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Edwardsite

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Edwardsit
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Edwardsit  E
Analysed with energy dispersive X-ray spectroscopy EDX
R
Analysed with RAMAN spectroscopy
X
Analysed with X-ray diffraction XRD

bläulicher Edwardsit neben farblosem Niedermayrit, Tsumeb Mine, Tsumeb, Namibia; BB < 1 mm, analysiert mittels REM-EDX, RAMAN und XRD
Copyright: Joy Desor
Contribution: openpit 2020-02-23
Locality: Tsumeb Mine / Tsumeb / Oshikoto (Otjikoto), Region / Namibia

Collectors Summary

Color hellblau
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 3~
Cleavages ausgezeichnet (100)
Fracture uneben
Crystal System monoklin, P21/C

Chemism

Chem­ical formula

Cu3Cd2(SO4)2(OH)6·4H2O

Addi­tional chem. informa­tion

Strukturell verwandt mit Cu and Zn-Sulfat-Mineralien welche Flächen mit Kanten teilenden (CuO2+,Zn)φ6-Oktaedern enthalten.

Chem­ical com­po­si­tion

Cadmium, Kupfer, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 781.694498 u; Number of atoms in the formula: 39

Info

Empirical formula:

Cu3Cd2(SO4)2(OH)6·4H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

1.81

14

35.90

1.0079470

14.1112580
Oxygen

O

36.84

18

46.15

15.9994300

287.9897400
Sulfur

S

8.20

2

5.13

32.0655000

64.1310000
Copper

Cu

24.39

3

7.69

63.5463000

190.6389000
Cadmium

Cd

28.76

2

5.13

112.4118000

224.8236000

Anal­y­sis wt%

SO3 : 20.35, CuO : 28.06, ZnO : 2.26, CdO : 32.43, H2O : 16.14 (Ref: Mineralogical Magazine 2010)

Strunz 9th edi­tion incl. updates

7.DD.30

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
D: Sulfate (Selenate, etc.) mit weitere Anionen, mit H2O
D: mit mittelgroßen Kationen; Lagen von kantenverknüpften Oktaedern
30:Devillin-Gruppe

Lapis Clas­sifica­tion

VI/D.19-004

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
D: Wasserhaltige Sulfate, mit fremden Anionen
19: Mittelgroße und sehr große Kationen

Clas­sifica­tion by Hölzel

7.DB.350

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
D: Sulfates (+Anions +Water)
B: Langite-Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

hellblau

Streak color

weiß

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz

max. Birefrin­gence

0.030
Birefringence chart\! Edwardsite title=Birefringence chart Edwardsite

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

1.74

RI value β

1.762

RI value γ / ε

1.77

Ri mean

1.757

2V angle

Biaxial (+) 62°

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m

Space Group number

14

Space Group

P21/C

Cell param­e­ters a (Å)

10.863

Cell param­e­ters b (Å)

13.129

Cell param­e­ters c (Å)

11.169

Cell param­e­ters a/b or c/a

0.827

Cell param­e­ters c/b

0.851

Cell param­e­ters α

90°

Cell param­e­ters β

113.3

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1463.018

Kristall struc­ture

Struktur bestimmt

X-Ray Pow­der Diffrac­tion

9.991(90), 5.001(90), 4.591(45), 3.332(60), 2.824(40), 2.769(55), 2.670(47)
XRD chart Edwardsite

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)

3~

VHN (Hard­ness Vick­ers)

108 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

3.53 (berechnet)

3.549 ( ρ calc. Mineralienatlas )

Cleav­ages

ausgezeichnet (100)

Frac­ture

uneben

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

Australien/New South Wales/Yancowinna Co./Broken Hill/Block 14 Opencut

Type mate­r­ial

South Australian Museum, Adelaide

Col­lec­tion number of type mate­r­ial

G32703

Par­a­ge­n­e­sis of type mate­r­ial

Niedermayrit, Christelit

Preface

Asso­cia­tions

Kristalle bis 0.06 mm, neben Niedermayrit und Christelit

Name from

dem australischen Mineralogen und Petrologen Austin Burton Edwards (1909-1960) in Anerkennung seiner Arbeiten zur Geologie, Geochemie und Mineralogie australischer Erzlagerstätten (darunter 18 Beiträge zu Broken Hill).

