Yttropyrochlore-(Y) Mineral Data + Say YTTROPYROCHLORE-(Y)

General Yttropyrochlore-(Y) Information
Help on Chemical Formula: Chemical Formula: (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7
Help on Composition: Composition: Molecular Weight = 455.99 gm
   Sodium     1.01 %  Na    1.36 % Na2O
   Calcium    1.76 %  Ca    2.46 % CaO
   Yttrium   13.65 %  Y    17.33 % Y2O3
   Uranium   10.44 %  U    11.84 % UO2
   Tantalum  19.84 %  Ta   24.23 % Ta2O5
   Titanium   2.10 %  Ti    3.50 % TiO2
   Niobium   24.45 %  Nb   34.98 % Nb2O5
   Iron       1.22 %  Fe    1.75 % Fe2O3
   Hydrogen   0.62 %  H     5.53 % H2O
   Oxygen    24.91 %  O
            ______        ______ 
            100.00 %      102.98 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Y0.7Na0.2Ca0.2U0.2Nb1.2Ta0.5Ti0.2Fe3+0.1O5.4(OH)0.6·1.1(H2O)
Help on Environment: Environment: Replacement zones in a pegmatite.
Help on IMA Status: IMA Status: Approved IMA 1977
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 member ot the pyrochlore group.
Help on Synonym: Synonym: Obruchevite
 

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Yttropyrochlore-(Y) Crystallography
Help on Cell Dimensions: Cell Dimensions: a = 10.2, Z = 6; V = 1,061.21 Den(Calc)= 4.28
Help on Crystal System: Crystal System: Isometric - DiploidalH-M Symbol (2/m 3) Space Group: F d3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.95(1), 3.02(1), 3.09(0.25),
 

Physical Properties of Yttropyrochlore-(Y)

Help on Cleavage: Cleavage: None
Help on Color: Color: Dark brown, Black.
Help on Density: Density: 3.6 - 3.8, Average = 3.7
Help on Diaphaniety: Diaphaniety: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.
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: 4.5-5.5 - Near Apatite
Help on Luminescence: Luminescence: Radioactive.
Help on Luster: Luster: Resinous
Help on Streak: Streak: light brown
 

Optical Properties of Yttropyrochlore-(Y)

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.106 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1945,KPDmeas= 0.225,KC= 0.2175
Help on Optical Data: Optical Data: Isotropic, n=1.83-1.835.
 

Calculated Properties of Yttropyrochlore-(Y)

Help on Electron Density: Electron Density:

relectron=3.31 gm/cc
note: rYttropyrochlore-(Y) =3.70 gm/cc.
Help on Fermion Index Fermion Index Fermion Index = 0.00389
Boson Index = 0.99611
Help on Photoelectric: Photoelectric:

PEYttropyrochlore-(Y) = 550.09 barns/electron
U=PEYttropyrochlore-(Y) x relectron=1,822.89 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 797,004.66 (Gamma Ray American Petroleum Institute Units)

Yttropyrochlore-(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) 38.16 ± 9.54 grams of pure Yttropyrochlore-(Y) .
Estimated Maximum U.S. Postal Shipping Size (10 mRem/hr limit, Unshielded 100 cm box) 3816.4 ±954.09 grams of pure Yttropyrochlore-(Y) .

Estimated Radioactivity from Yttropyrochlore-(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 / 8.02 cm 18,687,600 5.05E-04 797,004.66 262.03
100 gm / 3.72 cm 1,868,760 5.05E-05 79,700.47 26.20
10 gm / 1.73 cm 186,876 5.05E-06 7,970.05 2.62
1 gm / 8.02 mm 18,688 5.05E-07 797.00 0.26
0.1 gm / 3.72 mm 1,869 5.05E-08 79.70 0.03
0.01 gm / 1.73 mm 187 5.05E-09 7.97 0.00
0.001 gm / 0.80 mm 19 5.05E-10 0.80 0.00

Weight of pure Yttropyrochlore-(Y) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.70 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
 

Yttropyrochlore-(Y) Classification
Help on Dana Class: Dana Class: 8.2.1.4 (8)Multiple Oxides with Nb, Ta, and Ti
  (8.2)where (A)2 (B2O6) (O,OH,F)
  (8.2.1)Pyrochlore Group (Pyrochlore Subgroup; Nb>Ta;(Nb+Ta)>2(Ti)
 
8.2.1.1 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.1.2 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m
 
8.2.1.3 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m
 
8.2.1.4 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3
 
8.2.1.5 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.1.6 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m
 
8.2.1.7 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
8.2.1.8 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m
 
8.2.1.9 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m
Help on Strunz Class: Strunz Class: IV/C.17-60 IV - Oxides
  IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)
  IV/C.17 - Pyrochlore group, Pyrochlore series with Nb > Ti
 
IV/C.17-10 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m
 
IV/C.17-20 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.17-30 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6·(H2O,K) F d3m 4/m 3 2/m
 
IV/C.17-40 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.17-50 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m
 
IV/C.17-60 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3
 
IV/C.17-70 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 
IV/C.17-80 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m
 
IV/C.17-85 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)·n(H2O) F d3m 4/m 3 2/m
 
IV/C.17-90 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m
 

Other Yttropyrochlore-(Y) Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3) OPTIC PROP.(AntBidBlaNic3)
Help on See Also: See Also: Links to other databases for Yttropyrochlore-(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 Yttropyrochlore-(Y) Specimen Label here :

Yttropyrochlore-(Y)

(Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7
Dana No: 8.2.1.4 Strunz No: IV/C.17-60
Locality:

 

Notes:

 
 
   
 
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