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

Potassic-ferro-taramite

Additional Functions

Collectors Summary

Color dunkelbläulichgrün
Lustre Glasglanz
Cleavages gut nach {110}
Crystal System monoklin, C/2m
Morphology Das Mineral tritt in Form von millimetergroßen Körnern mit gut ausgebildeter prismatischer Morphologie auf.

Chemism

Chem­ical formula

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

Addi­tional chem. informa­tion

Amphibol-Gruppe

Chem­ical com­po­si­tion

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

Unit weight: 932.143627 u; Number of atoms in the formula: 42

Info

Empirical formula:

K(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

41.19

24

57.14

15.9994300

383.9863200

Sodium

Na

2.47

1

2.38

22.9897702

22.9897702

Aluminium

Al

11.58

4

9.52

26.9815382

107.9261528

Silicon

Si

18.08

6

14.29

28.0855300

168.5131800

Potassium

K

4.19

1

2.38

39.0983100

39.0983100

Calcium

Ca

4.30

1

2.38

40.0784000

40.0784000

Iron

Fe

17.97

3

7.14

55.8452000

167.5356000

Anal­y­sis wt%

SiO2 : 38.36, TiO2 : 0.46, Al2O3 : 17.56, Fe2O3 : 3.94, FeO : 21.44, MgO : 1.40, MnO : 0.72, CaO : 6.77, Na2O : 3.97, K2O : 3.31, H2O : 1.88 (Ref: European Journal of Mineralogy 2008)

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.09-075

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

Clas­sifica­tion by Hölzel

9.DI.590

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

IMA sta­tus

anerkannt - IMA Veröffentlichung Juli 2007

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Classification

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

Optical Properties

Color

dunkelbläulichgrün

Lus­tre

Glasglanz

max. Birefrin­gence

0.020

Birefringence chart\! Potassic-ferro-taramite title=Birefringence chart Potassic-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

1.686

RI value β

1.703

RI value γ / ε

1.706

Ri mean

1,698

2V angle

Biaxial (-) 45.6 (berechnet)

Pleochro­ism

Im Durchlicht starker Pleochroismus von α = farblos über β = dunkelviolett nach γ = dunkelblau sowie extreme Dispersion.

Optical Data Luminescence

Lumi­nes­cence

keine Fluoreszenz bekannt

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C/2m

Cell param­e­ters a (Å)

9.8505

Cell param­e­ters b (Å)

18.0075

Cell param­e­ters c (Å)

5.3518

Cell param­e­ters a/b or c/a

0.547

Cell param­e­ters c/b

0.297

Cell param­e­ters α

90°

Cell param­e­ters β

104.775

Cell param­e­ters γ

90°

Volumne (ų)

917.928

X-Ray Pow­der Diffrac­tion

8.420(100), 3.400(38), 3.127(53), 2.714(75), 2.596(49), 2.565(60), 2.340(32), 2.166(34)

XRD chart Potassic-ferro-taramite

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

Morphol­ogy

Das Mineral tritt in Form von millimetergroßen Körnern mit gut ausgebildeter prismatischer Morphologie auf.

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

3.40 ber.

Cleav­ages

gut nach {110}

Tenac­ity

spröde

Preface

Name from

Das Mineral wurde in Übereinstimmung mit den Richtlinien zur aktuellen Amphibol-Nomenklatur benannt

Author (Name, Year)

Roberta Oberti, 2007

References

IMA Veröffentlichung Juli 2007
Mineralien Welt 05/09, Steffen Jahn, Neue Mineralien

IMA group assignments

Other languages

German

Kalium-Ferro-Taramit

English

Potassic-ferro-taramite

old name

German

Kalium-Aluminotaramit (pre 2012)

German

Kaliumaluminotaramit (pre 2012)

English

Potassic-aluminotaramite (pre 2012)

English

Potassicaluminotaramite

CNMNC (IMA)-Number

IMA 2007-015

CNMNC symbol

Symbol

Pftrm

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

German pages

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

English pages

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

Mineral Dealer

German pages

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