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Bannermanite

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About BannermaniteHide

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:
For Dr. Harold MacColl Bannerman (1897-1976), American economic geologist, U.S. Geological Survey and Dartmouth College, Hanover, New Hampshire, USA.
Visually similar to Unnamed (Na-V Oxide) (which is more common at the Liebenbergite slag locality in Lavrion).




Classification of BannermaniteHide

Approved
4.HF.05

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
21.1.4

21 : Vanadates (and vanadates with arsenate or phosphate)
1 : Vanadates of the alkalis and Cu

Physical Properties of BannermaniteHide

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}
Density:
3.5 g/cm3 (Measured)    3.55 g/cm3 (Calculated)

Optical Data of BannermaniteHide

Type:
Biaxial
Dispersion:
relatively strong

Chemical Properties of BannermaniteHide

Formula:
(Na,K)0.7V4+0.7V5+5.3O15
IMA Formula:
(Na,K)xV4+xV5+6-xO15 (0.5< x<0.9)

Crystallography of BannermaniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 15.413 Å, b = 3.615 Å, c = 10.066 Å
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].

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
7.24 (100)
3.367 (100)
3.068 (80)
2.911 (80)
9.47 (70)
3.491 (70)
2.725 (60)
Comments:
Recorded on material from Izalco volcano, El Salvador (ICDD 35-713)

Type Occurrence of BannermaniteHide

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)
Geological Setting of Type Material:
Vanadium-bearing sublimates in fumaroles on a basaltic volcanic cone
Associated Minerals at Type Locality:

Synonyms of BannermaniteHide

Other Language Names for BannermaniteHide

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

21.1.1MetamuniriteNaVO3Orth.
21.1.2MuniriteNaVO3 · 1.9H2OMon.
21.1.3Barnesite(Na,Ca)V6O16 · 3H2OMon. 2/m : P2/m
21.1.5HowardevansiteNaCuFe2(VO4)3Tric. 1 : P1
21.1.6HuemuliteNa4Mg(V10O28) · 24H2OTric.
21.1.7Blossiteα-Cu2(V2O7)Orth. mm2 : Fdd2
21.1.8Ziesiteβ-Cu2(V2O7)Mon.
21.1.9StoiberiteCu5(VO4)2O2Mon.
21.1.10McbirneyiteCu3(VO4)2Tric.
21.1.11FingeriteCu11(VO4)6O2Tric. 1 : P1
21.1.12VolborthiteCu3(V2O7)(OH)2 · 2H2OMon. 2/m : B2/m
21.1.13TangeiteCaCu(VO4)(OH)Orth. 2 2 2 : P21 21 21
21.1.14VésigniéiteBaCu3(VO4)2(OH)2Mon. 2/m : B2/m
21.1.15LyonsiteCu3Fe4(VO4)6Orth.

Other InformationHide

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

References for BannermaniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Hughes, J. M. and Finger, L. W. (1983): Bannermanite, a new sodium-potassium vanadate 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 BannermaniteHide

Localities for BannermaniteHide

ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Czech Republic
 
  • 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 (TL)
 
  • Sonsonate Department
Amer.Min.(1983) 68, 634-641
Greece
 
  • Attikí Prefecture (Attica; Attika)
    • Lavrion District (Laurion; Laurium; Lavreotiki Municipality)
      • Lavrion District slag localities
        • Agios Konstantinos [St Constantine] (Kamariza)
Igor Pekov analysis (IR, SXRD, EPMA); Koshlyakova, N.N., Zubkova, N.V., Pekov, I.V., Giester, G., Pushcharovsky, D.Yu., Chukanov, N.V., Voudouris, P., Magganas, A., Katerinopoulos, A. (2016): Crystal chemistry of a Ni-Mg-analogue of lyonsite from slags of Lavrion, Greece. Neues Jahrbuch für Mineralogie - Abhandlungen: Journal of Mineralogy and Geochemistry 193, 113-120.
Russia
 
  • Kamchatka Oblast'
Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Kartashov, P.M., Polekhovsky, Yu.S., Murashko, M.N., Pushcharovsky, D.Y. (2014): Koksharovite, CaMg2Fe3+4(VO4)6, and grigorievite, Cu3Fe3+2Al2(VO4)6, two new howardevansite-group minerals from volcanic exhalations. European Journal of Mineralogy, 26, 667-677.
Mineral and/or Locality  
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