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Whittakerite

Collectors Summary

Crystal System monoklin,

Chemism

Chemical formula

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

Chemical composition

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

Unit weight: 801.9852526 u; Number of atoms in the formula: 42

Info

Empirical formula:

Na(NaLi)(LiMg2FeAl)Si8O22(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.25

2

4.76

1.0079470

2.0158940

Lithium

Li

1.73

2

4.76

6.9412000

13.8824000

Oxygen

O

47.88

24

57.14

15.9994300

383.9863200

Sodium

Na

5.73

2

4.76

22.9897702

45.9795404

Magnesium

Mg

6.06

2

4.76

24.3050600

48.6101200

Aluminium

Al

3.36

1

2.38

26.9815382

26.9815382

Silicon

Si

28.02

8

19.05

28.0855300

224.6842400

Iron

Fe

6.96

1

2.38

55.8452000

55.8452000

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

IMA status

theorethischen Amphibol-Mitglied

Mineral status

Mineralstatus fragwürdig

IMA Classification

IMA Classification

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

Crystallography

Crystal System

monoklin

Cell parameters α

90°

Cell parameters γ

90°

Preface

Author (Name, Year)

Leake und weitere, 2003

References

The Canadian Mineralogist Vol. 41, pp. 1355-1362 (2003)

American Mineralogist 89 (2004), 888

IMA group assignments

Other languages

German

Whittakerit

English

Whittakerite