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Manganhumite

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

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

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

German pages

DeWikiPedia - search for: Manganhumit
Google-Bilder-Suche - search for: Manganhumit
Mineralienatlas.de (Forum) - search for: Manganhumit

English pages

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

Russian pages

Webmineral.ru - search for: Мангангумит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Manganhumit
Crystal-Treasure.com - search for: Manganhumit
Bosse - search for: Manganhumit
Edelsteine Neuburg - Gundolf Fischer - search for: Manganhumit

Locations with GPS information