'._('einklappen').'
 

Crookesite

Pictures (1 Images total)

Crookesit und Berzelianit
Views (Image: 1217775508): 2100
Crookesit und Berzelianit

in Calcit. C: blaugrau, B: schwärzlich. Bukov, Hochland, Mähren, Tschechien. 2 x 5 cm.

Collection: Doc Diether
Copyright: Doc Diether
Contribution: Doc Diether 2008-08-03
Locality: Bukau (Bukov) / Rožná (Roschna) / Žd'ár nad Sázavou (Saar), Okres / Hochland (Kraj Vysočina) / Tschechien

Collectors Summary

Color bleigrau
Lustre Metallglanz
Hardness (Mohs) 2.50 - 3.00
Cleavages zwei im richtigen Winkel, mittelmäßig ausgeprägt
Solubility +++ HNO3, - HCl
Crystal System tetragonal, I4

Chemism

Chem­ical formula

Cu7(Tl,Ag)Se4

Chem­ical com­po­si­tion

Kupfer, Selen, Silber, Thallium

Unit weight: 940.930645 u; Number of atoms in the formula: 12

Info

Empirical formula:

Cu7(Tl0.75Ag0.25)Se4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Copper

Cu

47.27

7

58.33

63.5463000

444.8241000

Selenium

Se

33.57

4

33.33

78.9630000

315.8520000

Silver

Ag

2.87

0.25

2.08

107.8682200

26.9670550

Thallium

Tl

16.29

0.75

6.25

204.3833200

153.2874900

Anal­y­sis wt%

Cu : 46.89, Tl : 21.03, Se : 32.43 (Ref: C.R.Paris,87)

Strunz 9th edi­tion incl. updates

2.BD.50

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
B: Metallsulfide, M : S > 1 : 1 (hauptsächlich 2 : 1)
D: mit Quecksilber (Hg), Thallium (Tl)
50:Crookesit-Gruppe

Lapis Clas­sifica­tion

II/B.03-030

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
B: Sulfide, Selenide und Telluride mit Verhältnis Metall : S,Se,Te > 1:1
3: Selenide mit Kupfer vorherrschend

Clas­sifica­tion by Hölzel

2.BD.390

2: SULFIDES
B: Sulfides (etc) with Me/S > 1/1 (mostly 2/1)
D: With Hg,Tl,(Na,K)
3: Thalcusite-Sabatierite-Group (with Tl,K)

Dana 8th edi­tion

02.04.12.01

02: Sulfide Minerals
04: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=2:1

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

bleigrau

Diaphane­ity (Trans­parency)

opak

Lus­tre

Metallglanz

Anisotropism

schwach aber ausgebrägt in brauntönen

Reflec­tiv­ity: (Lambda nm) ↓, ↑, Ø

(400) 33.60, 35.90, 34.75
(420) 33.30, 35.80, 34.55
(440) 32.70, 35.80, 34.25
(460) 32.40, 35.70, 34.05
(480) 32.50, 35.60, 34.05
(500) 32.80, 35.30, 34.05
(520) 33.10, 35.10, 34.10
(540) 33.10, 34.80, 33.95
(560) 33.00, 34.70, 33.85
(580) 32.70, 34.60, 33.65
(600) 32.60, 34.70, 33.65
(620) 32.40, 35.00, 33.70
(640) 32.20, 35.20, 33.70
(660) 31.90, 35.20, 33.55
(680) 31.60, 35.30, 33.45
(700) 31.20, 35.30, 33.25

Reflection chart Crookesite

Reflec­tiv­ity Ø

33.91

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

4

Space Group number

82

Space Group

I4

Cell param­e­ters a (Å)

10.435

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

3.954

Cell param­e­ters a/b or c/a

0.379

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

430.548

X-Ray Pow­der Diffrac­tion

5.21(10),
3.30(100),
3.01(80),
2.59(100),
2.32(30),
2.11(50),
1.837(40),
1.783(40)

XRD chart Crookesite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

2.50 - 3.00

VHN (Hard­ness Vick­ers)

108 (100g)

Density (g/cm³)

6.90 (gemessen)

7.258 ( ρ calc. Mineralienatlas )

Cleav­ages

zwei im richtigen Winkel, mittelmäßig ausgeprägt

Tenac­ity

spröde

Insta­bil­ity

+++ HNO3, - HCl

(Co-)Type locality

(Co-)Type locality

Schweden/Östergötland, Provinz/Valdemarsvik/Skrikerum

Preface

Occurrences

Bukov, Rozna, Hochland, Mähren, Tschechien.

Name from

Sir William Crookes

Sir William Crookes (geboren am 17. Juni 1832 in London; † 4. April 1919 ebenda) war ein britischer Physiker, Chemiker, Wissenschaftsjournalist und Parapsychologe. WikiPedia:William_Crookes

Author (Name, Year)

Nordenskiöld, 1866

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 115

Bulletin Mensuel de la Société Chimique de Paris 7 (1867), 409

Comptes Rendus de l'Académie des Sciences de Paris 304 (1987), 1121

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

Crookesite

Cu7(Tl,Ag)Se4

tetragonal : 4 : I4

2.BD.50

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

Berzelianite

Cu2Se

kubisch : m3m : Fm3m

II/B.03-010

Bellidoite

Cu2Se

tetragonal : 4/m, : P42/n,

II/B.03-020

Crookesite

Cu7(Tl,Ag)Se4

tetragonal : 4 : I4

II/B.03-030

Sabatierite

Cu6TlSe4

II/B.03-040

Umangite

Cu3Se2

tetragonal : 42m : P421m

II/B.03-050

Athabascaite

Cu5Se4

II/B.03-060

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

Thalcusite

(Cu,Fe)4Tl2S4

2.BD.300

Bukovite

Tl2Cu3FeSe4

tetragonal : 4/mmm : I4/mmm

2.BD.320

Murunskite

K2Cu3FeS4

2.BD.330

Chvilevaite

Na(Cu,Fe,Zn)2S2

trigonal : 3m : P3m1

2.BD.340

Rohaite

TlCu5SbS2

2.BD.350

Chalcothallite

(Tl,K)2Cu5.5(Fe,Ag)SbS4

tetragonal : 4/mmm : I4/mmm

2.BD.360

Sabatierite

Cu6TlSe4

2.BD.380

Crookesite

Cu7(Tl,Ag)Se4

tetragonal : 4 : I4

2.BD.390

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Berzelianite

Cu2Se

kubisch : m3m : Fm3m

02.04.10.01

Cuprostibite

Cu2(Sb,Tl)

tetragonal : 4/mmm : P4/nmm

02.04.11.01

Crookesite

Cu7(Tl,Ag)Se4

tetragonal : 4 : I4

02.04.12.01

Sabatierite

Cu6TlSe4

02.04.12.02

Carlinite

Tl2S

trigonal : 3 : R3

02.04.13.01

Palladoarsenide

Pd2As

monoklin : 2/m : P2/m

02.04.14.01

Palladobismutharsenide

Pd2(As,Bi)

orthorhombisch : mm2, mmm : P21cn, Pmcn

02.04.15.01

Majakite

PdNiAs

hexagonal : 6m2 : P62m

02.04.16.01

Menshikovite

Pd3Ni2As3

hexagonal : 6, 6/m, 622 : P63, P63/m, P6322

02.04.16.02

Petrovskaite

AuAg(S,Se)

monoklin : 2, m, 2/m : P2, Pm, P2/m

02.04.17.01

Novákite

(Cu,Ag)21As10

monoklin : 2/m, m, m : C2/m, Cm, Cc

02.04.18.01

Rhodarsenide

(Rh,Pd)2As

orthorhombisch : mmm : Pnma

02.04.19.01

Palladodymite

(Pd,Rh)2As

orthorhombisch : mmm : Pnma

02.04.19.02

CNMNC symbol

Symbol

Crk

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Крукесит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Crookesit
Crystal-Treasure.com - search for: Crookesit
Bosse - search for: Crookesit

Locations with GPS information