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Tschermakite

Pictures (3 Images total)

Tschermakit Porphyroblasten
Views (File:
1312281779
): 8194
Tschermakit Porphyroblasten
Amphibol-porphyroblastischer Gneis mit Porphyroblasten aus Klinoamhibol (Var. Tschermakit). Die gelbliche Färbung der Matrix wird durch Oxidation hervorgerufen. Herkunft als Lokalgeschiebe vermutlich Südnorwegen oder Nordwestschweden. Fundort: N Hanstholm bei Vigsø. Größe: 5 cm.
Copyright: Jörg; Contribution: Jörg
Collection: Jörg
Location: Dänemark/Jütland/Hanstholm
Mineral: Tschermakite
Image: 1312281779
Rating: 7 (votes: 1)
License: Usage for Mineralienatlas project only
Tschermakit Porphyroblasten

Amphibol-porphyroblastischer Gneis mit Porphyroblasten aus Klinoamhibol (Var. Tschermakit). Die gelbliche Färbung der Matrix wird durch Oxidation hervorgerufen. Herkunft als Lokalgeschiebe vermutli...

Collection: Jörg
Copyright: Jörg
Contribution: Jörg 2011-08-02
Locality: Hanstholm / Jütland / Dänemark
Tschermakit
Views (File:
1278150056
): 2200
Tschermakit
Kristallgröße: 1,2 mm, Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Italien/Kampanien (Campania), Region/Neapel, Provinz/Somma-Vesuv-Komplex/Monte Somma/Ercolano/San Vito/Steinbruch San Vito (Cava San Vito)
Mineral: Tschermakite
Image: 1278150056
License: Usage for Mineralienatlas project only
Tschermakit

Kristallgröße: 1,2 mm, Fundort: Steinbruch San Vito, San Vito, Ercolano, Monte Somma, Somma-Vesuv-Komplex, Neapel, Kampanien, Italien

Copyright: Luigi Chiappino
Contribution: thdun5 2010-07-03
Locality: Steinbruch San Vito (Cava San Vito) / San Vito / Ercolano / Monte Somma / Somma-Vesuv-Komplex / Neapel, Provinz / Kampanien (Campania), Region / Italien
Tschermakit
Views (File:
1359658659
): 1464
Tschermakit
Bildbreite: 20 mm; Fundort: Mavro Lithari, Revier Sounion, Lavrion, Attika, Griechenland
Copyright: Fritz Schreiber; Contribution: slugslayer
Location: Griechenland/Attika (Attikí, Attica)/East Attica/Lavreotiki/Lavrion (Laurion), Bergbaudistrikt/Sounion/Cato Sounio Minen/Mavro Lithari
Mineral: Tschermakite
Image: 1359658659
License: Usage for Mineralienatlas project only
Tschermakit

Bildbreite: 20 mm; Fundort: Mavro Lithari, Revier Sounion, Lavrion, Attika, Griechenland

Copyright: Fritz Schreiber
Contribution: slugslayer 2013-01-31
Locality: Mavro Lithari / Cato Sounio Minen / Sounion / Lavrion (Laurion), Bergbaudistrikt / Lavreotiki / East Attica / Attika (Attikí, Attica) / Griechenland

Collectors Summary

Color grün, dunkelgrün, schwarz
Streak color grünlichweiß
Hardness (Mohs) 5.5
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

☐Ca2(Mg3Al2)(Si6Al2)O22(OH)2

Chem­ical com­po­si­tion

Aluminium, Calcium, Magnesium, Silicium, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 815.51352681 u; Number of atoms in the formula: 42

Info

Empirical formula:

