https://www.mineralbox.biz
http://www.spessartit.de/walldorf.html
https://www.mineral-bosse.de
https://www.mineraliengrosshandel.com
https://www.edelsteine-neuburg.de
'._('einklappen').'
 

Minnesotaite (Minnesotait)

Collectors Summary

Color blass grün
Streak color weiß
Lustre Fettglanz, Wachsglanz, matt
Hardness (Mohs) 2.75
Cleavages vollkommen {001} glimmerartig
Crystal System triklin, P1

Chemism

Chemical formula

Fe2+3Si4O10(OH)2

Chemical composition

Eisen, Silicium, Sauerstoff, Wasserstoff

Unit weight: 473.886774 u; Number of atoms in the formula: 21

Info

Empirical formula:

Fe3Si4O10(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.43

2

9.52

1.0079470

2.0158940
Oxygen

O

40.51

12

57.14

15.9994300

191.9931600
Silicon

Si

23.71

4

19.05

28.0855300

112.3421200
Iron

Fe

35.35

3

14.29

55.8452000

167.5356000

Analysis wt%

SiO2 : 51.79, Al2O3 : 1.46, Fe2O3 : 0.61, FeO : 35.65, MnO : 0.78, MgO : 3.21, K2O : 0.44, H2O : 5.06 (Ref: American Mineralogist 65)

Strunz 9th edition incl. updates

9.EC.05

9: Silikate (Germanate)
E: Schichtsilikate (Phyllosilikate)
C: Schichtsilikate (Phyllosilikate) mit Glimmer Tafeln, zusammengesetzt aus tetrahedralen oder octahedralen Netzen
05:Talk-Gruppe

Lapis Classification

VIII/H.09-050

VIII: SILIKATE
H: Schichtsilikate
9: Glimmerartige Schicht-silikate mit Baugruppen [Si4O10] 4- und verwandte Strukturen

Classification by Hölzel

9.EF.130

9: SILICATES
E: Phyllosilicates
F: Other Micas without H2O
1: Triclinic Stilpnomelane-Group

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Pyrophyllite-Talc group

Optical Properties

Color

blass grün

Streak color

weiß

Diaphaneity (Transparency)

durchscheinend

Lustre

Fettglanz, Wachsglanz, matt

max. Birefringence

0.040
Birefringence chart\! Minnesotaite title=Birefringence chart Minnesotaite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.592

RI value β

1.631

RI value γ / ε

1.632

Ri mean

1.618

2V angle

Biaxial (-) klein

Pleochroism

X = blassgrün, Z = farblos zu blass grünlichgelb

Crystallography

Crystal System

triklin

Class (H-M)

1

Space Group number

2

Space Group

P1

Cell parameters a (Å)

5.623

Cell parameters b (Å)

9.419

Cell parameters c (Å)

9.624

Cell parameters a/b or c/a

0.597

Cell parameters c/b

1.022

Cell parameters α

85.21°

Cell parameters β

95.64°

Cell parameters γ

90°

Z

2

Volumne (ų)

505.46

X-Ray Powder Diffraction

9.54(100),
4.78(20),
3.18(50),
2.759(20),
2.655(20),
2.53(70),
2.405(20),
2.212(20)
XRD chart Minnesotaite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Physical Properties

Hardness (Mohs)

2.75

VHN (Hardness Vickers)

68 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.01 (gemessen) 2.97 (berechnet)

3.113 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001} glimmerartig

(Co-)Type locality

(Co-)Type locality

USA/Minnesota/Crow Wing Co./Cuyuna North Range

USA/Minnesota/St. Louis Co./Mesabi Range/Drill Core M4450

Preface

Author (Name, Year)

Gruner, 1944

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 544

American Mineralogist 29 (1944), 363-372.

Canadian Mineralogist 24 (1986), 479-497

IMA group assignments

 
Pyrophyllite-Talc group
 
 
 

 
 
Ferripyrophyllite
Fe3+Si2O5(OH)
monoklin
C2/c

 
 
Minnesotaite
Fe2+3Si4O10(OH)2
triklin
P1

 
 
Pyrophyllite
Al2Si4O10(OH)2
monoklin
C2/c

 
 
Talc
Mg3Si4O10(OH)2
monoklin
C2/c

 
 
Willemseite
(Ni,Mg)3Si4O10(OH)2
monoklin
Cc

Refresh list

Actuality: 22. Mar 2023 - 12:16:19

Other languages

German

Minnesotait

French

Minnesotaite

English

Minnesotaite

Spanish

Minnesotaíta

Russian

Миннесотаит

Simplified Chinese

铁滑石

Alternative Name

Iron-Talc

CNMNC symbol

Symbol

Mns

Locations with GPS information