Bariumbannisterite Mineral Data

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-Ba

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Bariumbannisterite Crystallography

Crystal System:

Monoclinic

Physical Properties of Bariumbannisterite

Cleavage:

[???] Perfect

Color:

Dark brown.

Hardness:

4 - Fluorite

Calculated Properties of Bariumbannisterite

Fermion Index

Fermion Index = 0.01859
Boson Index = 0.98141

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)

Estimated Radioactivity from Bariumbannisterite - barely detectable

Bariumbannisterite Classification

Dana Class:

71.0.0.0 (71)Phyllosilicate Minerals

(71.0)Without Dana Classification Numbers

(Phyllosilicate Modulated Layers)

Strunz Class:

VIII/H.17-20 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups

VIII/H.17 - Stilpnomelane series

VIII/H.17-10 Bannisterite KCa(Mn,Fe,Zn,Mg)21(Si,Al)32O76(OH)16·4-12(H2O) A2/a 2/m

VIII/H.17-20 Bariumbannisterite (K,H3O)(Ba,Ca)(Mn,Fe,Mg)21(Si,Al)32O80(O,OH)16·4-12(H2O) Mono

VIII/H.17-30 Lennilenapeite K6-7(Mg,Mn,Fe,Fe,Zn)48(Si,Al)72(O,OH)216·16(H2O) Unk (pseudo-HEX) Tri

VIII/H.17-40 Stilpnomelane K(Fe,Mg,Fe)8(Si,Al)12(O,OH)27·n(H2O) P1 1

VIII/H.17-45 Franklinphilite (K,Na)4(Mn,Mg,Zn)48(Si,Al)72(O,OH)216·6(H2O) pseudo-HEX P1 or P1 Tri

VIII/H.17-50 Parsettensite (K,Na,Ca)(Mn,Al)7Si8O20(OH)8·2(H2O)(?) C 2/m 2/m

VIII/H.17-60 Ganophyllite (K,Na)2(Mn,Al,Mg)8(Si,Al)12O29(OH)7·8-9(H2O) A2/a 2/m

VIII/H.17-70 Eggletonite Na2Mn8[Si11AlO29](OH)7·11(H2O) Ia or I2/a Mono

VIII/H.17-75 Tamaite! (Ca,K,Ba,Na)3-4Mn24(Si,Al)40(O,OH)112·21(H2O) P 2₁/a 2/m

VIII/H.17-80 Ekmanite? (Fe,Mg,Mn,Fe)3(Si,Al)4O10(OH)2·2(H2O) Unk Ortho

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 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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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: Unknown Strunz No: VIII/H.17-20
Locality:

Notes: