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Taramite

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Taramit
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1442062629
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Taramit
stängeliges, rotbraunes Belegstück aus Minas Gerais, BB = 24,4 mm
Copyright: Hannes Osterhammer; Contribution: Münchener Micromounter
Collection: Lithothek der Münchener Micromounter, Collection number: A009309, Donator: Manfred Seitz
Location: Brasilien/Südosten (Região Sudeste)/Minas Gerais/Mucuri-Tal/Malacacheta (Franciscopolis)
Mineral: Taramite
Image: 1442062629
Rating: 6 (votes: 1)
License: Usage for Mineralienatlas project only
Taramit (SNr: A009309)

stängeliges, rotbraunes Belegstück aus Minas Gerais, BB = 24,4 mm

Collection: Lithothek der Münchener Micromounter
Copyright: Hannes Osterhammer
Contribution: Münchener Micromounter 2015-09-12
Locality: Malacacheta (Franciscopolis) / Mucuri-Tal / Minas Gerais / Südosten (Região Sudeste) / Brasilien

Collectors Summary

Color grünlichgrau
Lustre Glasglanz
Cleavages gut (110)
Crystal System monoklin, C2/m

Additional information / Summary

Das Mineral wurde vom Amphibol-Subkomitee (2012) umbenannt von Alumino-Magnesiotaramit zu Taramit. Das frühere Taramit ist jetzt Ferro-Taramit.

Beim Vergleich mit älterer Litertur ist darauf zu achten, dass die neue Formel von Taramit Fe3+ < Al hat. Taramit mit Formel Fe3+ > Al sind damit Ferro-Taramit.

Chemism

Chem­ical formula

Na(NaCa)(Mg3Al2)(Si6Al2)O22(OH)2

Chem­ical com­po­si­tion

Aluminium, Calcium, Magnesium, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 821.4146672 u; Number of atoms in the formula: 42

Info

Empirical formula:

Na(NaCa)(Mg3Al2)(Si6Al2)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.25

2

4.76

1.0079470

2.0158940

Oxygen

O

46.75

24

57.14

15.9994300

383.9863200

Sodium

Na

5.60

2

4.76

22.9897702

45.9795404

Magnesium

Mg

8.88

3

7.14

24.3050600

72.9151800

Aluminium

Al

13.14

4

9.52

26.9815382

107.9261528

Silicon

Si

20.51

6

14.29

28.0855300

168.5131800

Calcium

Ca

4.88

1

2.38

40.0784000

40.0784000

Anal­y­sis wt%

SiO2 : 38.56, Al2O3 : 10.31, TiO2 : 0.96, Fe2O3 : 13.12, FeO : 18.72, MnO : 1.91, MgO : 1.24, CaO : 5.78, Na2O : 4.71, K2O : 2.73, H2O : 1.56 (Ref: Mineralogical Magazine 64)

Strunz 9th edi­tion incl. updates

9.DE.20

9: Silikate (Germanate)
D: Ketten- und Bandsilikate (Inosilikate)
E: Ketten- und Bandsilikate mit 2-periodischen Doppelketten, Si4O11; Amphibol-Familie, Klinoamphibole
20:

Lapis Clas­sifica­tion

VIII/F.09-062

VIII: SILIKATE
F: Ketten- und Bandsilikate
9: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Na-Ca-Amphibole

Clas­sifica­tion by Hölzel

9.DI.530

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
I: Amphiboles; Sodiccalcic Amphiboles
5: Taramite-Group

Dana 8th edi­tion

66.01.03b.16

66: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2
01: Inosilicates Inosilicate Double-Width Unbranched Chains, W=2 with P=2 amphibole configuration
03b: Group 3, the sodic-calcic amphiboles

IMA sta­tus

anerkannt 2006, umbenannt 2012

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Sodium-calcium amphiboles  ⇒ Taramite (Tar) amphiboles

