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Omphacite

Pictures (17 Images total)

Omphacit (geschliffen)
Views (File:
1691852504
): 58
Omphacit (geschliffen)
Italien.
Copyright: Doc Diether; Contribution: Doc Diether
Collection: Mineralientage München 2013
Location: Italien
Mineral: Omphacite
Image: 1691852504
Rating: 9 (votes: 1)
License: Usage for Mineralienatlas project only
Omphacit (geschliffen)  D

Italien.

Collection: Mineralientage München 2013
Copyright: Doc Diether
Contribution: Doc Diether 2023-08-12
Locality: Italien
Großer Omphacit in Eklogit vom Großvenediger
Views (File:
1601417881
): 4091
Großer Omphacit in Eklogit vom Großvenediger
Österreich/Tirol/Lienz, Bezirk (Osttirol)/Prägraten/Dorfertal/Gumpachkreuz
Copyright: A. Seute; Contribution: Akkuama
Location: Österreich/Tirol/Lienz, Bezirk (Osttirol)/Prägraten/Dorfertal/Gumpachkreuz
Mineral: Omphacite
Rock: eclogite
Image: 1601417881
Rating: 8 (votes: 1)
License: Creative Commons - Attribution (CC-BY) V.3.0
Großer Omphacit in Eklogit vom Großvenediger

Österreich/Tirol/Lienz, Bezirk (Osttirol)/Prägraten/Dorfertal/Gumpachkreuz

Copyright: A. Seute
Contribution: Akkuama 2020-09-29
Locality: Gumpachkreuz / Dorfertal / Prägraten / Lienz, Bezirk (Osttirol) / Tirol / Österreich
Smaragdit (Omphacit-Saussurit-Gabbro)
Views (File:
1342850234
): 17201
Smaragdit (Omphacit-Saussurit-Gabbro)
Allalin-Gletscher, Saas-Almagel, Saas-Fee, Wallis, Schweiz. B:9cm.
Copyright: Doc Diether; Contribution: Doc Diether
Collection: Doc Diether
Location: Schweiz/Wallis, Kanton/Visp/Zermatt-Saas-Fee-Gebiet/Saastal/Saas-Almagell/Allalin-Gletscher
Mineral: Omphacite, Smaragdite
Rock: Allalin Metagabbro
Image: 1342850234
Rating: 4 (votes: 1)
License: Usage for Mineralienatlas project only
Smaragdit (Omphacit-Saussurit-Gabbro)  D

Allalin-Gletscher, Saas-Almagel, Saas-Fee, Wallis, Schweiz. B:9cm.

Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2012-07-21
Locality: Allalin-Gletscher / Saas-Almagell / Saastal / Zermatt-Saas-Fee-Gebiet / Visp / Wallis, Kanton / Schweiz
Omphacit
Views (File:
1105876454
): 12325
Omphacit
Grüne derbe Massen mit rotem Pyrop-Granat in Eklogit-Gestein; Stufengröße: 4 x 3,5 cm; Fundort: Äheim bei Lom, Norwegen
Copyright: McSchuerf; Contribution: Mineralienatlas
Location: Norwegen/Møre og Romsdal, Provinz/Vanylven/Almklovdalen/Aheim
Mineral: Omphacite
Rock: eclogite
Image: 1105876454
License: Usage for Mineralienatlas project only
Omphacit

Grüne derbe Massen mit rotem Pyrop-Granat in Eklogit-Gestein; Stufengröße: 4 x 3,5 cm; Fundort: Äheim bei Lom, Norwegen

Copyright: McSchuerf
Contribution: Mineralienatlas 2005-01-16
Locality: Aheim / Almklovdalen / Vanylven / Møre og Romsdal, Provinz / Norwegen
Omphacit
Views (File:
1331724013
): 9537
Omphacit
Grüner, grobkristalliner Omphacit mit eingeschlossenen Almandin/Pyrop-Mischkristallen. Knapp 4 cm breite Stufe von Silberbach, Hof, Oberfranken, Bayern, Deutschland. Mit Originaletikett der BA Freiberg (um 1940).
Copyright: raritätenjäger; Contribution: raritätenjäger
Collection: raritätenjäger
Location: Deutschland/Bayern/Oberfranken, Bezirk/Hof, Landkreis/Konradsreuth/Silberbach
Mineral: Omphacite
Rock: eclogite
Image: 1331724013
License: Usage for Mineralienatlas project only
Omphacit

Grüner, grobkristalliner Omphacit mit eingeschlossenen Almandin/Pyrop-Mischkristallen. Knapp 4 cm breite Stufe von Silberbach, Hof, Oberfranken, Bayern, Deutschland. Mit Originaletikett der BA Frei...

Collection: raritätenjäger
Copyright: raritätenjäger
Contribution: raritätenjäger 2012-03-14
Locality: Silberbach / Konradsreuth / Hof, Landkreis / Oberfranken, Bezirk / Bayern / Deutschland

You find additional specimen at the Geolitho Museum

Collectors Summary

Color grasgrün, dunkelgrün
Streak color grünlichweiß
Hardness (Mohs) 5.5
Solubility - HCl
Crystal System monoklin, C2/c, P2/n

Chemism

Chemical formula

(Ca,Na)(Mg,Fe2+,Fe3+,Al)Si2O6

Chemical composition

Aluminium, Calcium, Eisen, Magnesium, Natrium, Silicium, Sauerstoff

Unit weight: 225.02882246 u; Number of atoms in the formula: 10

Info

Empirical formula:

(Ca0.75Na0.25)(Mg0.55Fe0.3Fe0.1Al0.05)Si2O6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

42.66

6

60.00

15.9994300

95.9965800

Sodium

Na

2.55

0.25

2.50

22.9897702

5.7474426

Magnesium

Mg

5.94

0.55

5.50

24.3050600

13.3677830

Aluminium

Al

0.60

0.05

0.50

26.9815382

1.3490769

Silicon

Si

24.96

2

20.00

28.0855300

56.1710600

Calcium

Ca

13.36

0.75

7.50

40.0784000

30.0588000

Iron

Fe

9.93

0.4

4.00

55.8452000

22.3380800

Analysis wt%

SiO2 : 55.06, TiO2 : 0.51, Al2O3 : 7.67, Fe2O3 : 1.68, FeO : 4.01, MgO : 11.97, CaO : 14.22, Na2O : 4.70 (Ref: American Mineralogist 63)

Strunz 9th edition incl. updates

9.DA.20

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
A: Ketten- und Bandsilikate mit 2 periodischen Ketten SiO6; Pyroxen-Familie
20:Ca-Na Klinopyroxene; Omphacit-Gruppe

Lapis Classification

VIII/F.01-100

VIII: SILIKATE
F: Ketten- und Bandsilikate
1: Zweierketten [Si2O6] 4-; Pyroxen-Gruppe; Klinopyroxene

Classification by Hölzel

9.DC.120

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
C: Augite-Group

Dana 8th edition

65.01.03b.01

65: Inosilicate Minerals
01: Inosilicates Inosilicate Single-Width Unbranched Chains, W=1 with chains P=2
03b: C2/c clinopyroxenes (intermediate clinopyroxenes)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Pyroxene group  ⇒ Clinopyroxene group

Optical Properties

Color

grasgrün, dunkelgrün

Streak color

grünlichweiß

Diaphaneity (Transparency)

durchscheinend

max. Birefringence

0.02

Birefringence chart\! Omphacite title=Birefringence chart Omphacite

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

1.68

RI value β

1.69

RI value γ / ε

1.70

Ri mean

1.690

2V angle

Biaxial (+) 70°!

Crystallography

Crystal System

monoklin

Class (H-M)

2/m, 2/m

Space Group number

15, 13

Space Group

C2/c, P2/n

Cell parameters a (Å)

9.66

Cell parameters b (Å)

8.82

Cell parameters c (Å)

5.228

Cell parameters a/b or c/a

1.095

Cell parameters c/b

0.593

Cell parameters α

90°

Cell parameters β

106.55

Cell parameters γ

90°

Z

4

Volume (ų)

426.978

X-Ray Powder Diffraction

4.4(50),
3.19(50),
2.976(100),
2.915(50),
2.127(70),
2.118(70),
2.019(70),
1.402(80)

XRD chart Omphacite

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)

5.5

VHN (Hardness Vickers)

530 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.29 - 3.39 / Durchschnittlich = 3.34

3.5 ( ρ calc. Mineralienatlas )

Instability

- HCl

(Co-)Type locality

(Co-)Type locality

Deutschland/Sachsen/Mittelsachsen, Landkreis/Freiberg, Revier/Dorfchemnitz/Voigtsdorf/Eklogitaufschlüsse

Deutschland/Bayern/Oberfranken, Bezirk/Hof, Landkreis/Konradsreuth/Silberbach

Österreich/Kärnten/Völkermarkt, Bezirk/Griffen/Wölfnitz, KG/Saualpe

Type material

Mineralogische Sammlung der TU Bergakademie Freiberg

Collection number of type material

100568 / K 103

Paragenesis of type material

Pyrop im Eklogit

Preface

Author (Name, Year)

Werner, 1815

External links

Alex Strekeisen

References

Handbook of Mineralogy (Anthony et al.), 2 (1995), 600

IMA group assignments



 
 
 
NaFe3+Si2O6
monoklin
C2/c

 
 
 
(Ca,Na)(Fe3+,Mg,Fe2+)Si2O6
monoklin
C2/c

 
 
 
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al)2O6
monoklin
C2/c

 
 
 
Mg2Si2O6
monoklin
P21/c

 
 
 
Fe2+2Si2O6
monoklin
P21/c

 
 
 
NaTi3+Si2O6
monoklin
C2/c

 
 
 
CaMgSi2O6
monoklin
C2/c

 
 
 
CaFe3+AlSiO6
monoklin
C2/c

 
 
 
CaTi3+AlSiO6
monoklin
C2/c

 
 
 
CaFe2+Si2O6
monoklin
C2/c

 
 
 
Na(Al,Fe3+)Si2O6
monoklin
C2/c

 
 
 
(Na,Ca,Fe2+)(Sc,Mg,Fe2+)Si2O6
monoklin
C2/c

 
 
 
CaMnSi2O6
monoklin
C2/c

 
 
 
MnMgSi2O6
monoklin
P21/c

 
 
 
NaCr3+Si2O6
monoklin
C2/c

 
 
 
CaAl2SiO6
monoklin
C2/c

 
 
 
NaMn3+[Si2O6]
monoklin
C2/c

 
 
 
Na(V3+,Cr3+)Si2O6
monoklin
C2/c

 
 
 
(Ca,Na)(Mg,Fe2+,Fe3+,Al)Si2O6
monoklin
C2/c, P2/n

 
 
 
Ca(Zn,Mn2+,Fe2+,Mg)Si2O6
monoklin
C2/c

 
 
 
(Mg,Fe,Ca)2Si2O6
monoklin
P21/c

 
 
 
CuMgSi2O6
monoklin
P21/c

 
 
 
LiAlSi2O6
monoklin
C2/c

 
 
 
(Ca,Na,☐)AlSi2O6
monoklin
C2/c

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Actuality: 31. Oct 2024 - 15:05:26

Other languages

Dutch

Omfaciet

Polish

Omfacyt

German

Omphacit

French

Omphacite

English

Omphacite

Spanish

Onfacita

Portuguese

Onfacite

Russian

Омфацит

Japanese

オンファス輝石

Simplified Chinese

绿辉石

Alternative Name

German

Diopsidjadeit

Diopsidjadeita

Diopsidjadeite

Jadeite-Diopside

Mayait

Mayaita

Mayaite

Mexikanischer Jadeit

Omphacita

Omphazit

Titanian Omphacite

Tuxtlit

Tuxtlita

Tuxtlite

Japanese

オンファス輝石

CNMNC symbol

Symbol

Omp

Rock part of

Refresh list | View legend

Hint

- Essential mineral - Important for the classification of the rock.
- Accessory or non-essential mineral - this minerals are common, sometimes major part of, but are not always present.

Actuality: 31. Oct 2024 - 15:05:26

Locations with GPS information

IDs

GUSID (Global unique identifier short form) ixZFMDw_R0erkho6REA8ag
GUID (Global unique identifier) 3045168B-3F3C-4747-AB92-1A3A44403C6A
Database ID 2826