Yttrobetafite-(Y) Mineral Data

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General Yttrobetafite-(Y) Information

Chemical Formula:

(Y,U,Ce)2(Ti,Nb,Ta)2O6(OH)

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

Empirical Formula:

Ca_0.6Y_0.4Ce_0.3Fe²⁺_0.3Pb_0.2Th_0.1U_0.1Ti_1.2Nb_0.6Ta_0.02Fe³⁺_0.1O₆(OH)_0.7

Environment:

Replacement bodies in a quartz-plagioclase-microcline pegmatite and a constituent of lunar soils and breccias.

IMA Status:

Approved IMA 1962

Locality:

Alakurtti, northwestern Karelia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the YTTRium-dominent betafite member of the pyrochlore group.

Name Pronunciation:

Yttrobetafite-(Y) + Pronunciation

Synonym:

ICSD 24206

PDF 42-413

Yttrobetafite-(Y) Image

Images:

Yttrobetafite-(Y)

Comments: Fragment of the large grain of compact mustard-yellow yttrobetafite-(Y) from the type locality. Associated minerals are black biotite and redish-brown veinlets of gummite.
Location: Alakurtti pegmatite, Northern Karelia, Murmanskaja Oblast', Northern Region, Russia. Scale: Specimen size is 4.5x2.8x1.4 cm.
© Pavel M. Kartashov

Yttrobetafite-(Y) Crystallography

Cell Dimensions:

a = 10.35, Z = 8; V = 1,108.72 Den(Calc)= 5.24

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/I_o): 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)

Color:

Greenish, Gray green, Reddish.

Density:

3.65 - 4.9, Average = 4.27

Diaphaneity:

Translucent to Opaque

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

4.5-5.5 - Near Apatite

Luminescence:

Radioactive.

Luster:

Greasy (Oily)

Optical Properties of Yttrobetafite-(Y)

Optical Data:

NCalc= 2.24 - from Gladstone-Dale relationship (KC = 0.2363) where Ncalc=Dcalc*KC+1
NCalc= 2.01 - from Gladstone-Dale relationship (KC = 0.2363) where Ncalc=Dmeas*KC+1

Calculated Properties of Yttrobetafite-(Y)

Electron Density:

Bulk Density (Electron Density)=4.72 gm/cc
note: Specific Gravity of Yttrobetafite-(Y) =5.24 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Yttrobetafite-(Y)}= 517.04 barns/electron
U=PE_{Yttrobetafite-(Y)} x r_electron=2,438.91 barns/cc.

Radioactivity:

GRapi = 519,737.20 (Gamma Ray American Petroleum Institute Units)
Concentration of Yttrobetafite-(Y) per GRapi unit =1,924.05 (PPB)

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 Becquerels (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	12,124,567	3.28E-04	519,737.20	170.87
100 gm / 3.32 cm	1,212,457	3.28E-05	51,973.72	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

Dana Class:

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

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

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

08.02.03.01 Betafite (Ca,U)2(Ti,Nb,Ta)2O6(OH) F d3m 4/m 3 2/m

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

08.02.03.03 Plumbobetafite (Pb,U,Ca)(Ti,Nb)2O6(OH,F) F d3m 4/m 3 2/m

08.02.03.04 Stibiobetafite (Sb,Ca)2(Ti,Nb,Ta)2(O,OH)7 F d3m 4/m 3 2/m

08.02.03.05 Calciobetafite Ca2(Ti,Nb)2(O,OH)7 F d3m 4/m 3 2/m

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 Yttrobetafite-(Y) Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Yttrobetafite-(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 Yttrobetafite-(Y) Specimen Label here :

Yttrobetafite-(Y)

(Y,U,Ce)2(Ti,Nb,Ta)2O6(OH)
Dana No: 08.02.03.02 Strunz No: 04.DH.15
Locality:

Notes: