'._('einklappen').'
 

Iowaite (Iowait)

Pictures (2 Images total)

Iowait
Views (Image: 1136565405): 1174
Iowait

Fundort: Palabora mine, Limpopo Province, Süd-Afrika

Copyright: Stephan Wolfsried
Contribution: JHM 2006-01-06
Locality: Palabora Mine / Loolekop / Phalaborwa / Mopani, Distrikt / Limpopo, Provinz / Südafrika
Iowait
Views (Image: 1217485108): 1167
Iowait

Bildbreite: 15 mm; Fundort: Palabora, Loolekop, Südafrika

Copyright: Leonardus
Contribution: slugslayer 2008-07-31
Locality: Palabora Mine / Loolekop / Phalaborwa / Mopani, Distrikt / Limpopo, Provinz / Südafrika

Collectors Summary

Hardness (Mohs) 2.5
Solubility +++ Säuren
Crystal System trigonal, R3m

Chemism

Chemical formula

Mg6Fe3+2(OH)16Cl2·4H2O

Chemical composition

Chlor, Eisen, Magnesium, Sauerstoff, Wasserstoff

Unit weight: 672.606488 u; Number of atoms in the formula: 54

Info

Empirical formula:

Mg6Fe2(OH)16Cl2·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

3.60

24

44.44

1.0079470

24.1907280

Oxygen

O

47.57

20

37.04

15.9994300

319.9886000

Magnesium

Mg

21.68

6

11.11

24.3050600

145.8303600

Chlorine

Cl

10.54

2

3.70

35.4532000

70.9064000

Iron

Fe

16.61

2

3.70

55.8452000

111.6904000

Analysis wt%

MgO : 35.69, FeO : 1.08, Fe2O3 : 23.97, Cl : 7.45, CO2 : 0.40, H2O : 33.10 (Ref: Mineralogical Magazine 94)

Strunz 9th edition incl. updates

4.FL.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
F: Hydroxide (ohne V oder U)
L: Hydroxide mit H2O ± (OH); Lagen kantenverknüpfter Oktaeder
05:Meixnerit-Gruppe

Lapis Classification

IV/F.05-020

IV: OXIDE
F: Hydroxide und oxidische Hydrate (wasserhaltige Oxide mit Schichtstruktur)

Classification by Hölzel

5.DD.530

5: CARBONATES NITRATES ARSENITES SULFITES SELENITES TELLURITES IODATES
D: Carbonates (+Anions +Water)
D: Hydrotalcite Series
5: Pyroaurite-Group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Hydrotalcite Supergroup  ⇒ Hydrotalcite Group

Optical Properties

max. Birefringence

0.010

Birefringence chart\! Iowaite title=Birefringence chart Iowaite

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

1.543

RI value γ / ε

1.533

Ri mean

1.540

2V angle

Uniaxial (-)

Crystallography

Crystal System

trigonal

Class (H-M)

3m

Space Group number

166

Space Group

R3m

Cell parameters a (Å)

3.118

Cell parameters b (Å)

-

Cell parameters c (Å)

24.113

Cell parameters a/b or c/a

7.733

Cell parameters c/b

-

Z

0.375

Volumne (ų)

203.018

X-Ray Powder Diffraction

7.90(100),
3.943(40),
2.625(40),
2.341(40),
1.987(40),
1.566(10),
1.524(10),
1.291(10)

XRD chart Iowaite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.5

Density (g/cm³)

2.09 (gemessen)

2.063 ( ρ calc. Mineralienatlas )

Instability

+++ Säuren

(Co-)Type locality

(Co-)Type locality

USA/Iowa/Sioux Co.

Preface

Author (Name, Year)

Kohls & Rodda, 1967

References

Handbook of Mineralogy (Anthony et al.), 3 (1997), 269

IMA group assignments

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Iowaite

Mg6Fe3+2(OH)16Cl2·4H2O

trigonal : 3m : R3m

4.FL.05

Jamborite

Ni2+1-xCo3+x(OH)2-x(SO4)x·nH2O

trigonal : 3m : R3m

4.FL.05

Meixnerite

Mg6Al2(OH)18·4H2O

trigonal : 3m : R3m

4.FL.05

Muskoxite

Mg7Fe43+O13·10 H2O

4.FL.05

Woodallite

Mg6(Cr,Fe3+)2(OH)16Cl2·4H2O

trigonal : 3m : R3m

4.FL.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Chlormagaluminite

(Mg,Fe2+)4Al2(OH)12(Cl2,CO3)·2H2O

hexagonal : 6m2 : P6c2

IV/F.05-005

Meixnerite

Mg6Al2(OH)18·4H2O

trigonal : 3m : R3m

IV/F.05-010

Fougèrite

Fe2+6Fe3+2(OH)16CO3·3H2O

trigonal : 3m : R3m

IV/F.05-012

Woodallite

Mg6(Cr,Fe3+)2(OH)16Cl2·4H2O

trigonal : 3m : R3m

IV/F.05-015

Iowaite

Mg6Fe3+2(OH)16Cl2·4H2O

trigonal : 3m : R3m

IV/F.05-020

Droninoite

Ni6Fe3+2Cl2(OH)16·4H2O

trigonal : 3m : R3m

IV/F.05-025

Muskoxite

Mg7Fe43+O13·10 H2O

IV/F.05-030

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Hydrotalcite

Mg6Al2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.500

Pyroaurite-3R

Mg6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.520

Iowaite

Mg6Fe3+2(OH)16Cl2·4H2O

trigonal : 3m : R3m

5.DD.530

Woodallite

Mg6(Cr,Fe3+)2(OH)16Cl2·4H2O

trigonal : 3m : R3m

5.DD.535

Stichtite

Mg6Cr2(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.540

Reevesite

Ni6Fe23+(CO3)(OH)16·4H2O

trigonal : 3m : R3m

5.DD.580

Droninoite

Ni6Fe3+2Cl2(OH)16·4H2O

trigonal : 3m : R3m

5.DD.583

Other languages

German

Iowait

French

Iowaite

English

Iowaite

Spanish

Iowaíta

Russian

Айоваит

IMA Number

IMA 1967-002

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Iowait
Google-Bilder-Suche - search for: Iowait
Mineralogisch-Petrographisches-Institut Hamburg - search for: Iowait

English pages

Mindat - search for: Iowaite
Webmineral - search for:Iowaite
Handbook-of-Mineralogy - search for: Iowaite
RRUFF - Raman, XRD and other mineral data - search for: Iowaite
RRUFF - References and PDF downloads - search for: Iowaite
American-Mineralogist-Crystal-Structure-Database - search for: Iowaite
Athena - search for: Iowaite

Russian pages

Webmineral.ru - search for: Айоваит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Iowait
Crystal-Treasure.com - search for: Iowait
Bosse - search for: Iowait

Locations with GPS information




Notice: "Undefined variable: ub"