Yttrobetafite-(Y)

Help on Electron Density: Electron Density:

relectron=4.72 gm/cc
note: rYttrobetafite-(Y) =5.24 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.03961
Boson Index = 0.96039
Help on Photoelectric: Photoelectric:

PEYttrobetafite-(Y) = 517.04 barns/electron
U=PEYttrobetafite-(Y) x relectron=2,438.91 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 519,736.57 (Gamma Ray American Petroleum Institute Units)

Yttrobetafite-(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) 58.52 ± 14.63 grams of pure Yttrobetafite-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 5852.3 ±1463.1 grams of pure Yttrobetafite-(Y) .

Estimated Radioactivity from Yttrobetafite-(Y) - 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 / 7.14 cm 12,124,561 3.28E-04 519,736.57 170.87
100 gm / 3.32 cm 1,212,456 3.28E-05 51,973.66 17.09
10 gm / 1.54 cm 121,246 3.28E-06 5,197.37 1.71
1 gm / 7.14 mm 12,125 3.28E-07 519.74 0.17
0.1 gm / 3.32 mm 1,212 3.28E-08 51.97 0.02
0.01 gm / 1.54 mm 121 3.28E-09 5.20 0.00
0.001 gm / 0.71 mm 12 3.28E-10 0.52 0.00

Weight of pure Yttrobetafite-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 5.24 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
 

Yttrobetafite-(Y) Classification
Help on Dana Class: Dana Class: 8.2.3.2 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.2)where (A)2 (B2O6) (O,OH,F)
  (8.2.3)Pyrochlore Group (Betafite Subgroup; 2(Ti)>(Ta+Nb)
 
8.2.3.1 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
8.2.3.2 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
8.2.3.3 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.3.4 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
 
8.2.3.5 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: IV/C.16-30 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.16 - Pyrochlore group, Betafite series with Ti > (Nb,Ta)
 
IV/C.16-10 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
IV/C.16-20 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.16-30 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m
 
IV/C.16-40 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m
 

Other Yttrobetafite-(Y) Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Yttrobetafite-(Y) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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

Yttrobetafite-(Y)

(Y,U,Ce)2(Ti,Nb,Ta)2O6(OH)
Dana No: 8.2.3.2 Strunz No: IV/C.16-30
Locality:

 

Notes:

 
 
   
 
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