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Minnesotaite Mineral Data

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General Minnesotaite Information

Help on Chemical  Formula: Chemical Formula: (Fe++,Mg)3Si4O10(OH)2
Help on Composition: Composition: Molecular Weight = 458.12 gm
   Magnesium   2.65 %  Mg    4.40 % MgO
   Iron       30.48 %  Fe   39.21 % FeO
   Silicon    24.52 %  Si   52.46 % SiO2
   Hydrogen    0.44 %  H     3.93 % H2O
   Oxygen     41.91 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Fe2+2.5Mg0.5Si4O10(OH)2
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1944
Help on Locality: Locality: Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after its occurrence in Minnesota, USA.
Help on Name Pronunciation: Name Pronunciation: Minnesotaite + Pronunciation Say MINNESOTAITE
Help on Synonym: Synonym: Iron Talc
 

Minnesotaite Image

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  Minnesotaite

Comments: Greenish-gray dull minnesotaite masses in iron ore matrix.
Location: Virginia, Saint Louis County, Minnesota, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Minnesotaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.5969:1:1.0217
Help on Cell Dimensions: Cell Dimensions: a = 5.623, b = 9.419, c = 9.624, Z = 2; alpha = 85.21°, beta = 95.64°, gamma = 90° V = 505.48 Den(Calc)= 3.01
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: C1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 9.54(1), 2.53(0.7), 3.18(0.5),
 

Physical Properties of Minnesotaite

Help on Cleavage: Cleavage: {001} Perfect
Help on Color: Color: Pale green.
Help on Density: Density: 3.01
Help on Diaphaneity: Diaphaneity: Translucent
Help on Fracture: Fracture: Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.
Help on Habit: Habit: Foliated - Two dimensional platy forms.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Hardness: Hardness: 1.5-2 - Talc-Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: white
 

Optical Properties of Minnesotaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.028 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.028 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1993,KPDmeas= 0.1993,KC= 0.205
Ncalc = 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.578-1.583, b=1.578-1.622, g=1.615-1.623, bire=0.0370-0.0400, 2V(Calc)=0-16, 2V(Meas)=4.
Help on Pleochroism (x): Pleochroism (x): colorless or pale yellow.
Help on Pleochroism (y): Pleochroism (y): colorless or pale green.
Help on Pleochroism (z): Pleochroism (z): colorless or pale green.
 

Calculated Properties of Minnesotaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.96 gm/cc
note: Specific Gravity of Minnesotaite =3.01 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEMinnesotaite = 10.04 barns/electron
U=PEMinnesotaite x rElectron Density= 29.68 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Minnesotaite is Not Radioactive
 

Minnesotaite Classification

Help on  Dana Class: Dana Class: 71.02.01.05 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.02)with 2:1 Layers
  (71.02.01)Pyrophyllite-talc group
 
71.02.01.01 Pyrophyllite Al2Si4O10(OH)2 P1 1
 
71.02.01.02 Ferripyrophyllite Fe2Si4O10(OH)2 C 2/m 2/m
 
71.02.01.03 Talc Mg3Si4O10(OH)2 C 2/c 2/m
 
71.02.01.04 Willemseite (Ni,Mg)3Si4O10(OH)2 C 2/c 2/m
 
71.02.01.05 Minnesotaite (Fe,Mg)3Si4O10(OH)2 C1 1
 
71.02.01.06 Brinrobertsite! (Na,K,Ca)x(Al,Fe,Mg)4(Si,Al)8O20(OH)4•3.54(H2O)[x=0.35,n=3.54] pseudo 2/m 2/m
Help on  Strunz Class: Strunz Class: 09.EC.05 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets
 
09.EC.05 Minnesotaite (Fe,Mg)3Si4O10(OH)2 C1 1
 
09.EC.05 Talc Mg3Si4O10(OH)2 C 2/c 2/m
 
09.EC.05 Willemseite (Ni,Mg)3Si4O10(OH)2 C 2/c 2/m
 

Other Minnesotaite Information

Help on References: References: NAME( Heinrich65) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65)
Help on See Also: See Also: Links to other databases for Minnesotaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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

Minnesotaite

(Fe++,Mg)3Si4O10(OH)2
Dana No: 71.02.01.05 Strunz No: 09.EC.05
Locality:

 

Notes:

 

 
   
 


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