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Humite

Pictures (44 Images total)

Humit
Views (File:
1257176943
): 2539, Rating: 9.6
Humit
Größe: 4,54 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma/Ercolano/San Vito/Steinbruch San Vito (Cava San Vito)
Mineral: Humite
Image: 1257176943
Rating: 9.6 (votes: 5)
License: Usage for Mineralienatlas project only
Humit

Größe: 4,54 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien
Copyright: Matteo Chinellato
Contribution: Hg 2009-11-02
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Humit
Views (File:
1272356864
): 2373
Humit
Größe: 1,9 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma
Mineral: Humite
Image: 1272356864
Rating: 9.67 (votes: 3)
License: Usage for Mineralienatlas project only
Humit

Größe: 1,9 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien
Copyright: Matteo Chinellato
Contribution: Hg 2010-04-27
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Humit
Views (File:
1256630506
): 2505
Humit
Größe: 2,47 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma
Mineral: Humite
Image: 1256630506
Rating: 10 (votes: 2)
License: Usage for Mineralienatlas project only
Humit

Größe: 2,47 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien
Copyright: Matteo Chinellato
Contribution: Hg 2009-10-27
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Humit
Views (File:
1303725075
): 516
Humit
Größe: 1,06 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma
Mineral: Humite
Image: 1303725075
Rating: 9.5 (votes: 2)
License: Usage for Mineralienatlas project only
Humit

Größe: 1,06 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien
Copyright: Matteo Chinellato
Contribution: Hg 2011-04-25
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Humit
Views (File:
1395389404
): 1876
Humit
Größe: 1,45 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien
Copyright: Matteo Chinellato; Contribution: Hg
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma/Ercolano/San Vito/Steinbruch San Vito (Cava San Vito)
Mineral: Humite
Image: 1395389404
Rating: 10 (votes: 2)
License: Usage for Mineralienatlas project only
Humit

Größe: 1,45 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien
Copyright: Matteo Chinellato
Contribution: Hg 2014-03-21
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien

You find additional specimen at the Geolitho Museum

Collectors Summary

Color braun, gelb, weiß, dunkel orange
Streak color weiß
Hardness (Mohs) 6
Solubility +++ HF, konz. warme H2SO4, + andere Säuren
Crystal System orthorhombisch, Pbnm

Chemism

Chemical formula

Mg7(SiO4)3(F,OH)2

Chemical composition

Magnesium, Silicium, Fluor, Sauerstoff, Wasserstoff

Unit weight: 483.386463375 u; Number of atoms in the formula: 24.5

Info

Empirical formula:

Mg7(SiO4)3(F0.75(OH)0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.10

0.5

2.04

1.0079470

0.5039735
Oxygen

O

41.37

12.5

51.02

15.9994300

199.9928750
Fluorine

F

5.90

1.5

6.12

18.9984033

28.4976049
Magnesium

Mg

35.20

7

28.57

24.3050600

170.1354200
Silicon

Si

17.43

3

12.24

28.0855300

84.2565900

Analysis wt%

SiO2 : 36.43, FeO : 5.03, MnO : 0.65, MgO : 53.84, H2O : 1.69, F : 4.07 (Ref: American Mineralogist 71)

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.04-030

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

Classification by Hölzel

9.AI.240

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

Dana 8th edition

52.03.02c.01

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

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

 Humite polysomatic series

Optical Properties

Color

braun, gelb, weiß, dunkel orange

Streak color

weiß

Diaphaneity (Transparency)

transparent bis durchscheinend

max. Birefringence

0.029
Birefringence chart\! Humite title=Birefringence chart Humite

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

1.624

RI value β

1.633

RI value γ / ε

1.653

Ri mean

1.637

2V angle

Biaxial (+) 66°!

Optical Data Luminescence

Color SW-UV (254nm)

  

gelb

SW-UV Intensity

stark

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pbnm

Cell parameters a (Å)

20.86

Cell parameters b (Å)

4.74

Cell parameters c (Å)

10.23

Cell parameters a/b or c/a

4.401

Cell parameters c/b

2.158

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volume (ų)

1011.506

X-Ray Powder Diffraction

3.64(50),
2.691(50),
2.572(40),
2.438(70),
2.256(100),
2.107(40),
1.739(60),
1.479(70)
XRD chart Humite

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

VHN (Hardness Vickers)

730 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.1 - 3.2 / Durchschnittlich = 3.15

3.174 ( ρ calc. Mineralienatlas )

Instability

+++ HF, konz. warme H2SO4, + andere Säuren

(Co-)Type locality

(Co-)Type locality

Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma

Preface

Author (Name, Year)

Bournon, 1813

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 351

IMA group assignments

 
Humite polysomatic series
 
 
 

 
 
Chondrodite
Mg5(SiO4)2F2
monoklin
P21/a

 
 
Clinohumite
Mg9(SiO4)4F2
monoklin
P21/a

 
 
Humite
Mg7(SiO4)3(F,OH)2
orthorhombisch
Pbnm

 
 
Hydroxylchondrodite
Mg5(SiO4)2(OH)2
monoklin
P21/c

 
 
Hydroxylclinohumite
Mg9(SiO4)4(OH)2
monoklin
P21/a

 
 
Norbergite
Mg3(SiO4)F2
orthorhombisch
Pnam

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Actuality: 01. Dec 2024 - 05:13:05

Other languages

German

Humit

Spanish

Humita

French

Humite

English

Humite

Russian

Гумит

Simplified Chinese

硅镁石

Alternative Name

Umit

Umita

Umite

CNMNC symbol

Symbol

Hu

Locations with GPS information

IDs

GUSID (Global unique identifier short form) JLfl-Rr6_kWlOMWrPjU1EQ
GUID (Global unique identifier) F9E5B724-FA1A-45FE-A538-C5AB3E353511
Database ID 1644