Stibiobetafite Mineral Data

General Stibiobetafite Information

Chemical Formula:

(Sb+++,Ca)2(Ti,Nb,Ta)2(O,OH)7

Composition:

Molecular Weight = 433.88 gm

Calcium 10.16 % Ca 14.22 % CaO

Tantalum 16.68 % Ta 20.37 % Ta₂O₅

Titanium 9.93 % Ti 16.57 % TiO₂

Niobium 14.99 % Nb 21.44 % Nb₂O₅

Tin 2.74 % Sn 3.47 % SnO₂

Antimony 19.64 % Sb 23.51 % Sb₂O₃

Hydrogen 0.05 % H 0.42 % H₂O

Oxygen 25.81 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca_1.1Sb_0.7Sn_0.1Ti_0.9Nb_0.7Ta_0.4O_6.8(OH)_0.2

Environment:

Replacement masses and in veinlets, in a granite pegmatite in a serpentinite.

IMA Status:

Approved IMA 1979

Locality:

Vezna, Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named for antimony (STIBium) in its composition and membership in the betafite subgroup of the pyrochlore group.

Name Pronunciation:

Stibiobetafite + Pronunciation

Stibiobetafite Crystallography

Cell Dimensions:

a = 10.356, Z = 8; V = 1,110.65 Den(Calc)= 5.19

Crystal System:

Isometric - Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.989(1), 1.561(0.4), 1.83(0.4),

Physical Properties of Stibiobetafite

Cleavage:

None

Color:

Dark brown, Black brown.

Density:

5.3

Diaphaneity:

Translucent to Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Habit:

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

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

brownish white

Optical Properties of Stibiobetafite

Gladstone-Dale:

CI meas= 0.38 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.367 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1503,KPDmeas= 0.1472,KC= 0.2373
Ncalc = 2.23 - 2.26

Optical Data:

Isotropic, n=1.78.

Calculated Properties of Stibiobetafite

Electron Density:

Bulk Density (Electron Density)=4.70 gm/cc
note: Specific Gravity of Stibiobetafite =5.19 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Stibiobetafite}= 288.11 barns/electron
U=PE_{Stibiobetafite} x rElectron Density=1,355.08 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stibiobetafite is Not Radioactive

Stibiobetafite Classification

Dana Class:

08.02.03.04 (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 (ï¿½ 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 Stibiobetafite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic3)

See Also:

Links to other databases for Stibiobetafite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Stibiobetafite

(Sb+++,Ca)2(Ti,Nb,Ta)2(O,OH)7
Dana No: 08.02.03.04 Strunz No: 04.DH.15
Locality:

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