Bannermanite
A valid IMA mineral species
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About Bannermanite
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
GUID
(UUID V4):
(UUID V4):
63b387b6-e23d-4650-bdf1-f62673b9c7d6
IMA Classification of Bannermanite
Approved
IMA Formula:
(Na,K)xV4+xV5+6-xO15 (0.5<x<0.9)
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 |
---|---|---|
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) |
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:
Reference:
Hughes, J. M. and Finger, L. W. (1983) Bannermanite, a new sodium-potassium vanadate isostructural with β-NaxV6O15. American Mineralogist: 68: 634-642.
Synonyms of Bannermanite
Other Language Names for Bannermanite
Common Associates
Associated Minerals Based on Photo Data:
1 photo of Bannermanite associated with Liebenbergite | Ni2SiO4 |
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
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.
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, Lavrion slag localities, Lavreotiki, East Attica, Attica, Greece