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Ferri-whittakerite

Additional Functions

Collectors Summary

Color blauschwarz
Lustre Glasglanz
Cleavages vollkommen {110}
Fracture uneben
Crystal System monoklin, C2/m

Chemism

Chemical formula

Na(Na1.0-1.5Li0.5-1.0)2(Fe3+2Mg2Li)Si8O22(OH)2

Chemical composition

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

Unit weight: 871.79726672 u; Number of atoms in the formula: 44.2

Info

Empirical formula:

Na(Na1.3Li0.8)2(Fe2Mg2Li)Si8O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.23

2

4.52

1.0079470

2.0158940

Lithium

Li

2.07

2.6

5.88

6.9412000

18.0471200

Oxygen

O

44.05

24

54.30

15.9994300

383.9863200

Sodium

Na

9.49

3.6

8.14

22.9897702

82.7631727

Magnesium

Mg

5.58

2

4.52

24.3050600

48.6101200

Silicon

Si

25.77

8

18.10

28.0855300

224.6842400

Iron

Fe

12.81

2

4.52

55.8452000

111.6904000

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.DF.530

9: SILICATES
D: Inosilicates; ~[Si2O6]4--...2-Chain
F: Amphiboles; Orthorhombic Amphiboles
5: with Na-Ca-Mg-Fe-Mn-Li - Ottoliniite-Group

IMA status

diskreditiert 2012; seitdem Synonym für Ferri-Leakeit

IMA Classification

IMA Classification

Amphibole supergroup  ⇒ (OH,F,Cl)-dominant amphiboles  ⇒ Sodium-(magnesium-iron-manganese) amphiboles

Optical Properties

Color

blauschwarz

Diaphaneity (Transparency)

durchscheinend

Lustre

Glasglanz

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

12

Space Group

C2/m

Cell parameters a (Å)

9.712

Cell parameters b (Å)

17.851

Cell parameters c (Å)

5.297

Cell parameters a/b or c/a

0.544

Cell parameters c/b

0.297

Cell parameters α

90°

Cell parameters β

103.63°

Cell parameters γ

90°

Z

2

Volume (ų)

892.473

X-Ray Powder Diffraction

8.344(100),
4.463(40),
3.392(70),
3.098(70),
2.701(100),
2.576(40),
2.524(70),
2.157(30)

XRD chart Ferri-whittakerite

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

Physical Properties

Density (g/cm³)

3.22 (berechnet)

3.244 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {110}

Fracture

uneben

Tenacity

spröde

Preface

Author (Name, Year)

Oberti & Cámara & Caballero, 2004

References

American Mineralogist 89 (2004), 888

IMA group assignments




 
 
 
 
AB(Na1Li1)C(Fe3+2Mg3)TSi8O22(OH)2
monoklin
C2/m

 
 
 
 
Na(Na1.0-1.5Li0.5-1.0)2(Fe3+2Mg2Li)Si8O22(OH)2
monoklin
C2/m

 
 
 
 
NaLi(Mg3Fe3+Al)Si8O22(OH)2
 
C/2m

 
 
 
 
Na(Na Li)(Li Mg2Fe3+Al)Si8O22(OH)2
monoklin
 

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Actuality: 23. Mar 2024 - 16:10:42

Other languages

German

Ferri-Whittakerit

Spanish

Ferri-whittakerita

English

Ferri-whittakerite

French

Ferri-whittakerite

Russian

Ферривиттакерит

CNMNC (IMA)-Number

IMA 2001-069

IDs

GUSID (Global unique identifier short form) JRWsTRVa3UOa1CATQBoXFQ
GUID (Global unique identifier) 4DAC1525-5A15-43DD-9AD4-2013401A1715
Database ID 1157