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Manganhumite

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Manganhumit
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Manganhumit
rotbrauner Einschluss von Manganhumit in Calcit, Franklin, New Jersey, USA; BB ~ 1 cm, analysiert
Copyright: mintreasure.com; Contribution: openpit
Location: USA/New Jersey/Sussex Co./Franklin Mining District/Franklin
Mineral: Manganhumite
Image: 1662220565
License: Usage for Mineralienatlas project only
Manganhumit

rotbrauner Einschluss von Manganhumit in Calcit, Franklin, New Jersey, USA; BB 1 cm, analysiert
Copyright: mintreasure.com
Contribution: openpit 2022-09-03
Locality: Franklin / Franklin Mining District / Sussex Co. / New Jersey / USA

Collectors Summary

Color braun, braun orange, hellorange
Streak color weiß
Hardness (Mohs) 4
Solubility +++ warme verdünnte HCl
Crystal System orthorhombisch, Pbnm

Chemism

Chemical formula

(Mn,Mg)7(SiO4)3(OH)2

Chemical composition

Magnesium, Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 641.223120975 u; Number of atoms in the formula: 26

Info

Empirical formula:

(Mn0.75Mg0.25)7(SiO4)3(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.31

2

7.69

1.0079470

2.0158940
Oxygen

O

34.93

14

53.85

15.9994300

223.9920200
Magnesium

Mg

6.63

1.75

6.73

24.3050600

42.5338550
Silicon

Si

13.14

3

11.54

28.0855300

84.2565900
Manganese

Mn

44.98

5.25

20.19

54.9380499

288.4247620

Analysis wt%

SiO2 : 26.19, TiO2 : 0.41, FeO : 1.30, MnO : 68.87, MgO : 0.81, H2O : 1.84, F : 1.41 (Ref: American Mineralogist 83)

Strunz 9th edition incl. updates

9.AF.50

9: Silikate (Germanate)
A: Inselsilikate (Nesosilikate)
F: Insel(Neso)silikate mit zusätzlichem Anionen; Kationen in [4], [5] und/oder nur [6] Koordination
50:Humit-Gruppe

Lapis Classification

VIII/B.04-080

VIII: SILIKATE
B: Inselsilikate mit tetraederfremden Anionen
4: Kationen in tetraedrischer oder oktaedrischer Koordination [4/6]; Humit-Gruppe

Classification by Hölzel

9.AI.250

9: SILICATES
A: Nesosilicates
I: Nesosilicates with OH
2: Norbergite-Group

Dana 8th edition

52.03.02c.03

52: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
03: Nesosilicates Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
02c: Humite group (Humite series)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

braun, braun orange, hellorange

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.016
Birefringence chart\! Manganhumite title=Birefringence chart Manganhumite

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

1.707

RI value β

1.712

RI value γ / ε

1.723

Ri mean

1.714

2V angle

Biaxial (+) 37°

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pbnm

Cell parameters a (Å)

4.822

Cell parameters b (Å)

10.54

Cell parameters c (Å)

21.45

Cell parameters a/b or c/a

0.457

Cell parameters c/b

2.035

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

1090.172

X-Ray Powder Diffraction

3.719(50),
3.371(60),
2.813(50),
2.752(50),
2.628(60),
2.500(70),
2.310(50),
1.777(100)
XRD chart Manganhumite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

4

VHN (Hardness Vickers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.83

3.907 ( ρ calc. Mineralienatlas )

Instability

+++ warme verdünnte HCl

(Co-)Type locality

(Co-)Type locality

Schweden/Värmland, Provinz/Filipstad, Gemeinde/Nordmark (Nordmarksberg)/Brattfors Gruvan

Preface

Author (Name, Year)

Moore, 1978

References

Mineralogical Magazine 42 (1978), 133

Other languages

German

Manganhumit

Spanish

Manganhumita

English

Manganhumite

French

Manganhumite

Russian

Мангангумит

Simplified Chinese

锰硅镁石

Alternative Name

French

Manganesesepiolite

CNMNC (IMA)-Number

IMA 1969-021

CNMNC symbol

Symbol

Mnhu

Locations with GPS information

IDs

GUSID (Global unique identifier short form) eMM0pwKcvE-3IVlHaohw9g
GUID (Global unique identifier) A734C378-9C02-4FBC-B721-59476A8870F6
Database ID 2361