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Schlegelite (Schlegelit)

Collectors Summary

Color gelb
Streak color blassgelb
Lustre Diamantglanz
Hardness (Mohs) 3.5
Cleavages gut (010) und (001)
Fracture uneben
Crystal System orthorhombisch, Pnca
Morphology kugelige Aggregate aus lattenförmigen tafeligen Kristallen

Chemism

Chemical formula

Bi7O4(MoO4)2(AsO4)3

Chemical composition

Arsen, Bismut, Molybdän, Sauerstoff

Unit weight: 2263.4978 u; Number of atoms in the formula: 36

Info

Empirical formula:

Bi7O4(MoO4)2(AsO4)3

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Oxygen

O

16.96

24

66.67

15.9994300

383.9863200
Arsenic

As

9.93

3

8.33

74.9216020

224.7648060
Molybdenum

Mo

8.48

2

5.56

95.9420000

191.8840000
Bismuth

Bi

64.63

7

19.44

208.9803820

1,462.8626740

Analysis wt%

MoO3 : 12.13, P2O5 : 0.51, As2O5 : 15.38, Bi2O3 : 70.20, PbO : 0.48 (Ref: European Journal of Mineralogy 2006)

Strunz 9th edition incl. updates

8.BO.45

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
O: Mit ausschließlich [Kationen] (OH, etc.):RO4 ≥ 1:1
45:Schlegelit-Gruppe

Lapis Classification

VII/B.30-030

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
30: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb

Classification by Hölzel

7.GB.460

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
G: Molybdates and Wolframates
B: Molybdates and Wolframates (+Anions -Water)

Dana 8th edition

48.04.03.02

48: Anhydrous Molybdates and Tungstates
04: Anhydrous Molybdates and Tungstates with miscellaneous formulae
03: Vergasovaite Series

IMA status

anerkannt 2003

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelb

Streak color

blassgelb

Diaphaneity (Transparency)

transparent

Lustre

Diamantglanz

max. Birefringence

0.040
Birefringence chart\! Schlegelite title=Birefringence chart Schlegelite

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

2.22

RI value β

2.255

RI value γ / ε

2.26

Ri mean

2.245

2V angle

Biaxial (-) 40°

Pleochroism

kein

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

60

Space Group

Pnca

Cell parameters a (Å)

5.299

Cell parameters b (Å)

16.133

Cell parameters c (Å)

23.948

Cell parameters a/b or c/a

0.328

Cell parameters c/b

1.484

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

4

Volumne (ų)

2047.285

X-Ray Powder Diffraction

3.41(37), 2.996(69), 2.963(48), 2.688(100), 2.001(28), 1.887(13), 1.657(14)
XRD chart Schlegelite

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

Morphology

kugelige Aggregate aus lattenförmigen tafeligen Kristallen

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

285 (25g)

Density (g/cm³)

7.23 berechnet

7.343 ( ρ calc. Mineralienatlas )

Cleavages

gut (010) und (001)

Fracture

uneben

Tenacity

spröde

(Co-)Type locality

(Co-)Type locality

Deutschland/Sachsen/Erzgebirgskreis/Lagerstätte Schneeberg/Neustädtel/Wolfgangmaßen-Grubenfeld/Pucherschacht (inkl. Halde)

Type material

Staatliche Naturhistorische Sammlungen Dresden

Collection number of type material

Min 19625 Sa (MMG Dresden) / Tresor

Paragenesis of type material

Quarz, Petitjeanit, Pucherit, Wismut, Sillenit

Preface

Associations

Quarz, Petitjeanit, Pucherit, Wismut, Sillenit

Author (Name, Year)

Effenberger & Krause & Bernhardt, 2004

Additional Information

benannt nach Fritz Schlegel, Schneeberg.

References

European Crystallographic Meeting 22 (2004), poster
Mineralien Welt 06/08, Steffen Jahn, Die neuen Mineralien 2007 - 2008

Other languages

German

Schlegelit

English

Schlegelite

CNMNC (IMA)-Number

IMA 2003-051

CNMNC symbol

Symbol

Scg

Locations with GPS information