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Clino-sodic-ferri-ferro-holmquistite

Collectors Summary

Color schwarz
Streak color grau
Cleavages Perfekt {110}
Crystal System monoklin, C2/m

Chemism

Chem­ical formula

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

Chem­ical com­po­si­tion

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

Unit weight: 881.073266775 u; Number of atoms in the formula: 41

Info

Empirical formula:

Na0.5Li2(Fe0.55Fe0.25Mg0.1Li0.05Al0.05)5Si8O22((OH)0.75F0.25)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.17

1.5

3.66

1.0079470

1.5119205

Lithium

Li

1.77

2.25

5.49

6.9412000

15.6177000

Oxygen

O

42.67

23.5

57.32

15.9994300

375.9866050

Fluorine

F

1.08

0.5

1.22

18.9984033

9.4992016

Sodium

Na

1.30

0.5

1.22

22.9897702

11.4948851

Magnesium

Mg

1.38

0.5

1.22

24.3050600

12.1525300

Aluminium

Al

0.77

0.25

0.61

26.9815382

6.7453846

Silicon

Si

25.50

8

19.51

28.0855300

224.6842400

Iron

Fe

25.35

4

9.76

55.8452000

223.3808000

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

Clas­sifica­tion by Hölzel

9.DG.260

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

IMA sta­tus

Anerkannt

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

max. Birefrin­gence

0.009

Birefringence chart\! Clino-sodic-ferri-ferro-holmquistite title=Birefringence chart Clino-sodic-ferri-ferro-holmquistite

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

1.703

RI value β

1.703

RI value γ / ε

1.708

Ri mean

1.703

2V angle

Biaxial (+) 84°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell param­e­ters a (Å)

9.472

Cell param­e­ters b (Å)

17.844

Cell param­e­ters c (Å)

5.276

Cell param­e­ters a/b or c/a

0.531

Cell param­e­ters c/b

0.296

Cell param­e­ters α

90°

Cell param­e­ters β

101.97

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

872.351

X-Ray Pow­der Diffrac­tion

8.22(60),
4.458(20),
3.044(100),
2.741(50),
2.712(10),
2.341(210),
1.433(50),
1.392(10)

XRD chart Clino-sodic-ferri-ferro-holmquistite

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

Crystals 3D

Open larger view

Physical Properties

Density (g/cm³)

3.354 ( ρ calc. Mineralienatlas )

Cleav­ages

Perfekt {110}

Preface

Name from

Der stammt von der Zusammensetzung des Minerals

Author (Name, Year)

Caballero & Monge & Iglesia & Tornos, 1998

References

Canadian Mineralogist 35 (1997), 219

IMA group assignments

Other languages

English

Clino-sodic-ferri-ferro-holmquistite

German

Klino-Natrium-Ferri-Ferro-Holmquistit

Spanish

Sodioferriclinoferroholmquistita

old name

German

Natrium-Ferri-Klinoferroholmquistit (pre 2012)

German

Natroferriklinoferroholmquistit

English

Sodic-ferri-clinoferroholmquistite (pre 2012)

CNMNC (IMA)-Number

IMA 1995-045

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

German pages

DeWikiPedia - search for: Klino-Natrium-Ferri-Ferro-Holmquistit
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English pages

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