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Drysdallite

Pictures (3 Images total)

Drysdallit
Views (Image: 1512660604): 482
Drysdallit (SNr: D098aa)

Solwezi Distrikt, Nordwestprovinz, Sambia. Bildbreite 0,9 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2017-12-07
Locality: Solwezi, Distrikt / Nordwestprovinz / Sambia
Drysdallit
Views (Image: 1512660905): 244
Drysdallit (SNr: D098ab)

Solwezi Distrikt, Nordwestprovinz, Sambia. Bildbreite Bildbreite 1 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2017-12-07
Locality: Solwezi, Distrikt / Nordwestprovinz / Sambia
Drysdallit
Views (Image: 1512661172): 244
Drysdallit (SNr: D098ac)

Solwezi Distrikt, Nordwestprovinz, Sambia. Bilbreite 0,7 mm

Collection: Ulrich Baumgärtl
Copyright: Ulrich Baumgärtl
Contribution: Ulrich Baumgärtl 2017-12-07
Locality: Solwezi, Distrikt / Nordwestprovinz / Sambia

Collectors Summary

Color grauschwarz mit braunschwarzem Stich
Streak color bräunlichschwarz
Lustre Metallglanz
Hardness (Mohs) 1.00 - 1.50
Cleavages vollkommen nach {001}
Crystal System hexagonal, P63/mmc

Chemism

Chem­ical formula

Mo(Se,S)2

Empir­ical formula (anal­y­sis)

Mo0,85(Se1,76S0,24)

Chem­ical com­po­si­tion

Molybdän, Selen, Schwefel

Unit weight: 228.2213 u; Number of atoms in the formula: 2.85

Info

Empirical formula:

Mo0.85(Se1.76S0.24)

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

3.37

0.24

8.42

32.0655000

7.6957200

Selenium

Se

60.89

1.76

61.75

78.9630000

138.9748800

Molybdenum

Mo

35.73

0.85

29.82

95.9420000

81.5507000

Anal­y­sis wt%

Mo : 35.30, Se : 60.40, S : 3.40 (Ref: Neues Jahrbuch für Mineralogie, (Monatshefte) 73)

Strunz 9th edi­tion incl. updates

2.EA.30

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
E: Metallsulfide mit M:S >= 1:2
A: M:S = 1:2, mit Cu, Ag, Au; Ni, Sn, PGE, Mo, W
30:Molybdänit-Gruppe

Lapis Clas­sifica­tion

II/D.25-030

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
D: Sulfide mit Metall : S,Se,Te < 1:1

Clas­sifica­tion by Hölzel

2.EA.520

2: SULFIDES
E: Me/S=1/2 (also < 1/2)
A: Me/S=1/2 with Cu,Ag,Au, etc.
5: Molybdenite-Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grauschwarz mit braunschwarzem Stich

Streak color

bräunlichschwarz

Lus­tre

Metallglanz

Bireflectance

stark (weiß nach pink-grau)

Anisotropism

sehr stark

Crystallography

Crystal Sys­tem

hexagonal

Class (H-M)

6/mmm

Space Group number

194

Space Group

P63/mmc

Cell param­e­ters a (Å)

3.287

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

12.914

Cell param­e­ters a/b or c/a

3.929

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

120°

Z

2

Volumne (ų)

120.834

X-Ray Pow­der Diffrac­tion

6.46(80),
2.845(50),
2.373(100),
1.913(50),
1.643(40),
1.615(40),
1.351(20),
1.086(20)

XRD chart Drysdallite

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

Physical Properties

Hard­ness (Mohs)

1.00 - 1.50

VHN (Hard­ness Vick­ers)

52 (7.6g)

Density (g/cm³)

6.25 (berechnet)

6.272 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen nach {001}

(Co-)Type locality

(Co-)Type locality

Sambia/Nordwestprovinz/Solwezi, Distrikt/Kampijimpanga

Type mate­r­ial

Mineralogische Sammlungen, Institut für Mineralogie, Charles Universität, Prag

Par­a­ge­n­e­sis of type mate­r­ial

Wilkeit, Uraninit, Masuyit, Talk

Preface

Name from

A. R. Drysdall, ehemaliger Direktor des Geologischen Dienstes, Lusaka, Sambia

Author (Name, Year)

Cech & Rieder & Vrána, 1973

References

Neues Jahrbuch für Mineralogie, Monatshefte (1973), 433

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Jordisite

MoS2

amorph

2.EA.30

'Castaingite'

CuMo2S5

2.EA.30

Drysdallite

Mo(Se,S)2

hexagonal : 6/mmm : P63/mmc

2.EA.30

Tungstenite

WS2

hexagonal : 6/mmm : P63/mmc

2.EA.30

Molybdenite

MoS2

2.EA.30

'Dzhezkazganite'

ReMoCu2PbS6

2.EA.30

'Molybdenite-2H' (Pol.v. Molybdenite)

MoS2

hexagonal : 6/mmm : P63/mmc

2.EA.30

'Molybdenite-3R' (Pol.v. Molybdenite)

MoS2

trigonal : 3m : R3m

2.EA.30

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Rheniite

ReS2

triklin : 1 : P1

II/D.25-005

Molybdenite

MoS2

II/D.25-010

Jordisite

MoS2

amorph

II/D.25-020

Drysdallite

Mo(Se,S)2

hexagonal : 6/mmm : P63/mmc

II/D.25-030

Tungstenite

WS2

hexagonal : 6/mmm : P63/mmc

II/D.25-040

'Castaingite'

CuMo2S5

II/D.25-050

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Molybdenite

MoS2

2.EA.50

'Molybdenite-2H' (Pol.v. Molybdenite)

MoS2

hexagonal : 6/mmm : P63/mmc

2.EA.500

Tungstenite

WS2

hexagonal : 6/mmm : P63/mmc

2.EA.510

Drysdallite

Mo(Se,S)2

hexagonal : 6/mmm : P63/mmc

2.EA.520

'Molybdenite-3R' (Pol.v. Molybdenite)

MoS2

trigonal : 3m : R3m

2.EA.530

Jordisite

MoS2

amorph

2.EA.540

'Castaingite'

CuMo2S5

2.EA.560

Rheniite

ReS2

triklin : 1 : P1

2.EA.580

'Dzhezkazganite'

ReMoCu2PbS6

2.EA.590

Other languages

German

Drysdallit

Spanish

Drysdallita

French

Drysdallite

English

Drysdallite

Russian

Дрисдаллит

Japanese

ドライスダルアイト

IMA Number

IMA 1973-027

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Drysdallit
Google-Bilder-Suche - search for: Drysdallit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Drysdallit

English pages

Mindat - search for: Drysdallite
Webmineral - search for:Drysdallite
Handbook-of-Mineralogy - search for: Drysdallite
RRUFF - Raman, XRD and other mineral data - search for: Drysdallite
RRUFF - References and PDF downloads - search for: Drysdallite
American-Mineralogist-Crystal-Structure-Database - search for: Drysdallite
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Russian pages

Webmineral.ru - search for: Дрисдаллит

Mineral Dealer

German pages

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Locations with GPS information