Author (Name, Year)

P. Elliott, J. Brugger, und T. Caradoc-Davies, 2010

References

P. Elliott, J. Brugger, and T. Caradoc-Davies: Description and crystal structure of a new mineral, edwardsite, Cu3Cd2(SO4)2(OH)6•4H2O, from Broken Hill, New South Wales. Mineral. Mag. 74 (2010) S. 39-53.

Neue Mineralien - IMA Web-Seite Sept. 2009
Mineralien Welt 04/10, Steffen Jahn, Neue Mineralien

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

Devilline

CaCu4(SO4)2(OH)6·3H2O

monoklin : 2/m : P21/c

7.DD.30

Serpierite

Ca(Cu,Zn)4(SO4)2(OH)6·3H2O

monoklin : 2/m : C2/c

7.DD.30

Campigliaite

Mn2+Cu4[(OH)6|(SO4)2]·4H2O

monoklin : 2 : C2

7.DD.30

Edwardsite

Cu3Cd2(SO4)2(OH)6·4H2O

monoklin : 2/m : P21/C

7.DD.30

Aldridgeite

(Cd,Ca)(Cu,Zn)4(SO4)2(OH)6·3H2O

monoklin : 2/m : C2/c

7.DD.30

Lautenthalite

PbCu42+(OH)6(SO4)2·3H2O

monoklin : 2/m : P21/c

7.DD.30

Niedermayrite

CdCu4[(OH)6|(SO4)2]·4H2O

monoklin : 2/m : P21/m

7.DD.30

Orthoserpierite

Ca(Cu,Zn)4(SO4)2(OH)6·3H2O

orthorhombisch : mm2 : Pca21

7.DD.30

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

Campigliaite

Mn2+Cu4[(OH)6|(SO4)2]·4H2O

monoklin : 2 : C2

VI/D.19-002

Edwardsite

Cu3Cd2(SO4)2(OH)6·4H2O

monoklin : 2/m : P21/C

VI/D.19-004

Niedermayrite

CdCu4[(OH)6|(SO4)2]·4H2O

monoklin : 2/m : P21/m

VI/D.19-005

Kobyashevite

Cu5(SO4)2(OH)6·4H2O

triklin : 1 : P1

VI/D.19-008

Devilline

CaCu4(SO4)2(OH)6·3H2O

monoklin : 2/m : P21/c

VI/D.19-010

Aldridgeite

(Cd,Ca)(Cu,Zn)4(SO4)2(OH)6·3H2O

monoklin : 2/m : C2/c

VI/D.19-015

Serpierite

Ca(Cu,Zn)4(SO4)2(OH)6·3H2O

monoklin : 2/m : C2/c

VI/D.19-020

Orthoserpierite

Ca(Cu,Zn)4(SO4)2(OH)6·3H2O

orthorhombisch : mm2 : Pca21

VI/D.19-030

Lautenthalite

PbCu42+(OH)6(SO4)2·3H2O

monoklin : 2/m : P21/c

VI/D.19-032

'Arzrunite'

Cu4Pb2SO4O2Cl6·4H2O

VI/D.19-035

Tatarskite

Ca6Mg2(SO4)2(CO3)2Cl4(OH)4·7H2O

VI/D.19-040

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

Campigliaite

Mn2+Cu4[(OH)6|(SO4)2]·4H2O

monoklin : 2 : C2

7.DB.300

Niedermayrite

CdCu4[(OH)6|(SO4)2]·4H2O

monoklin : 2/m : P21/m

7.DB.310

Christelite

Zn3Cu2[(OH)6|(SO4)2]·4H2O

triklin : 1 : P1

7.DB.320

Kobyashevite

Cu5(SO4)2(OH)6·4H2O

triklin : 1 : P1

7.DB.325

Ktenasite

ZnCu4(SO4)2(OH)6·6H2O

monoklin : 2/m : P21/c

7.DB.340

Edwardsite

Cu3Cd2(SO4)2(OH)6·4H2O

monoklin : 2/m : P21/C

7.DB.350

Other languages

German

Edwardsit

Spanish

Edwardsita

English

Edwardsite

Russian

Эдвардсит

IMA Number

IMA 2009-048

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

German pages

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

English pages

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

Russian pages

 Webmineral.ru - search for: Эдвардсит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Edwardsit
Bosse - search for: Edwardsit

Locations with GPS information