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Meionite

Pictures (27 Images total)

Mejonit
Views (File:
1265544650
): 2699
Mejonit
Größe: 2,85 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: Meionite
Image: 1265544650
Rating: 9.33 (votes: 3)
License: Usage for Mineralienatlas project only
Mejonit

Größe: 2,85 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2010-02-07
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Mejonit
Views (File:
1217759481
): 1502
Mejonit
Größe: 4 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, 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/Ercolano/San Vito/Steinbruch San Vito (Cava San Vito)
Mineral: Meionite
Image: 1217759481
Rating: 8.5 (votes: 2)
License: Usage for Mineralienatlas project only
Mejonit

Größe: 4 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel , Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2008-08-03
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Mejonit
Views (File:
1256804052
): 1861
Mejonit
Größe: 9,27 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: Meionite
Image: 1256804052
Rating: 9 (votes: 2)
License: Usage for Mineralienatlas project only
Mejonit

Größe: 9,27 mm; Fundort: Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2009-10-29
Locality: Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Mejonit
Views (File:
1217759730
): 1534, Rating: 8
Mejonit
Größe: 6,3 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, 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/Ercolano/San Vito/Steinbruch San Vito (Cava San Vito)
Mineral: Meionite
Image: 1217759730
Rating: 8 (votes: 5)
License: Usage for Mineralienatlas project only
Mejonit

Größe: 6,3 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel , Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2008-08-03
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Mejonit
Views (File:
1217759539
): 1458
Mejonit
Größe: 4 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, 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/Ercolano/San Vito/Steinbruch San Vito (Cava San Vito)
Mineral: Meionite
Image: 1217759539
Rating: 8 (votes: 3)
License: Usage for Mineralienatlas project only
Mejonit

Größe: 4 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel , Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2008-08-03
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Mejonit
Views (File:
1217759792
): 1344
Mejonit
Größe: 9,1 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, 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/Ercolano/San Vito/Steinbruch San Vito (Cava San Vito)
Mineral: Meionite
Image: 1217759792
Rating: 8.33 (votes: 3)
License: Usage for Mineralienatlas project only
Mejonit

Größe: 9,1 mm; Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel , Kampanien (Campania), Italien

Copyright: Matteo Chinellato
Contribution: Hg 2008-08-03
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 bläulich, bräunlich, farblos, violett, grünlich
Streak color farblos
Hardness (Mohs) 5.75
Cleavages {???} deutlich, {???} undeutlich
Solubility +++ HCl
Crystal System tetragonal, I4/m

Chemism

Chemical formula

Ca4Al6Si6O24CO3

Chemical composition

Aluminium, Calcium, Silicium, Kohlenstoff, Sauerstoff

Unit weight: 934.7113992 u; Number of atoms in the formula: 44

Info

Empirical formula:

Ca4Al6Si6O24CO3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Carbon

C

1.28

1

2.27

12.0107800

12.0107800

Oxygen

O

46.22

27

61.36

15.9994300

431.9846100

Aluminium

Al

17.32

6

13.64

26.9815382

161.8892292

Silicon

Si

18.03

6

13.64

28.0855300

168.5131800

Calcium

Ca

17.15

4

9.09

40.0784000

160.3136000

Analysis wt%

SiO2 : 40.80, Al2O3 : 30.60, Fe2O3 : 1.00, CaO : 22.10, Na2O : 2.40, CO2 : 3.10 (Ref: Hintze, Handbuch der Mineralogie, 1904-1974)

Strunz 9th edition incl. updates

9.FB.15

9: Silikate (Germanate)
F: Gerüstsilikate (Tektosilikate) ohne zeolithisches H2O
B: Gerüstsilikate (Tektosilicates) mit weiteren [Anionen]
15:

Lapis Classification

VIII/J.13-020

VIII: SILIKATE
J: Gerüstsilikate (mit Zeolithen)
13: Mit tetraederfremden Anionen; Skapolith-Reihe

Classification by Hölzel

9.FG.130

9: SILICATES
F: Tektosilicates
G: Scapolite-Group

Dana 8th edition

76.03.01.02

76: Tektosilicates Tectosilicate Al-Si Framework
03: Tektosilicates Tectosilicate Al-Si Framework with other Be/Al/Si frameworks
01: Scapolite group

IMA status

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

Mineral status

anerkanntes Mineral

Optical Properties

Color

bläulich, bräunlich, farblos, violett, grünlich

Streak color

farblos

Diaphaneity (Transparency)

transparent bis teilweise durchscheinend

max. Birefringence

0.034

Birefringence chart\! Meionite title=Birefringence chart Meionite

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

1.551

RI value γ / ε

1.585

Ri mean

1.562

2V angle

Uniaxial (+)

Optical Data Luminescence

Color LW-UV (365nm)

 

gelb

Color SW-UV (254nm)

 

gelb

SW-UV Intensity

stark

LW-UV Other Colors

 

rot

Most Common Activator

S2-

Other Activators

Fe3+, Eu2+, O2-

Afterglow (Persistant Luminescence)

keine Daten

Crystallography

Crystal System

tetragonal

Class (H-M)

4/m

Space Group number

87

Space Group

I4/m

Cell parameters a (Å)

12.169

Cell parameters b (Å)

-

Cell parameters c (Å)

7.569

Cell parameters a/b or c/a

0.622

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

2

Volume (ų)

1120.852

X-Ray Powder Diffraction

6.087(20),
3.846(40),
3.465(90),
3.085(70),
3.043(50),
2.700(100),
2.142(20),
1.923(30)

XRD chart Meionite

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)

5.75

Density (g/cm³)

2.66 - 2.73 / Durchschnittlich = 2.69

2.769 ( ρ calc. Mineralienatlas )

Cleavages

{???} deutlich, {???} undeutlich

Instability

+++ HCl

Preface

Author (Name, Year)

Haüy, 1801

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 530

Other languages

Spanish

Meionita

French

Meionite

English

Meionite

German

Mejonit

Russian

Мейонит

Simplified Chinese

钙柱石

Alternative Name

German

Meyonit

Spanish

Meyonita

Meyonite

German

Mizzonit

English

Mizzonite

German

Nuttalit

Spanish

Nuttalita

CNMNC symbol

Symbol

Me

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ruK2rOSuV0CwNb1niDdRdg
GUID (Global unique identifier) ACB6E2AE-AEE4-4057-B035-BD6788375176
Database ID 2448