Optical Properties

Color

grünlichgrau

Lus­tre

Glasglanz

max. Birefrin­gence

0.017

Birefringence chart\! Taramite title=Birefringence chart Taramite

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

1.654

RI value β

1.666

RI value γ / ε

1.671

Ri mean

1.664

2V angle

Biaxial (-) 74°

Pleochro­ism

X=farblos, Y=dunkelviolett Z=blau

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.790

Cell param­e­ters b (Å)

17.899

Cell param­e­ters c (Å)

5.319

Cell param­e­ters a/b or c/a

0.547

Cell param­e­ters c/b

0.297

Cell param­e­ters α

90°

Cell param­e­ters β

104.90

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

900.715

X-Ray Pow­der Diffrac­tion

8.381(92), 3.374(56), 3.104(69), 2.934(41), 2.697(100), 2.580(53), 2.552(60), 2.325(41)

XRD chart Taramite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

3.21 berechnet

3.029 ( ρ calc. Mineralienatlas )

Cleav­ages

gut (110)

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

Norwegen/Vestland, Provinz/Selje/Liset

Preface

Author (Name, Year)

Leake et al., 1997

References

Leake B E, Woolley A R, Arps C E S, Birch W D, Gilbert M C, Grice J D, Hawthorne F C, Kato A, Kisch H J, Krivovichev V G, Linthout K, Laird J, Mandarino J A, Maresch W V, Nickel E H, Rock N M S, Schumacher J C, Smith D C, Stephenson N C N, Ungaretti L, Whittaker E J W, Youzhi G - Nomenclature of amphiboles - Report of the subcommittee on amphiboles of the International Mineralogical Association, commission on new minerals and mineral names, The Canadian Mineralogist 35 (1997), 219-246

Mineralien Welt 04/08, Steffen Jahn, Die neuen Mineralien 2007 - 2008

Oberti R, Boiocchi M, Smith D C, Medenbach O - Aluminotaramite, alumino-magnesiotaramite, and fluoro-alumino-magnesiotaramite: mineral data and crystal chemistry. American Mineralogist 92 (2007), 1428-1435

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





 
 
 
 
 
Na(CaNa)(Mg3Fe3+2)(Al2Si6O22)F2
 
 

 
 
 
 
 
Na(NaCa)(Mg3Fe3+2)(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
Na(CaNa)(Fe2+3Fe3+2)(Al2Si6O22)F2
 
 

 
 
 
 
 
Na(NaCa)(Fe2+3Fe3+2)(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
Na(CaNa)(Fe2+3Al2)(Al2Si6O22)F2
 
 

 
 
 
 
 
Na(CaNa)(Fe2+3Al2)(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
Na(CaNa)(Mg3Al2)(Si6Al2)O22F2
monoklin
C2/m

 
 
 
 
 
Na2Ca(Mg3AlFe3+)(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
K(CaNa)(Mg3Fe3+2)(Al2Si6O22)(OH)
 
 

 
 
 
 
 
K(CaNa)(Fe2+3Fe3+2)(Si6Al2)O22(OH)2
monoklin
C2/m

 
 
 
 
 
K(CaNa)(Fe2+3Al2)(Si6Al2)O22(OH)2
monoklin
C/2m

 
 
 
 
 
Na(NaCa)(Mg3Al2)(Si6Al2)O22(OH)2
monoklin
C2/m

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Actuality: 10. Aug 2022 - 21:48:30

Other languages

German

Taramit

Spanish

Taramita

English

Taramite

Russian

Тарамит

Simplified Chinese

绿铁闪石

old name

German

Alumino-Magnesiotaramit (1997)

English

Alumino-magnesiotaramite (1997)

Alternative Name

Alumino-Magnesiotaramite

Magnesio-aluminotaramite

CNMNC (IMA)-Number

IMA 2006-024

CNMNC symbol

Symbol

Trm

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Тарамит

Mineral Dealer

German pages

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

Locations with GPS information