Bismutocolumbite
A valid IMA mineral species
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About Bismutocolumbite
Formula:
BiNbO4
Colour:
Black; brown in transmitted light
Lustre:
Sub-Metallic
Hardness:
5½
Specific Gravity:
7.17
Crystal System:
Orthorhombic
Member of:
Name:
For the bismuth in its composition and its relation to the minerals of the columbite-tantalite series.
This page provides mineralogical data about Bismutocolumbite.
Unique Identifiers
Mindat ID:
688
Long-form identifier:
mindat:1:1:688:8
IMA Classification of Bismutocolumbite
Approved
IMA Formula:
Bi3+Nb5+O4
Approval year:
1991
First published:
1992
Classification of Bismutocolumbite
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
8.1.6.4
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
8 : MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
1 : ABO4
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 for Standard |
|---|---|---|
| Bclb | 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 Bismutocolumbite
Sub-Metallic
Transparency:
Transparent
Colour:
Black; brown in transmitted light
Streak:
Brown to pale yellow
Hardness:
5½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
on {010}
on {010}
Fracture:
Conchoidal
Density:
7.17 g/cm3 (Measured) 7.66 g/cm3 (Calculated)
Optical Data of Bismutocolumbite
Type:
Biaxial (+)
RI values:
nα = 2.38 nβ = 2.42 nγ = 2.47
2V:
Calculated: 85°
Max. Birefringence:
δ = 0.090
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
Relatively strong
Chemistry of Bismutocolumbite
Mindat Formula:
BiNbO4
Element Weights:
Elements listed:
Common Impurities:
Ta,Pb,Sb,Sn,Ti
Crystallography of Bismutocolumbite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Cell Parameters:
a = 4.992 Å, b = 5.677 Å, c = 11.731 Å
Ratio:
a:b:c = 0.879 : 1 : 2.066
Unit Cell V:
332.45 ų (Calculated from Unit Cell)
Z:
4
Comment:
Space Group: Pcnn
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 3.164 Å | (100) |
| 2.934 Å | (90) |
| 1.734 Å | (80) |
| 2.842 Å | (45) |
| 2.495 Å | (45) |
| 1.769 Å | (45) |
| 1.899 Å | (40) |
Comments:
Recorded on type material
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 Bismutocolumbite
General Appearance of Type Material:
Prismatic crystals to 2 mm, striated parallel to their elongation
Place of Conservation of Type Material:
A. E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia
Geological Setting of Type Material:
In a pegmatite
Associated Minerals at Type Locality:
Synonyms of Bismutocolumbite
Other Language Names for Bismutocolumbite
Relationship of Bismutocolumbite to other Species
Member of:
Other Members of Cervantite Group:
| Bismutotantalite | BiTaO4 | Orth. |
| Cervantite | Sb3+Sb5+O4 | Orth. mm2 |
| Clinocervantite | Sb3+Sb5+O4 | Mon. 2/m : B2/b |
| Stibiocolumbite | SbNbO4 | Orth. mm2 |
| Stibiotantalite | Sb3+TaO4 | Orth. mm2 |
Common Associates
Associations Based on Photo Data:
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 | Sb3+TaO4 |
| 4.DE.30 | Cervantite | Sb3+Sb5+O4 |
| 4.DE.30 | Stibiocolumbite | SbNbO4 |
| 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
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 Bismutocolumbite
mindat.org URL:
https://www.mindat.org/min-688.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Bismutocolumbite
Localities for Bismutocolumbite
Showing 4 localities.
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.
Italy | |
| Pezzotta +1 other reference |
Russia | |
| Fialova et al. (2013) |
| ZVMO (1992) +1 other reference | |
Tajikistan | |
| Leonid Pautov and Mirak Mirakov ... |
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Danburitovaya pegmatite vein, Malkhan pegmatite field, Krasnyi Chikoy, Krasnochikoysky District, Zabaykalsky Krai, Russia