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Maufite (Maufit)

Collectors Summary

Color smaragdgrün
Streak color grünlichweiß
Hardness (Mohs) 3

Chemism

Chemical formula

(Mg,Ni)Al4Si3O13·4H2O

Additional chem. information

Zusammenschichtung von Klinochlor und Lizardit

Chemical composition

Aluminium, Magnesium, Nickel, Silicium, Sauerstoff, Wasserstoff

Unit weight: 505.1387788 u; Number of atoms in the formula: 33

Info

Empirical formula:

(Mg0.75Ni0.25)Al4Si3O13·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.60

8

24.24

1.0079470

8.0635760
Oxygen

O

53.84

17

51.52

15.9994300

271.9903100
Magnesium

Mg

3.61

0.75

2.27

24.3050600

18.2287950
Aluminium

Al

21.37

4

12.12

26.9815382

107.9261528
Silicon

Si

16.68

3

9.09

28.0855300

84.2565900
Nickel

Ni

2.90

0.25

0.76

58.6934200

14.6733550

Analysis wt%

SiO2 : 33.26, Al2O3 : 36.81, Fe2O3 : 0.79, FeO : 0.68, MgO : 4.78, NiO : 4.28, H2O : 19.38 (Ref: Hintze, Handbuch der Mineralogie, 1904-1974)

Classification by Hölzel

9.EL.180

9: SILICATES
E: Phyllosilicates
L: Allophane-Group

IMA status

diskreditiert, IMA Massendiskreditierung 11/2006 (Antrag 06-C)

Fred J. Wicks, Pete J. Dunn, Malcolm E. Back, Robert A. Ramik: “Maufite” Discredited: Not A Mineral Species But An Important Interstratified Ni-Bearing Lizardite +Clinochlore. Can. Mineral. Vol. 53 (2015) S. 911-920.

Mineral status

Gemenge/Gemisch/Mischkristall

Optical Properties

Color

smaragdgrün

Streak color

grünlichweiß

Diaphaneity (Transparency)

durchscheinend

RI value α / ω / n

1.526

Ri mean

1.526

Crystallography

Cell parameters α

nd

Cell parameters β

nd

Cell parameters γ

nd

Physical Properties

Hardness (Mohs)

3

Density (g/cm³)

2.27

Preface

Author (Name, Year)

Keep, 1930

References

American Mineralogist (1930): 15: 275.

Canadian Mineralogist (1998): 36: 926.

Canadian Mineralogist Vol. 44, pp. 1557-1560 (2006)

Other languages

German

Maufit

Spanish

Maufita

English

Maufite

French

Maufite