IMA2004-008 Mineral Data

IMA2004-008 Mineral Data

General IMA2004-008 Information

Chemical Formula:

(Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O)

Composition:

Molecular Weight = 607.84 gm

Potassium 0.64 % K 0.77 % K₂O

Barium 6.78 % Ba 7.57 % BaO

Strontium 8.65 % Sr 10.23 % SrO

Titanium 11.82 % Ti 19.71 % TiO₂

Niobium 7.64 % Nb 10.93 % Nb₂O₅

Silicon 18.48 % Si 39.54 % SiO₂

Hydrogen 1.24 % H 11.11 % H₂O

Oxygen 44.75 % O

______ ______

100.00 % 99.87 % = TOTAL OXIDE

Empirical Formula:

Sr_0.6Ba_0.3K_0.1Ti_1.5Nb_0.5Si₄O₁₂OH_1.5O_0.5·3(H₂O)

Environment:

Labuntsovite group

IMA Status:

Proposed IMA 2004 (Dana # Added)

Locality:

Eveslogchorr Mountain, Khibiny massif, Kola Peninsula, Russia Link to MinDat.org Location Data.

Name Origin:

Commission on New Minerals and Mineral Names (CNMMN)

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IMA2004-008 Crystallography

Axial Ratios:

a:b:c =1.0182:1:0.5538

Cell Dimensions:

a = 14.49, b = 14.23, c = 7.881, Z = 4; beta = 117.28° V = 1,444.27 Den(Calc)= 2.80

Crystal System:

Monoclinic - DomaticH-M Symbol (m) Space Group: Cm

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

By Intensity(I/I_o): 3.23(1), 7.1(0.9), 2.51(0.8),3.135(0.8), 1.728(0.5), 6.45(0.5), 1.57(0.45), 5.01(0.4),

Optical Properties of IMA2004-008

Optical Data:

NCalc= 1.71 - from Gladstone-Dale relationship (KC = 0.2528) where Ncalc=Dcalc*KC+1

Calculated Properties of IMA2004-008

Electron Density:

r_electron=2.71 gm/cc
note: r_IMA2004-008=2.80 gm/cc.

Fermion Index

Fermion Index = 0.04225
Boson Index = 0.95775

Photoelectric:

PE_IMA2004-008= 51.40 barns/electron
U=PE_IMA2004-008 x r_electron= 139.45 barns/cc.

Radioactivity:

GRapi = 9.00 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from IMA2004-008 - barely detectable

IMA2004-008 Classification

Dana Class:

60.1.3.2 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.3)Labuntsovite Group (Unclassified)

60.1.3.1 Gjerdingenite-Fe! K2[(H2O)2(Fe,Mn)][(Nb,Ti)4(Si4O12)2(O,OH)4]·4(H2O) C 2/m 2/m

60.1.3.2 IMA2004-008 ! (Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O) Cm m

Strunz Class:

VIII/EX.00-00 VIII - Silicates

VIII/EX - Unclassified Strunz Cyklosilicates

VIII/EX.00 - Labuntsovite Group

Other IMA2004-008 Information

See Also:

Links to other databases for IMA2004-008 :
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 IMA2004-008 Specimen Label here :

IMA2004-008

(Sr,Ba,K)(Ti,Nb)2(Si4O12)(OH,O)2·3(H2O)
Dana No: 60.1.3.2 Strunz No: VIII/EX.00-00
Locality:

Notes: