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Manjiroite

Pictures (4 Images total)

Manjiroit
Views (File:
1321799287
): 1061
Manjiroit
Bildbreite: 5,1 mm, Fundort: Tombstone, Tombstone District, Cochise Co., Arizona, USA
Copyright: Enrico Bonacina; Contribution: Hg
Location: USA/Arizona/Cochise County/Tombstone District/Tombstone
Mineral: Manjiroite
Image: 1321799287
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Manjiroit

Bildbreite: 5,1 mm, Fundort: Tombstone, Tombstone District, Cochise Co., Arizona, USA
Copyright: Enrico Bonacina
Contribution: Hg 2011-11-20
Locality: Tombstone / Tombstone District / Cochise County / Arizona / USA
Manjiroit
Views (File:
1264103093
): 1034
Manjiroit
Größe: 60x50 mm; Fundort: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, Südafrika
Copyright: Paul Bongaerts; Contribution: Philip Blümner
Location: Südafrika/Nordkap (Northern Cape), Provinz/Kalahari Manganese Field/Kuruman/N'Chwaning Mines (NChwaning Mines)
Mineral: Manjiroite
Image: 1264103093
License: Usage for Mineralienatlas project only
Manjiroit

Größe: 60x50 mm; Fundort: N'Chwaning Mine, Kalahari Manganese Field, Northern Cape Province, Südafrika
Copyright: Paul Bongaerts
Contribution: Philip Blümner 2010-01-21
Locality: N'Chwaning Mines (NChwaning Mines) / Kuruman / Kalahari Manganese Field / Nordkap (Northern Cape), Provinz / Südafrika
Manjiroit
Views (File:
1463660706
): 510
Manjiroit
von der Prompter Mine bei Tombstone im Cochise Co. von Arizona, USA; faserige schwärzliche Kristalle; BB= 6mm
Copyright: Manfred Früchtl; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A000139, Donator: Klaus Fleck
Location: USA/Arizona/Cochise County/Tombstone District/Oregon-Prompter Mine Group/Prompter Mine
Mineral: Manjiroite
Image: 1463660706
License: Usage for Mineralienatlas project only
Manjiroit (SNr: A000139)

von der Prompter Mine bei Tombstone im Cochise Co. von Arizona, USA; faserige schwärzliche Kristalle; BB= 6mm
Collection: Lithothek der Münchener Micromounter
Copyright: Manfred Früchtl
Contribution: Münchener Micromounter 2016-05-19
Locality: Prompter Mine / Oregon-Prompter Mine Group / Tombstone District / Cochise County / Arizona / USA
Manjiroit, Calcit
Views (File:
1699875563
): 51
Manjiroit, Calcit
Etwa 50 mm x 31 mm große Stufe mit schwarzem Manjiroit und Calcit von der Hotazel Mine im Kalahari Manganese Field, Südafrika.
Copyright: Klaus Schäfer; Contribution: Klaus Schäfer
Collection: Klaus Schäfer, Collection number: KMF-Manj-3-1-1
Location: Südafrika/Nordkap (Northern Cape), Provinz/Kalahari Manganese Field/Hotazel/Hotazel Mine
Mineral: Manjiroite
Image: 1699875563
License: Usage for Mineralienatlas project only
Manjiroit, Calcit (SNr: KMF-Manj-3-1-1)

Etwa 50 mm x 31 mm große Stufe mit schwarzem Manjiroit und Calcit von der Hotazel Mine im Kalahari Manganese Field, Südafrika.
Collection: Klaus Schäfer
Copyright: Klaus Schäfer
Contribution: Klaus Schäfer 2023-11-13
Locality: Hotazel Mine / Hotazel / Kalahari Manganese Field / Nordkap (Northern Cape), Provinz / Südafrika

You find additional specimen at the Geolitho Museum

Collectors Summary

Color bräunlich grau, grau braun, dunkelbraun grau
Streak color bräunlichschwarz
Hardness (Mohs) 4
Solubility +++ HCl
Crystal System tetragonal, I4/m

Chemism

Chemical formula

Na(Mn4+7Mn3+)O16

Chemical composition

Mangan, Natrium, Sauerstoff

Unit weight: 718.4850494 u; Number of atoms in the formula: 25

Info

Empirical formula:

Na(Mn7Mn)O16

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

35.63

16

64.00

15.9994300

255.9908800
Sodium

Na

3.20

1

4.00

22.9897702

22.9897702
Manganese

Mn

61.17

8

32.00

54.9380499

439.5043992

Analysis wt%

MnO2 : 85.79, MnO : 3.18, Fe2O3 : 0.40, Al2O3 : 0.62, Na2O : 2.99, K2O : 1.39, H2O : 4.60 (Ref: American Mineralogist 68)

Strunz 9th edition incl. updates

4.DK.05a

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
K: Mit großen (± mittelgroßen) [Kationen]; Tunnelstrukturen
05a:Coronadit-Gruppe

Lapis Classification

IV/D.08-010

IV: OXIDE
D: Oxide mit Verhältnis Metall : Sauerstoff = 1:2 (MO2 und verwandte Verbindungen)
8: Kryptomelan-Gruppe

Classification by Hölzel

4.DE.130

4: OXIDES
D: Dioxides
E: Pyrolusite-Group

Dana 8th edition

07.09.01.03

07: Multiple Oxides
09: Multiple Oxides
01: Cryptomelane Group (Hard black, fine-grained)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Hollandite supergroup  ⇒ Coronadite group

Optical Properties

Color

bräunlich grau, grau braun, dunkelbraun grau

Streak color

bräunlichschwarz

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

tetragonal

Class (H-M)

4/m

Space Group number

87

Space Group

I4/m

Cell parameters a (Å)

9.916

Cell parameters b (Å)

-

Cell parameters c (Å)

2.864

Cell parameters a/b or c/a

0.289

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

1

Volume (ų)

281.609

X-Ray Powder Diffraction

7.017(100),
4.941(80),
3.136(90),
2.406(100),
2.160(70),
1.839(50),
1.548(50)
XRD chart Manjiroite

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

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

181

Density (g/cm³)

4.29

4.236 ( ρ calc. Mineralienatlas )

Instability

+++ HCl

(Co-)Type locality

(Co-)Type locality

Japan/Honshū (Honschu), Insel/Tōhoku (Tohoku), Region/Iwate, Präfektur/Kohare Mine

Preface

Author (Name, Year)

Nambu & Tanida, 1967

References

Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists 58 (1967), 39

European Journal of Mineralogy Volume 25 Number 1 (2013), p. 85 - 90

IMA group assignments

Other languages

German

Manjiroit

English

Manjiroite

French

Manjiroite

Spanish

Manjiroíta

Russian

Манжироит

Alternative Name

Japanese

万次郎鉱

CNMNC (IMA)-Number

IMA 1966-009

CNMNC symbol

Symbol

Mji

Locations with GPS information

IDs

GUSID (Global unique identifier short form) TAkEmFuD30mfPaYd5JHFRw
GUID (Global unique identifier) 9804094C-835B-49DF-9F3D-A61DE491C547
Database ID 2383