Odinite Mineral Data

Odinite Mineral Data +

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General Odinite Information

Chemical Formula:

(Fe+++,Mg,Al,Fe++,Ti,Mn)2.5(Si,Al)2O5(OH)4

Composition:

Molecular Weight = 300.61 gm

Magnesium 5.66 % Mg 9.39 % MgO

Titanium 1.59 % Ti 2.66 % TiO₂

Manganese 1.83 % Mn 2.36 % MnO

Aluminum 6.28 % Al 11.87 % Al₂O₃

Iron 18.58 % Fe 7.17 % FeO / 18.59 % Fe₂O₃

Silicon 16.82 % Si 35.98 % SiO₂

Hydrogen 1.34 % H 11.99 % H₂O

Oxygen 47.90 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe³⁺_0.7Mg_0.7Al_0.5Fe²⁺_0.3Ti_0.1Mn²⁺_0.1Si_1.8Al_0.2O₅(OH)₄

Environment:

Formed in marine waters, a minor component of green clay infillings or replacements of microtests, bioclasts, fecal pellets, of mineral debris on shallow marine shelfs and lagoonal areas in tropical latitudes.

IMA Status:

Approved IMA 1988

Locality:

Minor component in sediments of the present day sea bottoms in lower latitudes near South America and Africa. Link to MinDat.org Location Data.

Name Origin:

Named for Gilles Serge Odin, clay mineralogist of the University P. And M. Curie, Paris, France.

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Odinite Crystallography

Axial Ratios:

a:b:c =0.5761:1:0.7895

Cell Dimensions:

a = 5.373, b = 9.326, c = 7.363, Z = 2; beta = 104° V = 357.99 Den(Calc)= 2.79

Crystal System:

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

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

By Intensity(I/I_o): 7.15(1), 3.58(0.85), 1.552(0.65),

Physical Properties of Odinite

Color:

Green, Dark green.

Density:

2.6

Diaphaniety:

Translucent to Opaque

Habit:

Cryptocrystalline - Occurs as crystals too small to distinguish with the naked eye.

Hardness:

2.5 - Finger Nail

Luster:

Silky

Streak:

gray green

Optical Properties of Odinite

Optical Data:

Biaxial (?)

Calculated Properties of Odinite

Electron Density:

r_electron=2.77 gm/cc
note: r_Odinite=2.79 gm/cc.

Fermion Index

Fermion Index = 0.01974
Boson Index = 0.98026

Photoelectric:

PE_Odinite= 7.14 barns/electron
U=PE_Odinite x r_electron= 19.81 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Odinite is Not Radioactive

Odinite Classification

Dana Class:

71.1.1.5 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.1)with 1:1 layers

(71.1.1)Kaolinite group

71.1.1.1 Dickite Al2Si2O5(OH)4 Cc m

71.1.1.2 Kaolinite Al2Si2O5(OH)4 P1 1

71.1.1.3 Nacrite Al2Si2O5(OH)4 Cc m

71.1.1.4 Halloysite Al2Si2O5(OH)4 Cc m

71.1.1.4a Endellite? Al2Si2O5(OH)4·2(H2O) Cc m

71.1.1.5 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.5(Si,Al)2O5(OH)4 Cm m

Strunz Class:

VIII/H.26-40 VIII - Silicates

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

VIII/H.26 - Allophane - Sturtite series

VIII/H.26-10 Allophane Al2O3·(SiO2)1.3-2·((H2O))2.5-3 None

VIII/H.26-30 Imogolite Al2SiO3(OH)4 ? Mono

VIII/H.26-40 Odinite (Fe,Mg,Al,Fe,Ti,Mn)2.5(Si,Al)2O5(OH)4 Cm m

VIII/H.26-50 Hisingerite Fe2Si2O5(OH)4·2(H2O) Unk Mono

VIII/H.26-60 Neotocite (Mn,Fe)SiO3·(H2O)(?) None

VIII/H.26-70 Sturtite* (Fe3)(Mn2,Ca,Mg)Si4O10(OH)3·10(H2O) None

Other Odinite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.81,1996)

See Also:

Links to other databases for Odinite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (MinSocAm) 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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

Odinite

(Fe+++,Mg,Al,Fe++,Ti,Mn)2.5(Si,Al)2O5(OH)4
Dana No: 71.1.1.5 Strunz No: VIII/H.26-40
Locality:

Notes: