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Meionite

Pictures (23 Images total)

Mejonit
Views (Image: 1265544650): 2588
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 (Image: 1217759481): 1441
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 (Image: 1256804052): 1797
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 (Image: 1217759730): 1467, 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 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 (Image: 1217759539): 1401
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 (Image: 1217759792): 1299
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

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

Volumne (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

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Мейонит

Mineral Dealer

German pages

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Locations with GPS information