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Davreuxite

Pictures (4 Images total)

Davreuxit
Views (File:
1275925072
): 1052
Davreuxit
Bildbreite: 4 mm, Fundort: Salmchâteau, Vielsalm, Bastogne, Luxembourg Provinz, Belgien
Copyright: Luigi Chiappino; Contribution: thdun5
Location: Belgien/Luxemburg (Luxembourg), Provinz/Bastogne, Bezirk/Vielsalm/Salmchâteau
Mineral: Davreuxite
Image: 1275925072
Rating: 4 (votes: 1)
License: Usage for Mineralienatlas project only
Davreuxit

Bildbreite: 4 mm, Fundort: Salmchâteau, Vielsalm, Bastogne, Luxembourg Provinz, Belgien

Copyright: Luigi Chiappino
Contribution: thdun5 2010-06-07
Locality: Salmchâteau / Vielsalm / Bastogne, Bezirk / Luxemburg (Luxembourg), Provinz / Belgien
Davreuxit
Views (File:
1408749919
): 542
Davreuxit
Bildbreite: 5 mm, Fundort: Ottré, Vielsalm, Bastogne, Luxembourg Provinz, Belgien
Copyright: Richard De Nul; Contribution: thdun5
Location: Belgien/Luxemburg (Luxembourg), Provinz/Bastogne, Bezirk/Vielsalm/Ottré
Mineral: Davreuxite
Image: 1408749919
License: Usage for Mineralienatlas project only
Davreuxit

Bildbreite: 5 mm, Fundort: Ottré, Vielsalm, Bastogne, Luxembourg Provinz, Belgien

Copyright: Richard De Nul
Contribution: thdun5 2014-08-23
Locality: Ottré / Vielsalm / Bastogne, Bezirk / Luxemburg (Luxembourg), Provinz / Belgien
Davreuxit
Views (File:
1408750016
): 542
Davreuxit
Bildbreite: 5 mm, Fundort: Ottré, Vielsalm, Bastogne, Luxembourg Provinz, Belgien
Copyright: Richard De Nul; Contribution: thdun5
Location: Belgien/Luxemburg (Luxembourg), Provinz/Bastogne, Bezirk/Vielsalm/Ottré
Mineral: Davreuxite
Image: 1408750016
License: Usage for Mineralienatlas project only
Davreuxit

Bildbreite: 5 mm, Fundort: Ottré, Vielsalm, Bastogne, Luxembourg Provinz, Belgien

Copyright: Richard De Nul
Contribution: thdun5 2014-08-23
Locality: Ottré / Vielsalm / Bastogne, Bezirk / Luxemburg (Luxembourg), Provinz / Belgien
Davreuxit
Views (File:
1515276868
): 395
Davreuxit
weißlicher Davreuxit auf Quarz; Ottrè, Vielsalm, Stavelot-Massiv, Prov. Luxenburg, Belgien; Stufe: 7 x 4 cm
Copyright: chribiedav; Contribution: chribiedav
Collection: chribiedav
Location: Belgien/Luxemburg (Luxembourg), Provinz/Bastogne, Bezirk/Vielsalm/Ottré
Mineral: Davreuxite
Image: 1515276868
License: Usage for Mineralienatlas project only
Davreuxit

weißlicher Davreuxit auf Quarz; Ottrè, Vielsalm, Stavelot-Massiv, Prov. Luxenburg, Belgien; Stufe: 7 x 4 cm

Collection: chribiedav
Copyright: chribiedav
Contribution: chribiedav 2018-01-06
Locality: Ottré / Vielsalm / Bastogne, Bezirk / Luxemburg (Luxembourg), Provinz / Belgien

Collectors Summary

Color cremeweiß, blassrosa
Streak color weiß
Hardness (Mohs) 2.00 - 3.00
Solubility - heiße Säuren
Crystal System monoklin, P21/m

Chemism

Chemical formula

MnAl6Si4O17(OH)2

Chemical composition

Aluminium, Mangan, Silicium, Sauerstoff, Wasserstoff

Unit weight: 635.1744631 u; Number of atoms in the formula: 32

Info

Empirical formula:

MnAl6Si4O17(OH)2

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.32

2

6.25

1.0079470

2.0158940

Oxygen

O

47.86

19

59.38

15.9994300

303.9891700

Aluminium

Al

25.49

6

18.75

26.9815382

161.8892292

Silicon

Si

17.69

4

12.50

28.0855300

112.3421200

Manganese

Mn

8.65

1

3.13

54.9380499

54.9380499

Analysis wt%

SiO2 : 37.82, Al2O3 : 46.88, Fe2O3 : 1.10, MnO : 9.08, MgO : 0.44, ZnO : 0.49, CuO : 0.79, H2O : 2.83 (Ref: American Mineralogist 84)

Strunz 9th edition incl. updates

9.BF.15

9: Silikate (Germanate)
B: Gruppensilikate (Sorosilikate)
F: Gruppen(Soro)-Silikate mit gemischten SiO4 und Si2O7 Gruppen; Kationen in tetrahedraler [4] und größerer Koordination
15:Davreuxit-Gruppe

Lapis Classification

VIII/F.33-010

VIII: SILIKATE
F: Ketten- und Bandsilikate
33: Kombination aus Kette und Gruppe

Classification by Hölzel

9.BN.880

9: SILICATES
B: Sorosilicates
N: With SiO4 + Si2O7
8: Not classified

Dana 8th edition

58.01.02.01

58: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups
01: Sorosilicates Sorosilicate Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [4] and higher coordination; single and double groups (n=1,2)

IMA status

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

cremeweiß, blassrosa

Streak color

weiß

max. Birefringence

0.030

Birefringence chart\! Davreuxite title=Birefringence chart Davreuxite

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

1.660

RI value β

1.684

RI value γ / ε

1.690

Ri mean

1.678

2V angle

Biaxial (-) 48°

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

11

Space Group

P21/m

Cell parameters a (Å)

9.550

Cell parameters b (Å)

5.767

Cell parameters c (Å)

12.077

Cell parameters a/b or c/a

1.656

Cell parameters c/b

2.094

Cell parameters α

90°

Cell parameters β

108.2

Cell parameters γ

90°

Z

2

Volumne (ų)

631.863

X-Ray Powder Diffraction

8.51(30),
5.719(30),
4.290(40),
3.822(30),
3.511(100),
3.103(40),
2.870(60),
2.840(30)

XRD chart Davreuxite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

2.00 - 3.00

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.34 (gemessen)

3.338 ( ρ calc. Mineralienatlas )

Instability

- heiße Säuren

Preface

Author (Name, Year)

De Koninck, 1878

References

American Mineralogist 69 (1984), 777

Other languages

German

Davreuxit

Spanish

Davreuxita

English

Davreuxite

French

Davreuxite

Russian

Даврексит

CNMNC symbol

Symbol

Drx

Locations with GPS information