IMA2004-013 Mineral Data

IMA2004-013 Mineral Data

General IMA2004-013 Information

Chemical Formula:

(Ba,K)(Mg,Fe++,Ti)3(Si,Al)4O10O2

Composition:

Molecular Weight = 507.62 gm

Potassium 1.93 % K 2.32 % K₂O

Barium 20.29 % Ba 22.65 % BaO

Magnesium 8.62 % Mg 14.29 % MgO

Titanium 2.83 % Ti 4.72 % TiO₂

Aluminum 5.32 % Al 10.04 % Al₂O₃

Iron 6.60 % Fe 8.49 % FeO

Silicon 16.60 % Si 35.51 % SiO₂

Oxygen 37.82 % O

______ ______

100.00 % 98.03 % = TOTAL OXIDE

Empirical Formula:

Ba_0.75K_0.25Mg_1.8Fe²⁺_0.6Ti_0.3Si₃AlO₁₀O₂

Environment:

Mica group

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Fernando-do-Noronha Island, Brazil Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

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IMA2004-013 Crystallography

Axial Ratios:

a:b:c =0.5765:1:1.0825

Cell Dimensions:

a = 5.3516, b = 9.2817, c = 10.0475, Z = 2; beta = 100.337° V = 490.98 Den(Calc)= 3.43

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 2.637(1), 2.172(0.9), 3.13(0.7),3.646(0.7), 3.383(0.6), 1.988(0.5), 2.435(0.5), 2.902(0.5),

Optical Properties of IMA2004-013

Optical Data:

NCalc= 1.65 - from Gladstone-Dale relationship (KC = 0.1913) where Ncalc=Dcalc*KC+1

Calculated Properties of IMA2004-013

Electron Density:

r_electron=3.22 gm/cc
note: r_IMA2004-013=3.38 gm/cc.

Fermion Index

Fermion Index = 0.05777
Boson Index = 0.94223

Photoelectric:

PE_IMA2004-013= 89.17 barns/electron
U=PE_IMA2004-013 x r_electron= 286.85 barns/cc.

Radioactivity:

GRapi = 26.42 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from IMA2004-013 - barely detectable

IMA2004-013 Classification

Dana Class:

71.2.2c.8 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.2)with 2:1 Layers

(71.2.2c)Mica Group (Margarite subgroup)

71.2.2c.1 Margarite CaAl2(Al2Si2)O10(OH)2 C 2/c 2/m

71.2.2c.2 Clintonite Ca(Mg,Al)3(Al3Si)O10(OH)2 C 2/m 2/m

71.2.2c.3 Bityite CaLiAl2(AlBeSi2)O10(OH)2 C 2/c 2/m

71.2.2c.4 Anandite (Ba,K)(Fe,Mg)3(Si,Al,Fe)4O10(S,OH)2 C 2/m 2/m

71.2.2c.5 Kinoshitalite (Ba,K)(Mg,Mn,Al)3Si2Al2O10(OH)2 C 2/m 2/m

71.2.2c.6 Ferrokinoshitalite! (Ba,K)(Fe,Mg)3(Si2Al2)O10(OH,F)2 C 2/m 2/m

71.2.2c.7 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m

71.2.2c.8 IMA2004-013 ! (Ba,K)(Mg,Fe,Ti)3(Si,Al)4O10O2 C 2/m 2/m

Strunz Class:

VIII/HX.00-00 VIII - Silicates

VIII/HX - Unclassified Strunz Phyllosilicates

VIII/HX.00 - Mica Group

Other IMA2004-013 Information

See Also:

Links to other databases for IMA2004-013 :
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)

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Print or Cut-and-Paste your IMA2004-013 Specimen Label here :

IMA2004-013

(Ba,K)(Mg,Fe++,Ti)3(Si,Al)4O10O2
Dana No: 71.2.2c.8 Strunz No: VIII/HX.00-00
Locality:

Notes: