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Hodgesmithite

Collectors Summary

Color hellblau, türkisblau, grünlichblau
Streak color sehr hellblau
Lustre Glasglanz
Hardness (Mohs) ~2
Cleavages vollkommen parallel {001}
Fracture uneben
Crystal System trigonal, P3
Morphology Hodgesmithit bildet Aggregate und Krusten, die aus plattenförmigen hexagonalen Kristallen bestehen. Einzelne Kristalle sind abgeflacht auf {001} und haben einen Durchmesser von bis zu 0,05 mm.

Chemism

Chem­ical formula

(Cu,Zn)6Zn(SO4)2(OH)10·3H2O

Empir­ical formula (anal­y­sis)

Cu4.84Zn2.16Cd0.04[(SO4)1.89(SiO4)0.12]Σ2.01(OH)9.82·3.15H2O

Addi­tional chem. informa­tion

Kupfer-Zink-Sulfat

Chem­ical com­po­si­tion

Kupfer, Zink, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 869.71505654 u; Number of atoms in the formula: 46.18

Info

Empirical formula:

Cu4.84Zn2.16Cd0.04[(SO4)1.89(SiO4)0.12](OH)9.82·3.15H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

1.87

16.12

34.91

1.0079470

16.2481056

Oxygen

O

38.65

21.01

45.50

15.9994300

336.1480243

Silicon

Si

0.39

0.12

0.26

28.0855300

3.3702636

Sulfur

S

6.97

1.89

4.09

32.0655000

60.6037950

Copper

Cu

35.36

4.84

10.48

63.5463000

307.5640920

Zinc

Zn

16.24

2.16

4.68

65.4094000

141.2843040

Cadmium

Cd

0.52

0.04

0.09

112.4118000

4.4964720

Strunz 9th edi­tion incl. updates

7.DD.55

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

IMA sta­tus

anerkannt März 2016 - CNMNC Newsletter No. 30, April 2016

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

hellblau, türkisblau, grünlichblau

Streak color

sehr hellblau

Lus­tre

Glasglanz

max. Birefrin­gence

0.032

Birefringence chart\! Hodgesmithite title=Birefringence chart Hodgesmithite

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

ω = 1.694 (4)

RI value γ / ε

ε = 1.662(4)

2V angle

uniaxial (-)

Pleochro­ism

Das Mineral ist schwach pleochroit mit ε = farblos und ω = hellblau.

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3

Space Group number

143

Space Group

P3

Cell param­e­ters a (Å)

8.1905(12

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

7.0990(14)

Cell param­e­ters a/b or c/a

0.867

Cell param­e­ters c/b

-

Z

1

Volumne (ų)

412.428

Kristall struc­ture

Eng verwandt mit Schulenbergit; Struktur bestimmt

X-Ray Pow­der Diffrac­tion

7.098(100),
5.020(5),
3.550(19),
3.173(19),
2.681(16),
2.509(19),
2.138(6),
1.772(4)

XRD chart Hodgesmithite

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

Morphol­ogy

Hodgesmithit bildet Aggregate und Krusten, die aus plattenförmigen hexagonalen Kristallen bestehen. Einzelne Kristalle sind abgeflacht auf {001} und haben einen Durchmesser von bis zu 0,05 mm.

Physical Properties

Hard­ness (Mohs)

~2

Density (g/cm³)

3.48(4) gemessen; 3.5 berechnet

3.501 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen parallel {001}

Frac­ture

uneben

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

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

Type mate­r­ial

Mineralogische Sammlung des South Australian Museum, Adelaide, Australia

Col­lec­tion number of type mate­r­ial

G34298

Preface

Author (Name, Year)

Peter Elliott (2016)

References

Elliott, P. (2016) Hodgesmithite, IMA 2015-112. CNMNC Newsletter No. 30, April 2016, page 411; Mineralogical Magazine, 80, 407–413.

Peter Elliott - Hodgesmithite, (Cu,Zn)6Zn(SO4)2(OH)10·3H2O, a new copper zinc sulfate mineral with a unique, decorated, interrupted-sheet structure - Structural Science Crystal Engineering Materials (2019) ISSN 2052-5206; Acta Cryst. (2019). B75; https://doi.org/10.1107/S205252061901343X

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

Bechererite

Zn7Cu[(OH)13|SiO(OH)3|SO4]

trigonal : 3, 3 : P3, P3

7.DD.55

Hodgesmithite

(Cu,Zn)6Zn(SO4)2(OH)10·3H2O

trigonal : 3 : P3

7.DD.55

CNMNC (IMA)-Number

IMA 2015-112

CNMNC symbol

Symbol

Hdg

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

German pages

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Mineralogisch-Petrographisches-Institut Hamburg - search for: Hodgesmithit

English pages

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Russian pages

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