Stibiocolumbite
A valid IMA mineral species - grandfathered
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About Stibiocolumbite
Formula:
Sb(Nb,Ta)O4
Colour:
Dark brown to light yellowish brown; reddish yellow, reddish brown, greenish yellow
Lustre:
Adamantine, Resinous
Hardness:
5½
Specific Gravity:
5.68
Crystal System:
Orthorhombic
Member of:
Name:
The name reflects its antimony (Greek "stibi") content and similarity to columbite.
This page provides mineralogical data about Stibiocolumbite.
Unique Identifiers
Mindat ID:
3778
Long-form identifier:
mindat:1:1:3778:1
IMA Classification of Stibiocolumbite
Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
SbNbO4
Type description reference:
Classification of Stibiocolumbite
4.DE.30
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
E : With medium-sized cations; with various polyhedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
D : Metal: Oxygen = 1:2 and similar
E : With medium-sized cations; with various polyhedra
8.1.6.1
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
18.1.27
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Sclb | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Stibiocolumbite
Adamantine, Resinous
Transparency:
Translucent
Colour:
Dark brown to light yellowish brown; reddish yellow, reddish brown, greenish yellow
Streak:
Light yellow, yellow-brown
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
{010} distinct; {100} indistinct
{010} distinct; {100} indistinct
Fracture:
Sub-Conchoidal
Density:
5.68 g/cm3 (Measured) 5.72 g/cm3 (Calculated)
Optical Data of Stibiocolumbite
Type:
Biaxial (+)
RI values:
nα = 2.398 nβ = 2.419 nγ = 2.459
2V:
Measured: 73° , Calculated: 74°
Max. Birefringence:
δ = 0.061
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
r < v
Chemistry of Stibiocolumbite
Mindat Formula:
Sb(Nb,Ta)O4
Element Weights:
Elements listed:
Common Impurities:
Ta
Crystallography of Stibiocolumbite
Crystal System:
Orthorhombic
Class (H-M):
mm2 - Pyramidal
Cell Parameters:
a = 4.929 Å, b = 11.797 Å, c = 5.559 Å
Ratio:
a:b:c = 0.418 : 1 : 0.471
Unit Cell V:
323.24 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Prismatic [001]. {010} and {110} striated parallel to [001]. The crystals infreqently exhibit morphological evidence of hemimorphism.
Twinning:
About [010] with composition plane {001}, commonly an irregular junction, or polysynthetic
Comment:
Space Group: P c21n (synthetic SbNbO4).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.125 Å | (100) |
| 2.947 Å | (28) |
| 1.735 Å | (21) |
| 3.517 Å | (18) |
| 1.891 Å | (12) |
| 2.779 Å | (10) |
| 2.023 Å | (10) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 34 : Complex granite pegmatites |
Type Occurrence of Stibiocolumbite
Place of Conservation of Type Material:
The type crystal was totally consumed during analysis before realization it was of a new species.
Associated Minerals at Type Locality:
Synonyms of Stibiocolumbite
Columbite-Tantalite (in part)
Other Language Names for Stibiocolumbite
Relationship of Stibiocolumbite to other Species
Member of:
Other Members of Cervantite Group:
| Bismutocolumbite | Bi(Nb,Ta)O4 | Orth. mmm (2/m 2/m 2/m) |
| Bismutotantalite | BiTaO4 | Orth. |
| Cervantite | Sb3+Sb5+O4 | Orth. mm2 |
| Clinocervantite | Sb3+Sb5+O4 | Mon. 2/m : B2/b |
| Stibiotantalite | Sb(Ta,Nb)O4 | Orth. mm2 |
Forms a series with:
Related Minerals - Strunz-mindat Grouping
| 4.DE. | Colchesterite | Bi3+2Mo6+2O9 |
| 4.DE. | Pertoldite | GeO2 |
| 4.DE. | Ziroite | ZrO2 |
| 4.DE.05 | Downeyite | SeO2 |
| 4.DE.10 | Koragoite | (Mn2+,Fe3+)3(Nb,Ta,Ti)2(Nb,Mn)2(W,Ta)2O20 |
| 4.DE.15 | Russellite | Bi2WO6 |
| 4.DE.15 | Koechlinite | Bi2MoO6 |
| 4.DE.15 | Tungstibite | Sb3+2WO6 |
| 4.DE.20 | Tellurite | TeO2 |
| 4.DE.25 | Paratellurite | TeO2 |
| 4.DE.30 | Bismutotantalite | BiTaO4 |
| 4.DE.30 | Stibiotantalite | Sb(Ta,Nb)O4 |
| 4.DE.30 | Cervantite | Sb3+Sb5+O4 |
| 4.DE.30 | Bismutocolumbite | Bi(Nb,Ta)O4 |
| 4.DE.30 | Clinocervantite | Sb3+Sb5+O4 |
| 4.DE.35 | Baddeleyite | ZrO2 |
| 4.DE.40 | Billwiseite | Sb3+5Nb3WO18 |
| 4.DE.45 | Kyawthuite | Bi3+Sb5+O4 |
Other Information
Electrical:
Strongly pyroelectric.
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
Internet Links for Stibiocolumbite
mindat.org URL:
https://www.mindat.org/min-3778.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Stibiocolumbite
Reference List:
Localities for Stibiocolumbite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Angola | |
| Gonçalves et al. (2019) |
| Gonçalves et al. (2019) | |
Canada | |
| Ercit et al. (2003) |
Italy | |
| Pezzotta +1 other reference |
Mozambique | |
| Wilson et al. (2000) |
Norway | |
| Ellingsen et al. (2000) +1 other reference |
Pakistan | |
| Scovill (2007) |
| imported from Rondu District +1 other reference | |
Poland | |
| Pieczka (2000) +7 other references |
| Pieczka et al. (2001) | |
Russia | |
| Igor.V. Pekov (2008) |
Switzerland | |
| Stalder et al. (1998) |
Tajikistan | |
| Pekov (1998) |
USA (TL) | |
| Fisher (2002) |
| Foord et al. (1989) |
| Eckel et al. (1997) |
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Quartzite quarries, Embd, Visp, Valais, Switzerland