Stibiocolumbite Mineral Data

General Stibiocolumbite Information

Chemical Formula:

SbNbO4

Composition:

Molecular Weight = 278.65 gm

Niobium 33.34 % Nb 47.70 % Nb₂O₅

Antimony 43.69 % Sb 55.18 % SbO₂

Oxygen 22.97 % O

______ ______

100.00 % 102.87 % = TOTAL OXIDE

Empirical Formula:

SbNbO₄

Environment:

Accessory mineral in complex granite pegmatites.

IMA Status:

Valid Species (Pre-IMA) 1915

Locality:

Mesa Grande district, San Diego Co., California, USA. Link to MinDat.org Location Data.

Name Origin:

Named from the Latin for antimony, STIBium, in its composition, and relation to columbite.

Name Pronunciation:

Stibiocolumbite + Pronunciation

Synonym:

ICSD 20344

PDF 16-907

Stibiocolumbite Crystallography

Axial Ratios:

a:b:c =0.4178:1:0.4712

Cell Dimensions:

a = 4.929, b = 11.797, c = 5.559, Z = 4; V = 323.24 Den(Calc)= 5.73

Crystal System:

Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Pc21n

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

By Intensity(I/I_o): 3.13(1), 2.947(0.3), 1.735(0.2),

Physical Properties of Stibiocolumbite

Cleavage:

{010} Indistinct, {100} Indistinct

Color:

Brown, Brownish yellow, Greenish yellow, Reddish brown.

Density:

5.98

Diaphaneity:

Transparent to Translucent

Fracture:

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

Hardness:

5.5 - Knife Blade

Luster:

Adamantine - Resinous

Streak:

brownish yellow

Optical Properties of Stibiocolumbite

Gladstone-Dale:

CI meas= -0.864 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.946 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2487,KPDmeas= 0.2383,KC= 0.1278
Ncalc = 1.73 - 1.76

Optical Data:

Biaxial (+), a=2.3977, b=2.419, g=2.4588, bire=0.0611, 2V(Calc)=74, 2V(Meas)=73.417.

Calculated Properties of Stibiocolumbite

Electron Density:

Bulk Density (Electron Density)=5.32 gm/cc
note: Specific Gravity of Stibiocolumbite =5.98 gm/cc.

Fermion Index:

Fermion Index = 0.0001102401
Boson Index = 0.9998897599

Photoelectric:

PE_{Stibiocolumbite}= 197.32 barns/electron
U=PE_{Stibiocolumbite} x rElectron Density=1,050.19 barns/cc.

Radioactivity:

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

Stibiocolumbite Classification

Dana Class:

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

(08.01)where A BO4

(08.01.06)Stibiocolumbite Group

08.01.06.01 Stibiocolumbite SbNbO4 Pc21n mm2

08.01.06.02 Stibiotantalite SbTaO4 Pc21n mm2

08.01.06.03 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m

08.01.06.04 Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m

Strunz Class:

04.DE.30 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

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

04.DE -With medium-sized cations; with various polyhedra

04.DE.30 Cervantite SbSbO4 Pbn21 mm2

04.DE.30 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m

04.DE.30 Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m

04.DE.30 Clinocervantite! SbSbO4 C 2/c 2/m

04.DE.30 Stibiocolumbite SbNbO4 Pc21n mm2

04.DE.30 Stibiotantalite SbTaO4 Pc21n mm2

Other Stibiocolumbite Information

References:

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

See Also:

Links to other databases for Stibiocolumbite :
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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Stibiocolumbite

SbNbO4
Dana No: 08.01.06.01 Strunz No: 04.DE.30
Locality:

Notes:

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