Yttropyrochlore-(Y) Mineral Data (original) (raw)

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 Name Pronunciation: Name Pronunciation:

Yttropyrochlore-(Y) + Pronunciation Say YTTROPYROCHLORE-(Y)

Help on Synonym: Synonym:

Obruchevite

Yttropyrochlore-(Y) Image

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

Click Here for Larger Yttropyrochlore-(Y) Image Yttropyrochlore-(Y) Comments: Vitreous brown metamict yttropyrochlore-(Y). Location: Alakurtti pegmatite, North Karelia, Murmanskaja Oblast', Northern Region, Russia.Scale: See Image. © Rruff Database

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 Diaphaneity: Diaphaneity:

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
Ncalc = 1.78 - 1.93

Help on Optical Data: Optical Data:

Isotropic, n=1.83-1.835.

Calculated Properties of Yttropyrochlore-(Y)

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.31 gm/cc
note: Specific Gravity of Yttropyrochlore-(Y) =3.70 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0038947057
Boson Index = 0.9961052943

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 = 797,005.78 (Gamma Ray American Petroleum Institute Units)
Concentration of Yttropyrochlore-(Y) per GRapi unit =1,254.70 (PPB)

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

SpecimenSizeWeight/Volume(Sphere) * CalculatedActivityBecquerels(Bq) CalculatedActivityCuries (Ci) EstimatedActivityGR(api) EstimatedExposure(mRem**)/hrIf Held in HandFor One Hour
1000 gm / 8.02 cm 18,687,615 5.05E-04 797,005.78 262.03
100 gm / 3.72 cm 1,868,762 5.05E-05 79,700.58 26.20
10 gm / 1.73 cm 186,876 5.05E-06 7,970.06 2.62
1 gm / 8.02 mm 18,688 5.05E-07 797.01 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:

08.02.01.04 (08)Multiple Oxides with Nb, Ta, and Ti

(08.02)where (A)2 (B2O6) (O,OH,F)

(08.02.01)Pyrochlore Group (Pyrochlore Subgroup; Nb>Ta;(Nb+Ta)>2(Ti)

08.02.01.01 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m

08.02.01.02 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m

08.02.01.03 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m

08.02.01.04 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3

08.02.01.05 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

08.02.01.06 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m

08.02.01.07 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

08.02.01.08 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m

08.02.01.09 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:

04.DH.15 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DH -With large (� medium-sized) cations; sheets of edge-sharing octahedra

04.DH.15 Alumotungstite (W,Al)(O,OH)3(?) Unk Cubic

04.DH.15 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Ferritungstite (K,Ca,Na)(W,Fe)2(O,OH)6•(H2O) F d3m 4/m 3 2/m

04.DH.15 Cesstibtantite (Cs,Na)SbTa4O12 F d3m 4/m 3 2/m

04.DH.15 Bismutomicrolite (Bi,Ca)(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Ceriopyrochlore-(Ce) (Ce,Ca,Y)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Bariopyrochlore (Ba,Sr)(Nb,Ti)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Bariomicrolite Ba(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Jixianite Pb(W,Fe)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Plumbomicrolite (Pb,Ca,U)2Ta2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Kalipyrochlore (H2O,Sr)(Nb,Ti)(O,OH)6•(H2O,K) F d3m 4/m 3 2/m

04.DH.15 Plumbopyrochlore (Pb,Y,U,Ca)2-xNb2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Strontiopyrochlore* Sr2Nb2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Uranmicrolite (U,Ca)2(Ta,Nb)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Pyrochlore (Na,Ca)2Nb2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Microlite (Na,Ca)2Ta2O6(O,OH,F) F d3m 4/m 3 2/m

04.DH.15 Natrobistantite (Na,Cs)Bi(Ta,Nb,Sb)4O12 F d3m 4/m 3 2/m

04.DH.15 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Stibiomicrolite (Sb,Ca,Na)2(Ta,Nb)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Stannomicrolite (Sn,Fe,Mn)(Ta,Nb,Sn)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m

04.DH.15 Uranpyrochlore (U,Ca,Ce)2(Nb,Ta)2O6(OH,F) F d3m 4/m 3 2/m

04.DH.15 Bismutopyrochlore! (Bi,U,Ca,Pb)1x(Nb,Ta)2O6(OH)•n(H2O) F d3m 4/m 3 2/m

04.DH.15 Fluornatromicrolite! (Na,Ca,Bi)2Ta2O6F F d3m 4/m 3 2/m

04.DH.15 Yttrobetafite-(Y) (Y,U,Ce)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

04.DH.15 Yttropyrochlore-(Y) (Y,Na,Ca,U)1-2(Nb,Ta,Ti)2(O,OH)7 F d3m 2/m 3

04.DH.15 Elsmoreite! WO3•0.5(H2O) 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 - GeoScienceWorld
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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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: 08.02.01.04 Strunz No: 04.DH.15
Locality:

Notes: