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Alumino-ferrotschermakite

Collectors Summary

Color grün
Streak color weiß
Hardness (Mohs) 5.00 - 6.00
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

Ca2Fe32+Al2[OH|AlSi3O11]2

Chem­ical com­po­si­tion

Aluminium, Calcium, Eisen, Silicium, Sauerstoff, Wasserstoff

Unit weight: 910.1339468 u; Number of atoms in the formula: 41

Info

Empirical formula:

Ca2Fe3Al2[OHAlSi3O11]2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.22

2

4.88

1.0079470

2.0158940
Oxygen

O

42.19

24

58.54

15.9994300

383.9863200
Aluminium

Al

11.86

4

9.76

26.9815382

107.9261528
Silicon

Si

18.52

6

14.63

28.0855300

168.5131800
Calcium

Ca

8.81

2

4.88

40.0784000

80.1568000
Iron

Fe

18.41

3

7.32

55.8452000

167.5356000

Anal­y­sis wt%

SiO2 : 39.34, Al2O3 : 15.58, Fe2O3 : 10.46, FeO : 16.46, MgO : 3.96, CaO : 12.24, H2O : 1.97 (Ref: berechnet)

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.10-075

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

Clas­sifica­tion by Hölzel

9.DH.560

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

Hey's Chem­ical Index of Min­er­als

16.21.04

16: Silicates Containing Aluminum and other Metals
21: Aluminosilicates of Fe and Ca

IMA sta­tus

umbenannt vom Amphibol-Subkommittee (1997) von Ferro-Alumino-Tschermakit zu Alumino-Ferrotschermakit für stark Aluminium-haltigen Tschermakit mit Fe2+ Dominanz.

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

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

Optical Properties

Color

grün

Streak color

weiß

Diaphane­ity (Trans­parency)

durchscheinend

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters α

90°

Cell param­e­ters γ

90°

Z

2

Physical Properties

Hard­ness (Mohs)

5.00 - 6.00

Density (g/cm³)

3.302 (berechnet)

Preface

Author (Name, Year)

Leake, 1978

References

Mineralogical Magazine 39 (1973), 36.

American Mineralogist 63 (1978), 1023.

Canadian Mineralogist 35 (1997), 219.

IMA group assignments

 
Amphibole supergroup
 
 
 

 
 
(OH,F,Cl)-dominant amphiboles
 
 
 

 
 
 
Calcium amphiboles
 
 
 

 
 
 
 
Tschermakite (Ts) amphiboles
 
 
 

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

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

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

 
 
 
 
 
Ferri-tschermakite
☐Ca2(Mg3Fe3+2)(Si6Al2)O22(OH)2
 
 

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

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

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Actuality: 23. May 2022 - 20:00:29

Other languages

German

Alumino-Ferrotschermakit

French

Alumino-Ferrotschermakite

Spanish

Alumino-ferrotschermakita

English

Alumino-ferrotschermakite

Alternative Name

Aluminoferrotschermakit

Spanish

Aluminoferrotschermakita

Aluminoferrotschermakite

Ferro-Alumino-Tschermakit

German

Ferro-Aluminotschermakit

English

Ferro-aluminotschermakite

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