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Bannisterite

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Formula:
Ca0.5(K,Na)0.5(Mn,Fe,Zn)10(Si,Al)16O38(OH)8 · 5.5H2O
System:
Monoclinic
Colour:
Dark brown
Hardness:
4
Name:
Named by Marie Louise Lindberg Smith and Clifford Frondel in 1968 in honor of Dr. Frederick Allen Bannister (1901-1970), mineralogist and x-ray crystallographer, formerly Keeper of Minerals, British Museum (Natural History), London, England, UK. (Originally identified as ganophyllite in 1936 by William Frederick Foshag.)
Dark bown flat platy aggregates.

Classification of Bannisterite

Approved 1967
9.EG.75

9 : SILICATES (Germanates)
E : Phyllosilicates
G : Double nets with 6-membered and larger rings
74.1.1.4

74 : PHYLLOSILICATES Modulated Layers
1 : Modulated Layers with joined islands
16.16.15

16 : Silicates Containing Aluminum and other Metals
16 : Aluminosilicates of Mn
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First Recorded Occurrence of Bannisterite

Year of Discovery:
1967
Geological Setting of First Recorded Material:
Silicate-carbonate hosted zinc deposit.
Associated Minerals at First Recorded Locality:

Occurrences of Bannisterite

Geological Setting:
Sulfide-bearing zinc deposits

Physical Properties of Bannisterite

Sub-Vitreous, Resinous, Greasy
Diaphaneity (Transparency):
Translucent
Colour:
Dark brown
Streak:
Creamy white
Hardness (Mohs):
4
Cleavage:
Perfect
{001}
Fracture:
Micaceous
Comment:
Cleavages are smooth without ruling, A-structure, or imperfections typical of True Micas.
Density:
2.83 - 2.84 g/cm3 (Measured)    2.84 g/cm3 (Calculated)

Crystallography of Bannisterite

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 22.26Å, b = 16.36Å, c = 24.66Å
β = 94.28°
Ratio:
a:b:c = 1.361 : 1 : 1.507
Unit Cell Volume:
V 8,955.48 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Platy aggregates
Comment:
A2/a
X-Ray Powder Diffraction Data:
d-spacingIntensity
12.33 (100)
4.593 (10)
4.103 (15b)
3.436 (20)
3.077 (12)
2.638 (15)
2.606 (11)
2.41 (10)
Comments:
ICDD 21-57; Structurally similar to ganophyllite and the stilpnomelane group

Optical Data of Bannisterite

Type:
Biaxial
RI values:
nα = 1.544 - 1.574 nβ = 1.586 - 1.611 nγ = 1.589 - 1.612
2V:
Calculated: 18° to 28°
Birefringence:
0.045
Max Birefringence:
δ = 0.045
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
r < v weak to moderate
Pleochroism:
Visible
Comments:
X colorless to pale yellow

Chemical Properties of Bannisterite

Formula:
Ca0.5(K,Na)0.5(Mn,Fe,Zn)10(Si,Al)16O38(OH)8 · 5.5H2O
Essential elements:
All elements listed in formula:
Common Impurities:
Zn,Na

