https://www.edelsteine-neuburg.de
https://www.mineral-bosse.de
https://www.mineraliengrosshandel.com
https://www.mineralbox.biz
'._('einklappen').'
 

Ferro-taramite (Aluminotaramit)

Collectors Summary

Color bläulichgrün
Lustre Glasglanz
Cleavages ziemlich undeutlich (110)
Crystal System monoklin, C2/m

Additional information / Summary

Wurde umbenannt zu Ferro-Taramit, vom Amphibol-Subkomitee (2012).

Chemism

Chemical formula

Na(CaNa)(Fe2+3Al2)(Si6Al2)O22(OH)2

Chemical composition

Aluminium, Calcium, Eisen, Natrium, Silicium, Sauerstoff, Wasserstoff

Unit weight: 916.0350872 u; Number of atoms in the formula: 42

Info

Empirical formula:

Na(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.22

2

4.76

1.0079470

2.0158940

Oxygen

O

41.92

24

57.14

15.9994300

383.9863200

Sodium

Na

5.02

2

4.76

22.9897702

45.9795404

Aluminium

Al

11.78

4

9.52

26.9815382

107.9261528

Silicon

Si

18.40

6

14.29

28.0855300

168.5131800

Calcium

Ca

4.38

1

2.38

40.0784000

40.0784000

Iron

Fe

18.29

3

7.14

55.8452000

167.5356000

Analysis wt%

SiO2 : 41.87, TiO2 : 0.69, Al2O3 : 16.43, Fe2O3 : 3.68, FeO : 14.92, MgO : 7.36, CaO : 6.74, Na2O : 5.93, H2O : 1.87 (Ref: American Mineralogist 2007)

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.09-065

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

Classification by Hölzel

9.DI.540

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

IMA status

09/2006 anerkannt; 2012 vom Amphibol-Subkomitee umbenannt zu Ferro-Taramit

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

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

Optical Properties

Color

bläulichgrün

Lustre

Glasglanz

max. Birefringence

0.021

Birefringence chart\! Ferro-taramite title=Birefringence chart Ferro-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

1.663

RI value β

1.675

RI value γ / ε

1.684

Ri mean

1.674

2V angle

Biaxial (-) 71°

Pleochroism

Im Durchlicht stark von X=farblos über Y=dunkelviolett nach Z=grünlichblau und extreme Dispersion.

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.7489

Cell parameters b (Å)

17.9377

Cell parameters c (Å)

5.3233

Cell parameters a/b or c/a

0.543

Cell parameters c/b

0.297

Cell parameters α

90°

Cell parameters β

104.539

Cell parameters γ

90°

Z

2

Volume (ų)

901.09

X-Ray Powder Diffraction

8.352(100), 3.386(39), 3.098(68), 2.703(92), 2.586(48), 2.546(56), 2.322(40), 2.156(33)

XRD chart Ferro-taramite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.29 berechnet

3.376 ( ρ calc. Mineralienatlas )

Cleavages

ziemlich undeutlich (110)

Tenacity

spröde

Preface

Author (Name, Year)

Leake, 1978

References

Canadian Mineralogist 35 (1997), 219
Mineralien Welt 04/08, Steffen Jahn, Die neuen Mineralien 2007 - 2008

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

Refresh list

Actuality: 27. Mar 2024 - 11:28:11

Other languages

German

Ferro-Taramit

English

Ferro-taramite

Russian

Ферро-тарамит

old name

German

Alumino-Taramit

Spanish

Alumino-taramita

French

Alumino-taramite

English

Alumino-taramite

German

Aluminotaramit

English

Aluminotaramite

Japanese

アルミノタラマ閃石

CNMNC (IMA)-Number

IMA 2006-023

CNMNC symbol

Symbol

Ftrm

Locations with GPS information

IDs

GUSID (Global unique identifier short form) FWQAScqJx0W9Gu6mOvp6OA
GUID (Global unique identifier) 49006415-89CA-45C7-BD1A-EEA63AFA7A38
Database ID 4352