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Marokite (Marokit)

Pictures (3 Images total)

Marokit
Views (File:
1322086385
): 1639
Marokit
Größe: 77x50 mm; Fundort: Tachgagalt Mine, Provinz Ouarzazate, Region Souss-Massa-Draa, Marokko
Copyright: Rock Currier; Contribution: slugslayer
Collection: National Museum of Natural History (Smithsonian Institution)
Location: Marokko/Drâa-Tafilalet, Region/Zagora, Provinz/Agdz, Cercle/Tachgagalt/Tachgagalt Mine
Mineral: Marokite
Image: 1322086385
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Marokit

Größe: 77x50 mm; Fundort: Tachgagalt Mine, Provinz Ouarzazate, Region Souss-Massa-Draa, Marokko

Collection: National Museum of Natural History (Smithsonian Institution)
Copyright: Rock Currier
Contribution: slugslayer 2011-11-23
Locality: Tachgagalt Mine / Tachgagalt / Agdz, Cercle / Zagora, Provinz / Drâa-Tafilalet, Region / Marokko
Marokit
Views (File:
1446980670
): 1053
Marokit
winzige dunkelbraune tafelige Kristalle vom Ettringer Bellerberg, zusammen mit Gaudefroyit, BB = 0,5 mm, Analyse Dr. Nikita Chukanov
Copyright: Matthias Reinhardt; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A036963, Donator: Horst Geuer
Location: Deutschland/Rheinland-Pfalz/Mayen-Koblenz-Kreis/Vordereifel, Verbandsgemeinde/Ettringen/Bellerberg/Ettringer Bellerberg (Stbr. Caspar)
Mineral: Marokite
Image: 1446980670
Rating: 5 (votes: 1)
License: Usage for Mineralienatlas project only
Marokit (SNr: A036963)

winzige dunkelbraune tafelige Kristalle vom Ettringer Bellerberg, zusammen mit Gaudefroyit, BB = 0,5 mm, Analyse Dr. Nikita Chukanov

Collection: Lithothek der Münchener Micromounter
Copyright: Matthias Reinhardt
Contribution: Münchener Micromounter 2015-11-08
Locality: Ettringer Bellerberg (Stbr. Caspar) / Bellerberg / Ettringen / Vordereifel, Verbandsgemeinde / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Marokit von der Tachgagalt Mine, Marokko
Views (File:
1608019331
): 295
Marokit von der Tachgagalt Mine, Marokko
Bildbreite ca. 10mm.
Copyright: prospector56; Contribution: prospector56
Collection: prospector56, Collection number: D4F11
Location: Marokko/Drâa-Tafilalet, Region/Zagora, Provinz/Agdz, Cercle/Tachgagalt/Tachgagalt Mine
Mineral: Marokite
Image: 1608019331
License: Usage for Mineralienatlas project only
Marokit von der Tachgagalt Mine, Marokko (SNr: D4F11)

Bildbreite ca. 10mm.

Collection: prospector56
Copyright: prospector56
Contribution: prospector56 2020-12-15
Locality: Tachgagalt Mine / Tachgagalt / Agdz, Cercle / Zagora, Provinz / Drâa-Tafilalet, Region / Marokko

You find additional specimen at the Geolitho Museum

Collectors Summary

Color hellgrau bis braun, mit karminroten internen Reflektionen
Streak color rot braun
Hardness (Mohs) 6.75
Solubility +++ HCl
Crystal System orthorhombisch, Pmab, P21ab

Chemism

Chemical formula

CaMn23+O4

Chemical composition

Calcium, Mangan, Sauerstoff

Unit weight: 213.9522198 u; Number of atoms in the formula: 7

Info

Empirical formula:

CaMn2O4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

29.91

4

57.14

15.9994300

63.9977200

Calcium

Ca

18.73

1

14.29

40.0784000

40.0784000

Manganese

Mn

51.36

2

28.57

54.9380499

109.8760998

Analysis wt%

MnO2 : 38.94, MnO : 31.38, CaO : 25.60, Fe2O3 : 1.60, SiO2 : 0.62, CO2 : 0.52 (Ref: Bulletin de Mineralogie 63)

Strunz 9th edition incl. updates

4.BC.05

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
B: Metall: Sauerstoff = 3:4 und vergleichbare
C: Mit mittelgroßen und großen [Kationen]
05:Marokit-Gruppe

Lapis Classification

IV/B.05-060

IV: OXIDE
B: Oxide mit Verhältnis Metall zu Sauerstoff = 3:4 (Spinelltyp M3O4 und verwandte Verbindungen)

Classification by Hölzel

4.BE.190

4: OXIDES
B: Spinels R3O4
E: Mn-Spinels

Dana 8th edition

07.02.10.01

07: Multiple Oxides
02: Multiple Oxides (A+ B++)2 X4 Spinel group

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Marokite supergroup

Optical Properties

Color

hellgrau bis braun, mit karminroten internen Reflektionen

Streak color

rot braun

Diaphaneity (Transparency)

opak

max. Birefringence

0.32

Birefringence chart\! Marokite title=Birefringence chart Marokite

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

2.10

RI value β

2.42

RI value γ / ε

2.42

Ri mean

2.313

2V angle

Biaxial (-) 23°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm, mm2

Space Group number

57, 29

Space Group

Pmab, P21ab

Cell parameters a (Å)

9.71

Cell parameters b (Å)

10.03

Cell parameters c (Å)

3.162

Cell parameters a/b or c/a

0.968

Cell parameters c/b

0.315

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

307.951

X-Ray Powder Diffraction

2.87(50),
2.71(100),
2.56(50),
2.29(80),
2.22(100),
2.07(80),
1.63(50),
1.58(50)

XRD chart Marokite

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)

6.75

VHN (Hardness Vickers)

1040 (100g)

Density (g/cm³)

4.64

4.614 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

Marokko/Drâa-Tafilalet, Region/Zagora, Provinz/Agdz, Cercle/Tachgagalt/Tachgagalt Mine

Type material

Geowissenschaftliche Sammlungen des GZG, Göttingen

Collection number of type material

GZG.MIN.o.Nr. / UG023-025-Typusschränke Minerale

Preface

Name from

Typlokalität

Author (Name, Year)

Gaudefroy & Jouravsky & Permingeat, 1963

References

Bulletin de la Société Française Minéralogie et de Cristallographie 86 (1963), 359

IMA group assignments

Other languages

German

Marokit

Spanish

Marokita

English

Marokite

French

Marokite

Russian

Марокит

Japanese

マロカイト

CNMNC (IMA)-Number

IMA 1963-005

CNMNC symbol

Symbol

Mro

Locations with GPS information

IDs

GUSID (Global unique identifier short form) kO8Dw_n_xUmnrYLLW36JBg
GUID (Global unique identifier) C303EF90-FFF9-49C5-A7AD-82CB5B7E8906
Database ID 2397