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Marokite

Pictures (3 Images total)

Marokit
Views (Image: 1322086385): 1443
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 (Image: 1446980670): 890
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 / Mayen / Mayen-Koblenz-Kreis / Rheinland-Pfalz / Deutschland
Marokit von der Tachgagalt Mine, Marokko
Views (Image: 1608019331): 178
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

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

Volumne (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

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

Marokite

CaMn23+O4

orthorhombisch : mmm, mm2 : Pmab, P21ab

4.BC.05

Ellinaite

CaCr2O4

orthorhombisch : mmm : Pnma

4.BC.05

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

Hausmannite

Mn2+Mn23+O4

tetragonal : 4/mmm : I41/amd

IV/B.05-010

Iwakiite

Mn2+(Fe3+,Mn3+)2O4

tetragonal : 4/mmm : I41/amd

IV/B.05-020

Xieite

FeCr2O4

orthorhombisch : mmm : Bbmm

IV/B.05-025

Hetaerolite

ZnMn23+O4

tetragonal : 4/mmm : I41/amd

IV/B.05-040

'Hydrohetaerolite'

HZnMn3+1.7O4

tetragonal : 4/mmm : I41/amd

IV/B.05-050

Harmunite

CaFe2O4

orthorhombisch : mmm : Pnma

IV/B.05-058

Marokite

CaMn23+O4

orthorhombisch : mmm, mm2 : Pmab, P21ab

IV/B.05-060

Tegengrenite

(Mg,Mn2+)2(Sb5+,Mn3+)O4

trigonal : 3, 3 : R3, R3

IV/B.05-065

Filipstadite

(Mn2+,Mg)2(Fe3+0.5Sb5+0.5)O4

kubisch : m3m : Fd3m

IV/B.05-070

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

Hetaerolite

ZnMn23+O4

tetragonal : 4/mmm : I41/amd

4.BE.100

'Hydrohetaerolite'

HZnMn3+1.7O4

tetragonal : 4/mmm : I41/amd

4.BE.105

Hausmannite

Mn2+Mn23+O4

tetragonal : 4/mmm : I41/amd

4.BE.150

Iwakiite

Mn2+(Fe3+,Mn3+)2O4

tetragonal : 4/mmm : I41/amd

4.BE.170

Marokite

CaMn23+O4

orthorhombisch : mmm, mm2 : Pmab, P21ab

4.BE.190

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Marokite

CaMn23+O4

orthorhombisch : mmm, mm2 : Pmab, P21ab

07.02.10.01

Magnesiotaaffeite-6N'3S

(Mg,Fe2+,Zn)2Al6BeO12

trigonal : 3m : R3m

07.02.12.01

Filipstadite

(Mn2+,Mg)2(Fe3+0.5Sb5+0.5)O4

kubisch : m3m : Fd3m

07.02.13.01

Tegengrenite

(Mg,Mn2+)2(Sb5+,Mn3+)O4

trigonal : 3, 3 : R3, R3

07.02.13.02

Yafsoanite

Ca3Te6+2Zn3O12

kubisch : m3m : Ia3d

07.02.14.01

CNMNC (IMA)-Number

IMA 1963-005

CNMNC symbol

Symbol

Mro

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Марокит

Mineral Dealer

German pages

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

Locations with GPS information