Bariumbannisterite Mineral Data

General Bariumbannisterite Information

Chemical Formula:

(K,H3O)(Ba,Ca)(Mn++,Fe++,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O)

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

Empirical Formula:

K_0.75(H₃O)_0.25Ba_0.75Ca_0.25Mn²⁺₁₄Fe²⁺₄Mg₃Si₂₈Al₄O₉₀(OH)₆

IMA Status:

Not Approved IMA

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named as the barium analog of bannisterite.

Synonym:

Bannisterite - Barium rich

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Bariumbannisterite Crystallography

Crystal System:

Monoclinic

Physical Properties of Bariumbannisterite

Cleavage:

{???} Perfect

Color:

Dark brown.

Hardness:

4 - Fluorite

Optical Properties of Bariumbannisterite

Optical Data:

Calculated Properties of Bariumbannisterite

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Bariumbannisterite}= 19.95 barns/electron
U=PE_{Bariumbannisterite} x r_electron= . barns/cc.

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

Dana Class:

71.00.00.00 (71)Phyllosilicate Minerals

(71.00)Without Dana Classification Numbers

(71.00.00)Phyllosilicate Modulated Layers

71.00.00.00 Bariumbannisterite* (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O) Mono

71.00.00.00 Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2•2(H2O) Unk Ortho

71.00.00.00 Griffithite* 4(Mg,Fe,Ca)O.(Al,Fe)2O3.5SiO2•7(H2O) Mono

71.00.00.00 Orlovite KLi2TiSi4O11F C 2 2

71.00.00.00 Shlykovite KCa[Si4O9(OH)]•3H2O P 2₁/c 2/m

71.00.00.00 Spodiophyllite? (Na,K)4(Mg,Fe)3(Fe,Al)2(Si8O24) Mono

71.00.00.00 Voloshinite Rb(LiAl1.5[]0.5)(Al0.5Si3.5)O10F2 C 2/c 2/m

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

References:

PHYS. PROP.(Am.Min.,Vol.75,p936,1990)

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

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

Bariumbannisterite

(K,H3O)(Ba,Ca)(Mn++,Fe++,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O)
Dana No: 71.00.00.00 Strunz No: 09.EG.07.5
Locality:

Notes: