Mineralogy Database

Bariumbannisterite Mineral Data

Search Webmineral :

General Bariumbannisterite Information

Help on Chemical  Formula: Chemical Formula: (K,H3O)(Ba,Ca)(Mn++,Fe++,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O)
Help on Composition: Composition: Molecular Weight = 3,648.84 gm
   Potassium   0.80 %  K     0.97 % K2O
   Barium      2.82 %  Ba    3.15 % BaO
   Calcium     0.27 %  Ca    0.38 % CaO
   Magnesium   2.00 %  Mg    3.31 % MgO
   Manganese  21.08 %  Mn   27.22 % MnO
   Aluminum    2.96 %  Al    5.59 % Al2O3
   Iron        6.12 %  Fe    7.88 % FeO
   Silicon    21.55 %  Si   46.11 % SiO2
   Hydrogen    0.19 %  H     1.67 % H2O
   Oxygen     42.20 %  O
             ______        ______ 
             100.00 %       96.27 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.75(H3O)0.25Ba0.75Ca0.25Mn2+14Fe2+4Mg3Si28Al4O90(OH)6
Help on IMA Status: IMA Status: Not Approved IMA
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the barium analog of bannisterite.
Help on Synonym: Synonym: Bannisterite - Barium rich

Bariumbannisterite Crystallography

Help on Crystal System: Crystal System: Monoclinic

Physical Properties of Bariumbannisterite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Dark brown.
Help on Hardness: Hardness: 4 - Fluorite

Optical Properties of Bariumbannisterite

Help on Optical Data: Optical Data:

Calculated Properties of Bariumbannisterite

Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEBariumbannisterite = 19.95 barns/electron
U=PEBariumbannisterite x relectron= . barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 11.29 (Gamma Ray American Petroleum Institute Units)
Concentration of Bariumbannisterite per GRapi unit = 8.86 (%)

Estimated Radioactivity from Bariumbannisterite - barely detectable


Bariumbannisterite Classification

Help on  Dana Class: Dana Class: (71)Phyllosilicate Minerals
  (71.00)Without Dana Classification Numbers
  (71.00.00)Phyllosilicate Modulated Layers Bariumbannisterite* (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O) Mono Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2•2(H2O) Unk Ortho Griffithite* 4(Mg,Fe,Ca)O.(Al,Fe)2O3.5SiO2•7(H2O) Mono Orlovite KLi2TiSi4O11F C 2 2 Shlykovite KCa[Si4O9(OH)]•3H2O P 21/c 2/m Spodiophyllite? (Na,K)4(Mg,Fe)3(Fe,Al)2(Si8O24) Mono Voloshinite Rb(LiAl1.5[]0.5)(Al0.5Si3.5)O10F2 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.EG.07.5 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EG -Double nets with 6-membered and larger rings
09.EG.07.5 Bariumbannisterite* (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O) Mono

Other Bariumbannisterite Information

Help on References: References: PHYS. PROP.(Am.Min.,Vol.75,p936,1990)
Help on See Also: See Also: Links to other databases for Bariumbannisterite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

Search for Bariumbannisterite using:

Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Bariumbannisterite :

Dakota Matrix
Excalibur Minerals
Exceptional Minerals
Hudson Insitute
John Betts Fine Minerals
Mc Dougall Minerals
Mineral News
Rock and Mineral Shows
Weinrich Minerals, Inc.

Ask about Bariumbannisterite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Espaņol

Print or Cut-and-Paste your Bariumbannisterite Specimen Label here :


Dana No: Strunz No: 09.EG.07.5