Bismutocolumbite
A valid IMA mineral species
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About Bismutocolumbite
Formula:
Bi(Nb,Ta)O4
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
GUID
(UUID V4):
(UUID V4):
230cf9f1-2d2b-493f-af5e-10a7e2a10c29
IMA Classification of Bismutocolumbite
Approved
IMA Formula:
BiNbO4
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 |
---|---|---|
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 = 2.380 nβ = 2.420 nγ = 2.470
2V:
Calculated: 85°
Max Birefringence:
δ = 0.090
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
Relatively strong
Chemistry of Bismutocolumbite
Mindat Formula:
Bi(Nb,Ta)O4
Elements listed:
Common Impurities:
Pb,Sb,Sn,Ti
Crystallography of Bismutocolumbite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/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:
Reference:
Peretazhko, I. S., Zagorskiy, V. E., Sapozhnikov, A. N., Bobrov, Y. D. and Rakcheev, A. D. (1992) Bismutocolumbite Bi(Nb,Ta)O4 - a new mineral from miarolitic pegmatites. Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 121(3): 130-134 (in Russian)
Synonyms of Bismutocolumbite
Other Language Names for Bismutocolumbite
Relationship of Bismutocolumbite to other Species
Member of:
Other Members of this group:
Bismutotantalite | Bi(Ta,Nb)O4 | Orth. |
Cervantite | Sb3+Sb5+O4 | Orth. mm2 |
Clinocervantite | Sb3+Sb5+O4 | Mon. 2/m : B2/b |
Stibiocolumbite | Sb(Nb,Ta)O4 | Orth. mm2 |
Stibiotantalite | Sb(Ta,Nb)O4 | Orth. mm2 |
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
4.DE. | Ziroite | ZrO2 |
4.DE. | Pertoldite | GeO2 |
4.DE. | Colchesterite | Bi3+2Mo6+2O9 |
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 | Koechlinite | Bi2MoO6 |
4.DE.15 | Russellite | Bi2WO6 |
4.DE.15 | Tungstibite | Sb3+2WO6 |
4.DE.20 | Tellurite | TeO2 |
4.DE.25 | Paratellurite | TeO2 |
4.DE.30 | Bismutotantalite | Bi(Ta,Nb)O4 |
4.DE.30 | Cervantite | Sb3+Sb5+O4 |
4.DE.30 | Stibiotantalite | Sb(Ta,Nb)O4 |
4.DE.30 | Stibiocolumbite | Sb(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
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
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References for Bismutocolumbite
Localities for Bismutocolumbite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Italy | |
| Pezzotta +1 other reference |
Russia | |
| Fialova et al. (2013) |
[Lapis 1993:1 p13-15 +2 other references | |
Tajikistan | |
| Leonid Pautov and Mirak Mirakov ... |
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Danburitovaya pegmatite vein, Malkhan pegmatite field, Krasnyi Chikoy, Krasnochikoysky District, Zabaykalsky Krai, Russia