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Bariumbannisterite Mineral Data
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General Bariumbannisterite Information
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 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 |
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Potassium 0.80 % K 0.97 % K2O |
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Barium 2.82 % Ba 3.15 % BaO |
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Calcium 0.27 % Ca 0.38 % CaO |
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Magnesium 2.00 % Mg 3.31 % MgO |
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Manganese 21.08 % Mn 27.22 % MnO |
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Aluminum 2.96 % Al 5.59 % Al2O3 |
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Iron 6.12 % Fe 7.88 % FeO |
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Silicon 21.55 % Si 46.11 % SiO2 |
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Hydrogen 0.19 % H 1.67 % H2O |
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Oxygen 42.20 % O |
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______ ______ |
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100.00 % 96.27 % = TOTAL OXIDE |
| Empirical Formula: |
K0.75(H3O)0.25Ba0.75Ca0.25Mn2+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
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| Crystal System: |
Monoclinic |
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Physical Properties of Bariumbannisterite
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| Cleavage: |
{???} Perfect |
| Color: |
Dark brown. |
| Hardness: |
4 - Fluorite |
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Optical Properties of Bariumbannisterite
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| Optical Data: |
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Calculated Properties of Bariumbannisterite
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| Fermion Index: |
Fermion Index = 0.01
Boson Index = 0.99 |
| Photoelectric: |
PEBariumbannisterite = 19.95 barns/electron
U=PEBariumbannisterite x relectron= . barns/cc.
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| Radioactivity: |
GRapi = 11.29 (Gamma Ray American Petroleum Institute Units)
Concentration of Bariumbannisterite per GRapi unit = 8.86 (%)
Estimated Radioactivity from Bariumbannisterite  - barely detectable
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Bariumbannisterite Classification
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| Dana Class: |
71.00.00.00 (71)Phyllosilicate Minerals |
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(71.00)Without Dana Classification Numbers |
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(71.00.00)Phyllosilicate Modulated Layers |
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71.00.00.00 Bariumbannisterite* (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O) Mono |
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71.00.00.00 Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2•2(H2O) Unk Ortho |
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71.00.00.00 Griffithite* 4(Mg,Fe,Ca)O.(Al,Fe)2O3.5SiO2•7(H2O) Mono |
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71.00.00.00 Orlovite KLi2TiSi4O11F C 2 2 |
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71.00.00.00 Shlykovite KCa[Si4O9(OH)]•3H2O P 21/c 2/m |
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71.00.00.00 Spodiophyllite? (Na,K)4(Mg,Fe)3(Fe,Al)2(Si8O24) Mono |
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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) |
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09.E - Phyllosilicates |
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09.EG -Double nets with 6-membered and larger rings |
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09.EG.07.5 Bariumbannisterite* (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16•4-12(H2O) Mono |
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Other Bariumbannisterite Information
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| 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 :
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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:
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