Relationship of Bannisterite to other Species

9.EG.05CymriteBaAl2Si2(O,OH)8 · H2O
9.EG.10Naujakasite(Na,K)6(Fe2+,Mn2+,Ca)(Al,Fe)4Si8O26
9.EG.10ManganonaujakasiteNa6(Mn2+,Fe2+)Al4Si8O26
9.EG.15DmisteinbergiteCaAl2Si2O8
9.EG.20KampfiteBa12(Si11Al5)O31(CO3)8Cl5
9.EG.25SträtlingiteCa2Al2SiO7 · 8H2O
9.EG.25VertumniteCa4Al4Si4O6(OH)24 · 3H2O
9.EG.30Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
9.EG.30Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
9.EG.30Tamaite(Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112 · 21H2O
9.EG.35CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
9.EG.35ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
9.EG.40Franklinphilite(K,Na)4(Mn,Zn,Mg,Fe)48(Si,Al)72(O,OH)216 · 6H2O
9.EG.40LennilenapeiteK6-7(Mg,Mn,Fe,Zn)48(Si,Al)72(O,OH)216 · 16H2O
9.EG.40ParsettensiteK1.2Mn8(Si,Al)12O26(OH)10
9.EG.40Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al,Fe3+)8(Si,Al)12(O,OH)36 · nH2O
9.EG.45Latiumite(Ca,K)4(Si,Al)5O11(SO4,CO3)
9.EG.45Tuscanite(K(Ca,Na)6(Si,Al)10O22[SO4,CO3,(OH)2] · H2O
9.EG.50JagoitePb18Fe43+[Si4(Si,Fe3+)6][Pb4Si16(Si,Fe)4]O82Cl6
9.EG.55WickenburgiteCaPb3Al2Si10O24(OH)6
9.EG.60HyttsjöitePb18Ba2Ca5Mn22+Fe23+Si30O90Cl · 6H2O
9.EG.65ArmbrusteriteK5Na7Mn15[(Si9O22)4](OH)10 · 4H2O
9.EG.70Britvinite[Pb7(OH)3F(BO3)2(CO3)][Mg4.5(OH)3(Si5O14)]
16.16.1KanonaiteMn3+Al(SiO4)O
16.16.2SpessartineMn32+Al2(SiO4)3
16.16.3DavreuxiteMnAl6Si4O17(OH)2
16.16.4SursassiteMn22+Al3(Si2O7)(SiO4)(OH)3
16.16.5CarpholiteMn2+Al2(Si2O6)(OH)4
16.16.6KellyiteMn22+Al(AlSiO5)(OH)4
16.16.7PennantiteMn52+Al(AlSi3O10)(OH)8
16.16.8Akatoreite(Mn2+,Fe2+)9Al2(HSi4O13)2(OH)6
16.16.9Ganophyllite(K,Na,Ca)2Mn8(Si,Al)12(O,OH)32 · 8H2O
16.16.10Mangano-ferri-eckermannite[Na][Na2][Mn42+(Fe3+)]Si8O22(OH)2
16.16.11Masutomilite(K,Rb)(Li,Mn3+,Al)3(AlSi3O10)(F,OH)2
16.16.13HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13
16.16.14Eggletonite(Na,K,Ca)2(Mn,Fe)8(Si,Al)12O29(OH)7 · 11H2O
16.16.16Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44
16.16.17ZussmaniteK(Fe,Mg,Mn)13(Si,Al)18O42(OH)14
16.16.18CoombsiteK(Mn,Fe,Mg)13(Si,Al)18O42(OH)14
16.16.19HenritermieriteCa3(Mn3+,Al)2(SiO4)2(OH)4
16.16.20MacfalliteCa2(Mn3+,Al)3(Si2O7)(SiO4)(OH)3
16.16.21Ottrélite(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
16.16.22Piemontite{Ca2}{Al2Mn3+}(Si2O7)(SiO4)O(OH)
16.16.23OkhotskiteCa2(Mn2+,Mg)(Mn3+,Al,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
16.16.24Pumpellyite-(Mn2+)Ca2(Mn2+,Mg)(Al,Mn3+,Fe3+)2(Si2O7)(SiO4)(OH)2 · H2O
16.16.25Piemontite-(Sr){CaSr}{Al2Mn3+}(Si2O7)(SiO4)O(OH)

Other Names for Bannisterite

Name in Other Languages:

Other Information

Not fluorescent in UV
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 Bannisterite

Reference List:
Pavlides, Louis and Milton, Charles, 1962, Geology and Manganese Deposits of the Maple and Hovey Mountains Area, Aroostook County, Maine, U. S. Geological Survey Professional Paper 362, pp. 116 + plates.

Smith, M.L. and Frondel, C. (1968) The related layered minerals ganophyllite, bannisterite and stilpnomelane. Mineralogical Magazine: 36: 893-913.

American Mineralogist (1969): 54: 577.

American Mineralogist (1981): 66: 1063-1067.

American Mineralogist (1993): 78: 236.

Clays and Clay Minerals: 40: 129-144.

Internet Links for Bannisterite

Specimens:
The following Bannisterite specimens are currently listed for sale on minfind.com.

Localities for Bannisterite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Australia
 
  • New South Wales
    • Yancowinna Co.
Birch, W. D., ed. (1999): The minerals of Broken Hill. Broken Hill City Council and Museum of Victoria, Broken Hill, Australia, 289 pp.
Birch et al - 1999, Minerals of Broken Hill - Second Edition.
Keith Compton collection
Japan
 
  • Honshu Island
    • Chubu region
      • Shizuoka prefecture
Sameshima, Teruhiko; Ono, Susumu (1994) Ferroaxinite and datolite from Mt. Nio, Shizuoka city, central Japan. Geosci.Repts.Shizuoka Univ.,20 (Mar.,1994),1−4
    • Kanto Region
      • Saitama Prefecture
        • Hannou
Satoshi Matsubara (1981) Taneyamalite, (Na, Ca)(Mn2+,Mg,Fe3+,Al)12Si12 (O,OH)44, a New Mineral from the Iwaizawa Mine, Saitama Prefecture, Japan. Mineralogical Magazine 44:51-53.
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
    • Kinki region
      • Mie Prefecture
        • Toba City
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
    • Tohoku Region
      • Iwate Prefecture
        • Shimohei-gun
          • Yamada
Dr. Matsuo Nambu ore collection (curated at Geological Survey of Japan)
  • Shikoku Island
    • Kochi Prefecture
      • Nagaoka-gun
Masutomi Museum specimen, Kyoto; Smith, M.L. and Frondel, C. (1968) The related layered minerals ganophyllite, bannisterite and stilpnomelane. Mineralogical Magazine: 36: 893-913.
Norway
 
  • Telemark
    • Tokke
      • Botnedal
Wel, D.van der. (1999): The Minerals of the Brandsnuten Manganes Deposit, Tokke, Norway. Bergverksmuseets Skrift 15: 74-86
Romania
 
  • Suceava Co.
    • Suceava district
      • Iacobeni (Jakobeny; Jacobeny; Jakabfalva)
http://minerals-of-the-carpathians.eu
Russia
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Ekaterinburg (Sverdlovsk)
          • Kurganovo
Brusnitsyn A.I. (2000) Rhodonite deposits of Middle Ural, - S.-Peterburg Univercity press, p. 200 (in Rus.).
Slovakia
 
  • Košice Region
    • Gelnica Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
    • Košice Co.
Pauliš P., Ďuďa R., 2002: Nejzajimavejší mineralogická nalezište Slovenska. Kuttna, Kutná Hora, 134p.
Sweden
 
  • Västmanland
    • Lindesberg
No reference listed
Kjell Gatedal
UK
 
  • Wales
    • Gwynedd (Caernarvonshire)
      • Lleyn Peninsula
        • Llanfaelrhys
          • Rhiw
Smith, M.L. and Frondel, C. (1968) The related layered minerals ganophyllite, bannisterite and stilpnomelane. Mineralogical Magazine: 36: 893-913.; UK Journal of mines & Minerals, number 29 pp47-48
USA
 
  • New Jersey
    • Sussex Co.
      • Franklin Mining District
        • Franklin
Dunn(1995):Pt4:487.; Smith, M.L. and Frondel, C. (1968) The related layered minerals ganophyllite, bannisterite and stilpnomelane. Mineralogical Magazine: 36: 893-913.
  • North Carolina
    • Alleghany Co.
      • Sparta
        • Bald Knob
Mineral and/or Locality  
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