Stibiocolumbite Mineral Data

Stibiocolumbite Mineral Data +

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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

IMA Status:

Valid Species (Pre-IMA) 1915

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 20344

PDF 16-907

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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 - PyramidalH-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),

Crystal Structure:

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Zubkova N V , Pushcharovskii D Y , Giester G , Smolin A S , Tillmanns E , Brandstatter F , Hammer V , Peretyazhko I S , Sapozhnikov A N , Kashaev A A , Neues Jahrbuch fur Mineralogie, Monatshefte , 2002 (2002) p.145-159, Bismutocolumbite, Bi(Nb.79Ta.21)O4, stibiocolumbite, Sb(Nb.67Ta.33)O4 and their, structural relation to the other ABO4 minerals with, stibiotantalite (SbTaO4) structure, Locality: Mesa Grande, California, USA

Physical Properties of Stibiocolumbite

Cleavage:

[010] Indistinct, [100] Indistinct

Color:

Brown, Brownish yellow, Greenish yellow, Reddish brown.

Density:

5.98

Diaphaniety:

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

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:

r_electron=5.32 gm/cc
note: r_{Stibiocolumbite}=5.98 gm/cc.

Fermion Index

Fermion Index = 0.00011
Boson Index = 0.99989

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Stibiocolumbite is Not Radioactive

Stibiocolumbite Classification

Dana Class:

8.1.6.1 (8)Multiple Oxides with Nb, Ta, and Ti

(8.1)where A BO4

(8.1.6)Dana Group

8.1.6.1 Stibiocolumbite SbNbO4 Pc21n mm2

8.1.6.2 Stibiotantalite SbTaO4 Pc21n mm2

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

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

Strunz Class:

IV/D.25-20 IV - Oxides

IV/D - Oxides with metal : oxygen = 1:2 (MO2 and related compounds)

IV/D.25 - Cervantite - Chiluite series

IV/D.25-05 Clinocervantite! SbSbO4 C 2/c 2/m

IV/D.25-10 Cervantite SbSbO4 Pbn21 mm2

IV/D.25-20 Stibiocolumbite SbNbO4 Pc21n mm2

IV/D.25-30 Stibiotantalite SbTaO4 Pc21n mm2

IV/D.25-35 Bismutocolumbite Bi(Nb,Ta)O4 Pcnn 2/m 2/m 2/m

IV/D.25-40 Bismutotantalite Bi(Ta,Nb)O4 Pcmn 2/m 2/m 2/m

IV/D.25-70 Chiluite Bi6Te2Mo2O21 P 6₃22, P 6₃/m, P 6₃ Hex

Other Stibiocolumbite Information

References:

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 -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 -École des Mines de Paris

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Print or Cut-and-Paste your Stibiocolumbite Specimen Label here :

Stibiocolumbite

SbNbO4
Dana No: 8.1.6.1 Strunz No: IV/D.25-20
Locality:

Notes: