Yttrobetafite-(Y) Mineral Data

[What's New] [Mineral Galleries] [About Us] [Contacts] [Login]
At AA Mineral Specimens, we source quality Mineral Specimens, Fossils, Gemstones,
Decorative Stones, Lapidary Material and Specimen Sets world-wide

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 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	12,124,567	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 - 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
12 - Ruff.Info

Search for Yttrobetafite-(Y) using:

[ALTAVISTA] [AOL] [All-The-Web] [HotBot] [Ixquick] [MAMMA] [MSN.COM] [Netscape] [Scirus] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Yttrobetafite-(Y) :

AA Mineral Specimens

B & L Fine Minerals

Crystalarium.com

Dan Weinrich Fine Minerals

Dan Weinrich Auctions

Dakota Matrix

Desert Winds Gems and Minerals

John Betts Fine Minerals

Mason's Minerals

Mineral News

Mineral of the Month Club

Wrights Rock Shop

Translate Yttrobetafite-(Y) Mineral Data :

Ask about Yttrobetafite-(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 Español

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: