Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Bannermanite

Formula:
(Na,K)
 
0.7
V
4+
0.7
V
5+
5.3
O
 
15
System:MonoclinicColour:Black, light brown on ...
Lustre:Sub-Metallic
Name:For Dr. Harold MacColl Bannerman (1897-1976), American economic geologist, U.S. Geological Survey and Dartmouth College, Hanover, New Hampshire, USA.
This page provides mineralogical data about Bannermanite.

Classification of Bannermanite

IMA status:Approved
Strunz 8th edition ID:4/G.13-10
Nickel-Strunz 10th (pending) edition ID:4.HF.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
F : Tektovanadates
Dana 8th edition ID:47.3.5.1

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts
Hey's CIM Ref.:21.1.4

21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu
mindat.org URL:http://www.mindat.org/min-508.html
Please feel free to link to this page.

Type Occurrence of Bannermanite

Type Locality:Izalco Volcano, Sonsonate Department, El Salvador
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)
Year of Discovery:1983
Geological Setting of type material:Vanadium-bearing sublimates in fumaroles on a basaltic volcanic cone
Associated Minerals at type locality:
ZiesiteStoiberiteShcherbinaiteFingeriteChalcocyanite
Chalcanthite

Physical Properties of Bannermanite

Lustre:Sub-Metallic
Diaphaneity (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}
Density (measured):3.5 g/cm3
Density (calculated):3.55 g/cm3

Crystallography of Bannermanite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:B2/m {B1 1 2/m} {C2/m} {C1 2/m 1}
Cell Parameters:a = 15.413Å, b = 3.615Å, c = 10.066Å
β = 109.29°
Ratio:a:b:c = 4.264 : 1 : 2.785
Unit Cell Volume:V 529.37 ų (Calculated from Unit Cell)
Z:2
Morphology:Subhedral to euhedral lathlike crystals, flattened on {001} and elongated along [010]
X-Ray Powder Diffraction:
d-spacingIntensity
7.24 (100)
3.367 (100)
3.068 (80)
2.911 (80)
9.47 (70)
3.491 (70)
Comments:Recorded on material from Izalco volcano, El Salvador (ICDD 35-713)

Optical Data of Bannermanite

Type:Biaxial
Dispersion:relatively strong

Chemical Properties of Bannermanite

Formula:
(Na,K)
 
0.7
V
4+
0.7
V
5+
5.3
O
 
15
Essential elements:Na, O, V
All elements listed in formula:K, Na, O, V
Analytical Data:Averages of six electron microprobe analyses of type material; V4+:V5+ ratio calculated from the charge balance
V2O5 (95.98)
Na2O (3.03)
K2O (1.26)

sum 100.27 wt.-%
Empirical Formula:
(Na
 
0.56
K
 
0.15
)
 
=0.71
V
4+
0.71
V
5+
5.29
O
 
15

Relationship of Bannermanite to other Species

Related Minerals - Hey's Index Grouping:

- +
21.1.1Metamunirite
NaVO
 
3
21.1.2Munirite
NaVO
 
3
·2H
 
2
O
21.1.3Barnesite
Na
 
2
[V
 
2
O
 
6
|V
 
4
O
 
10
] · 3H
 
2
O
21.1.5Howardevansite
NaCuFe
 
2
(VO
 
4
)
 
3
21.1.6Huemulite
Na
 
4
Mg[V
 
10
O
 
28
] · 24H
 
2
O
21.1.7Blossite
α-Cu
 
2
[V
 
2
O
 
7
]
21.1.8Ziesite
β-Cu
 
2
[V
 
2
O
 
7
]
21.1.9Stoiberite
Cu
 
5
[O
 
2
|(VO
 
4
)
 
2
]
21.1.10Mcbirneyite
Cu
 
3
(VO
 
4
)
 
2
21.1.11Fingerite
Cu
 
11
[O
 
2
|(VO
 
4
)
 
6
]
21.1.12Volborthite
Cu
 
3
[(OH)
 
2
|V
 
2
O
 
7
] · 2H
 
2
O
21.1.13Tangeite
CaCu[OH|VO
 
4
]
21.1.14Vésigniéite
BaCu
 
3
[OH|VO
 
4
]
 
2
21.1.15Lyonsite
Cu
 
3
Fe
 
4
(VO
 
4
)
 
6

Other Names for Bannermanite

Synonyms:
Bannermanite (of Hughes et al.)IMA1980-010
Other Languages:
German:Bannermanit
Russian:Баннерманит
Spanish:Bannermanita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Bannermanite

Reference List:Hughes, J. M. and Finger, L. W. (1983): Bannermanite, a new sodium-potassium vanadata isostructural with β-NaxV6O15. American Mineralogist 68, 634-642.

Evans, H. T., Jr. and Hughes, J. M. (1990): Crystal chemistry of the natural vanadium bronzes. American Mineralogist 75, 508-521, esp. 511-512, 519.

Anthony, J. W. et al. (1997): Handbook of Mineralogy, Vol. 3, 36.

Internet Links for Bannermanite

Search Engines:
  • Look for Bannermanite on Google
  • Look for Bannermanite images on Google
    • External Links:
  • Look for Bannermanite on Webmineral
  • Look for Bannermanite on Athena Mineralogy
  • Look for Bannermanite on Wikipedia
  • Look for Bannermanite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Bannermanite in the Natural History Museum (London) online catalogue
  • Bannermanite details from Handbook of Mineralogy (PDF)
    • Mineral Dealers:
  • Buy Minerals and Crystals from Crystalarium.com
  • Top quality minerals from Kristalle of California
  • Fine Minerals from Dan Weinrich Minerals
  • Wilensky Fine Minerals
  • Buy from David K Joyce minerals
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Buy fine minerals and gemstones from Pala International
  • Fabre Minerals - search for Bannermanite specimens
  • rare and unusual minerals mainly crystallized
  • Find Bannermanite on www.crystalclassics.co.uk
  • Edwards Minerals - Fine Specimens
  • Buy minerals from Mineralium.com
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Bannermanite

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Afghanistan
     
    • Badakhshan (Badakshan; Badahsan) Province
      • Koksha Valley (Kokscha; Kokcha)
    		No reference listed
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Liberec Region
    		Scharm, B.: Přehled minerálů nalezených v oblasti uranových koncentrací v severočeské křídě. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 169-172.
    El Salvador
     
    • Sonsonate Department
    		Amer.Min.(1983) 68, 634-641
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 7th Nov 2009 17:24:36