Bannermanite
A valid IMA mineral species
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About Bannermanite
Harold M. Bannerman
Formula:
(Na,K)0.7V4+0.7V5+5.3O15
Colour:
Black, light brown on thin edges in transmitted light
Lustre:
Sub-Metallic
Specific Gravity:
3.5
Crystal System:
Monoclinic
Name:
Named in honor of Harold MacColl Bannerman (1897, Barney’s River, Nova Scotia, Canada - 30 October 1976, Middletown, Connecticut, USA), economic geologist with the U.S. Geological Survey (Chief of the Non-metalliferous Geology Section and Chief of the Division of Economic Geology) and professor at Dartmouth College, Hanover, New Hampshire, USA.
Type Locality:
Visually similar to Unnamed (Na-V Oxide) (which is more common at the Liebenbergite slag locality in Lavrion).
Unique Identifiers
Mindat ID:
508
Long-form identifier:
mindat:1:1:508:3
Similar Names
| Bannermanite (of Thompson) | V2O5 (?) |
IMA Classification of Bannermanite
Approved
IMA Formula:
(Na,K)xV4+xV5+6-xO15 (0.5
Approval year:
1980
First published:
1983
Classification of Bannermanite
4.HF.05
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
F : Tektovanadates
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
F : Tektovanadates
47.3.5.1
47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
21.1.4
21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
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 |
|---|---|---|
| Bnm | 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 Bannermanite
Sub-Metallic
Transparency:
Opaque
Colour:
Black, light brown on thin edges in transmitted light
Streak:
Dark grey-black
Tenacity:
Brittle
Cleavage:
Perfect
on {100}, fair on {010}
on {100}, fair on {010}
Density:
3.5 g/cm3 (Measured) 3.55 g/cm3 (Calculated)
Optical Data of Bannermanite
Type:
Biaxial
Dispersion:
relatively strong
Chemistry of Bannermanite
Mindat Formula:
(Na,K)0.7V4+0.7V5+5.3O15
Elements listed:
Crystallography of Bannermanite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 15.413 Å, b = 3.615 Å, c = 10.066 Å
β = 109.29°
β = 109.29°
Ratio:
a:b:c = 4.264 : 1 : 2.785
Unit Cell V:
529.37 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Subhedral to euhedral lathlike crystals, flattened on {001} and elongated along [010].
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000903 | Bannermanite | Hughes J M, Finger L W (1983) Bannermanite, a new sodium-potassium vanadate isostructural with beta-Na_xV6O15 American Mineralogist 68 634-641 |  | 1983 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 7.24 Å | (100) |
| 3.367 Å | (100) |
| 3.068 Å | (80) |
| 2.911 Å | (80) |
| 9.47 Å | (70) |
| 3.491 Å | (70) |
| 2.725 Å | (60) |
Reference:
Comments:
Recorded on material from Izalco volcano, El Salvador (ICDD 35-713)
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45b : [Other oxidized fumarolic minerals] | |
| 47a : [Near-surface hydration of prior minerals] | |
| 47e : [Vanadates, chromates, manganates] | |
| Stage 10b: Anthropogenic minerals | <10 Ka |
| 56 : Slag and smelter minerals (see also #51 and #55) |
Type Occurrence of Bannermanite
General Appearance of Type Material:
Incrustations of subhedral to euhedral lathlike crystals of up to 250 µm
Place of Conservation of Type Material:
Department of Earth Sciences, Dartmouth College, Hanover, New Hampshire, USA;
Harvard University, Cambridge, Massachusetts, USA (No. 126482);
National Museum of Natural History, Washington, D.C., USA (Nos. 148832, 160385)
Harvard University, Cambridge, Massachusetts, USA (No. 126482);
National Museum of Natural History, Washington, D.C., USA (Nos. 148832, 160385)
Geological Setting of Type Material:
Vanadium-bearing sublimates in fumaroles on a basaltic volcanic cone
Associated Minerals at Type Locality:
Synonyms of Bannermanite
Other Language Names for Bannermanite
Common Associates
Associations Based on Photo Data:
| 1 photo of Bannermanite associated with Liebenbergite | Ni2(SiO4) |
| 1 photo of Bannermanite associated with Trevorite | Ni2+Fe3+2O4 |
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 Bannermanite
mindat.org URL:
https://www.mindat.org/min-508.html
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References for Bannermanite
Reference List:
Hughes, John M., Finger, Larry W. (1983) Bannermanite, a new sodium-potassium vanadate isostructural with β-NaxV6O15. American Mineralogist, 68 (5-6) 634-641
Hughes, John M., Finger, Larry W. (1983) Bannermanite, a new sodium-potassium vanadate isostructural with β-NaxV6O15. American Mineralogist, 68 (5-6) 634-641
Localities for Bannermanite
Showing 5 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.
Czech Republic | |
| Scharm +7 other references |
El Salvador (TL) | |
| Hughes et al. (1983) |
Greece | |
| Igor Pekov analysis (IR, SXRD, EPMA) +1 other reference |
Russia | |
| Pekov et al. (2013) |
| Pekov et al. (2014) |
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Liebenbergite slag dump, Agios Konstantinos, Lavreotiki, East Attica, Attica, Greece