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Clino-ferro-ferri-holmquistite

Additional Functions

Collectors Summary

Color schwarz
Streak color grau
Lustre Glasglanz
Hardness (Mohs) 6
Cleavages gut nach {110}
Fracture uneben
Crystal System monoklin, C/2m
Morphology sehr kleine Aggregate aus subidiomorphen bis idiomorphen xx

Chemism

Chemical formula

☐Li2(Fe3+,Fe2+,Mg,Al)2Si8O22(OH,F)2

Chemical composition

Aluminium, Eisen, Lithium, Magnesium, Silicium, Fluor, Sauerstoff, Wasserstoff, Vakanz

Unit weight: 728.060372955 u; Number of atoms in the formula: 38.5

Info

Empirical formula:

VcLi2(Fe0.55Fe0.3Mg0.1Al0.05)2Si8O22((OH)0.75F0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Vacancy

Vc

0.00

1

2.60

0.0000000

0.0000000

Hydrogen

H

0.21

1.5

3.90

1.0079470

1.5119205

Lithium

Li

1.91

2

5.19

6.9412000

13.8824000

Oxygen

O

51.64

23.5

61.04

15.9994300

375.9866050

Fluorine

F

1.30

0.5

1.30

18.9984033

9.4992016

Magnesium

Mg

0.67

0.2

0.52

24.3050600

4.8610120

Aluminium

Al

0.37

0.1

0.26

26.9815382

2.6981538

Silicon

Si

30.86

8

20.78

28.0855300

224.6842400

Iron

Fe

13.04

1.7

4.42

55.8452000

94.9368400

Strunz 9th edition incl. updates

9.DE.25

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

Lapis Classification

VIII/F.07-090

VIII: SILIKATE
F: Ketten- und Bandsilikate
7: Zweierbänder [Si4O11] 6-; Amphibol-Gruppe; Mg-Fe-Mn-Amphibole

Classification by Hölzel

9.DG.240

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
G: Amphiboles; Monoclinic Amphiboles
2: Clinoholmquistite-Group

IMA status

anerkannt; Name empfohlen vom Amphibol-Subkommittee (1997) für das Fe2+-Fe3+ dominante Mitglied der Klinoholmquistit-Serie

Mineral status

anerkanntes Mineral

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Lithium amphiboles  ⇒ Holmquistite (Hol) amphiboles

Optical Properties

Color

schwarz

Streak color

grau

Diaphaneity (Transparency)

wahrscheinlich durchscheinend

Lustre

Glasglanz

2V angle

Biaxial

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)

9.462

Cell parameters b (Å)

17.898

Cell parameters c (Å)

5.302

Cell parameters a/b or c/a

0.529

Cell parameters c/b

0.296

Cell parameters α

90°

Cell parameters β

101.88

Cell parameters γ

90°

Z

2

Volumne (ų)

878.666

X-Ray Powder Diffraction

8.22(100),
4.474(30),
3.420(30),
3.042(50),
2.717(70),
2.586(20),
2.492(30),
2.165(20)

XRD chart Clino-ferro-ferri-holmquistite

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

Morphology

sehr kleine Aggregate aus subidiomorphen bis idiomorphen xx

Crystals 3D

Open larger view

Physical Properties

Hardness (Mohs)

6

Density (g/cm³)

3.24 (berechnet)

2.752 ( ρ calc. Mineralienatlas )

Cleavages

gut nach {110}

Fracture

uneben

Tenacity

Spröde

Preface

Occurrences

magmatisch, episyenitisch und retrograd metamorph

Associations

Quarz, Plagioklas, Mikroklin, Annit, Zirkon, Ferri-Whittakerit, Ferri-Ottoliniit, Natrium-Ferri-Klinoferroholmquistit, Titanit, Andradit, Tainiolit, Ferro-Aktinolith

Author (Name, Year)

Leake u.w., 1997

Additional Information

Name: entsprechend der Amphibol-Nomenklatur.

References

Canadian Mineralogist 35 (1997), 219.

European Journal of Mineralogy 15 (2003), 321.

Canadian Mineralogist 41 (2003), 1345.

American Mineralogist 89 (2004), 1577.

European Journal of Mineralogy 17 (2005), 733.

Hawthorne, Frank C., and Roberta Oberti (2006), On the classification of amphiboles - Canadian Mineralogist 44(1), 1-21.

IMA group assignments



 
 
 
 
 
 


 
 
 
 
 
ABLi2C(Mg3Fe3+2)Si8O22(OH)2
 
 

 
 
 
 
 
☐Li2(Fe3+,Fe2+,Mg,Al)2Si8O22(OH,F)2
monoklin
C/2m

 
 
 
 
 
☐Li2[(Fe2+)3Al2]Si8O22(OH,F)2
monoklin
C2/m

 
 
 
 
 
☐Li2(Mg3Al2)Si8O22(OH)2
 
 

 
 
 
 
 
Na0.5Li2(Fe3+,Fe2+,Mg,Li,Al)5Si8O22(OH,F)2
monoklin
C2/m

 
 
 
 
 
☐Li2(Fe2+3Al2)(Si8O22)(OH)2
orthorhombisch
Pnma

 
 
 
 
 
Li2(Mg,Fe2+)3Al2Si8O22(OH)2
orthorhombisch
Pnma

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Actuality: 16. Aug 2022 - 18:23:41

Other languages

Spanish

Clino-ferro-ferri-holmquistita

English

Clino-ferro-ferri-holmquistite

German

Klino-Ferro-Ferri-Holmquistit

Simplified Chinese

单斜二铁锂闪石

Traditional Chinese

單斜二鐵鋰閃石

old name

German

Ferri-Klinoferroholmquistit (pre 2012)

English

Ferri-clinoferroholmquistite (pre 2012)

CNMNC (IMA)-Number

IMA 2001-066

CNMNC symbol

Symbol

Cffhlm