VcCa2(Mg3Al2)(Si6Al2)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

1

2.38

0.0000000

0.0000000

Hydrogen

H

0.25

2

4.76

1.0079470

2.0158940

Oxygen

O

47.09

24

57.14

15.9994300

383.9863200

Magnesium

Mg

8.94

3

7.14

24.3050600

72.9151800

Aluminium

Al

13.23

4

9.52

26.9815382

107.9261528

Silicon

Si

20.66

6

14.29

28.0855300

168.5131800

Calcium

Ca

9.83

2

4.76

40.0784000

80.1568000

Anal­y­sis wt%

SiO2 : 41.82, TiO2 : 0.41, Al2O3 : 19.33, Fe2O3 : 0.90, FeO : 6.06, MgO : 14.31, CaO : 12.81, Na2O : 2.17, H2O : 1.96 (Ref: Rock Forming Minerals 63)

Strunz 9th edi­tion incl. updates

9.DE.10

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
10:Amphibole: Ca

Lapis Clas­sifica­tion

VIII/F.10-060

VIII: SILIKATE
F: Ketten- und Bandsilikate
10: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Ca2-Amphibole

Clas­sifica­tion by Hölzel

9.DH.500

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
H: Amphiboles; Calcic Amphiboles
5: Tschermakite-Group

Dana 8th edi­tion

66.01.03a.06

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03a: Group 2, the calcic amphiboles

IMA sta­tus

Neudefinition von der CNMNC anerkannt

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Calcium amphiboles  ⇒ Tschermakite (Ts) amphiboles

Optical Properties

Color

grün, dunkelgrün, schwarz

Streak color

grünlichweiß

Diaphane­ity (Trans­parency)

durchscheinend bis teilweise opak

max. Birefrin­gence

0.018

Birefringence chart\! Tschermakite title=Birefringence chart Tschermakite

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

1.642

RI value β

1.652

RI value γ / ε

1.660

Ri mean

1.651

2V angle

Biaxial (-) 75°!

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.9

Cell param­e­ters b (Å)

18.0

Cell param­e­ters c (Å)

5.3

Cell param­e­ters a/b or c/a

0.550

Cell param­e­ters c/b

0.294

Cell param­e­ters α

90°

Cell param­e­ters β

105°..

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

912.278

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)

3.14 - 3.35 / Durchschnittlich = 3.24

2.969 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Winchell, 1945

References

American Mineralogist 87 (2002), 462

Frank C. Hawthorne, Roberta Oberti, George E. Harlow, Walter V. Maresch, Robert F. Martin, John C. Schumacer, Mark D. Welch (2012): Nomenclature of the amphibole supergroup, American Mineralogist, Volume 97, pages 2031–2048

IMA group assignments



 
 
 
 
 
 


 
 
 
 
 
☐[Ca2][Mg3Al2][(OH)2|Al2Si6O22]
monoklin
C2/m

 
 
 
 
 
Ca2Fe32+Al2[OH|AlSi3O11]2
monoklin
C2/m

 
 
 
 
 
Ca2(Fe2+3Fe3+2)(Si6Al2)O22(OH)2
monoklin
C/2m

 
 
 
 
 
☐Ca2(Mg3Fe3+2)(Si6Al2)O22(OH)2
 
 

 
 
 
 
 
☐Ca2(Fe2+3Al2)(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
☐Ca2(Mg3Al2)(Si6Al2)O22(OH)2
monoklin
C2/m

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Actuality: 06. Aug 2022 - 10:53:06

Other languages

German

Tschermakit

Spanish

Tschermakita

English

Tschermakite

French

Tschermakite

Russian

Чермакит

Simplified Chinese

钙镁闪石

Japanese

チェルマク閃石

Alternative Name

Tschermakitic hornblende

Simplified Chinese

纯镁闪石

Simplified Chinese

镁钙闪石

CNMNC symbol

Symbol

Tsr

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Чермакит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Tschermakit
Crystal-Treasure.com - search for: Tschermakit
Bosse - search for: Tschermakit
Edelsteine Neuburg - Gundolf Fischer - search for: Tschermakit
Geolitho marketplace, by and for collectors - search for: Tschermakit

Locations with GPS information