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Parawulffite

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Parawulffit
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Parawulffit

Bildbreite: 1,5 mm, Fundort: Arsenatnaya Fumarole, zweiter Schlackenkegel, nördlicher Bruch, Große Spalteneruption, Tolbachik Vulkan, Kamchatka Oblast', Russland

Copyright: Stephan Wolfsried
Contribution: Hg 2014-06-02
Locality: Arsenatnaya Fumarole / zweiter Schlackenkegel / nördlicher Bruch / Große Spalteneruption (Great Fissure) / Tolbachik-Vulkan / Kamtschatka Oblast / Ferner Osten, Föderationskreis / Russland

Collectors Summary

Color dunkelgrün, smragdgrün
Streak color hellgrün
Lustre Glasglanz
Hardness (Mohs) ~2.5
Cleavages vollkommen [001], gut (001)
Solubility langsam in H2O löslich
Crystal System monoklin, P2/c
Morphology prismatische Kristalle bis 0.3 × 1 mm als Kluster und Krusten

Chemism

Chemical formula

K5Na3Cu8O4(SO4)8

Chemical composition

Kupfer, Natrium, Kalium, Sauerstoff, Schwefel

Unit weight: 1605.3347406 u; Number of atoms in the formula: 60

Info

Empirical formula:

K5Na3Cu8O4(SO4)8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

35.88

36

60.00

15.9994300

575.9794800

Sodium

Na

4.30

3

5.00

22.9897702

68.9693106

Sulfur

S

15.98

8

13.33

32.0655000

256.5240000

Potassium

K

12.18

5

8.33

39.0983100

195.4915500

Copper

Cu

31.67

8

13.33

63.5463000

508.3704000

Lapis Classification

VI/B.06-030

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
B: Wasserfreie Sulfate, mit fremden Anionen
6: Mittelgroße Kationen vorwiegend

IMA status

anerkannt - CNMNC Newsletter No. 17, October 2013

Mineral status

anerkanntes Mineral

Optical Properties

Color

dunkelgrün, smragdgrün

Streak color

hellgrün

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

max. Birefringence

0.132

Birefringence chart\! Parawulffite title=Birefringence chart Parawulffite

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

α = 1.585(3)

RI value γ / ε

γ = 1.717(4)

2V angle

Biaxial (+)

Crystallography

Crystal System

monoklin

Class (H-M)

2/m

Space Group number

13

Space Group

P2/c

Cell parameters a (Å)

13.904

Cell parameters b (Å)

4.9765

Cell parameters c (Å)

23.586

Cell parameters a/b or c/a

2.794

Cell parameters c/b

4.739

Cell parameters α

90°

Cell parameters β

90.209°

Cell parameters γ

90°

Z

2

Volumne (ų)

1631.981

Kristall structure

Neuer Strukturtyp; verwandt mit Wulffit; Struktur bestimmt

X-Ray Powder Diffraction

9.06(100),
7.00(23),
5.903(12),
3.096(31),
2.736(33),
2.674(11),
2.492(24),
2.321(26)

XRD chart Parawulffite

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

Morphology

prismatische Kristalle bis 0.3 × 1 mm als Kluster und Krusten

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

~2.5

Density (g/cm³)

3.35(2) (gemessen), 3.32 (berechnet)

3.267 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen [001], gut (001)

Tenacity

spröde

Instability

langsam in H2O löslich

(Co-)Type locality

(Co-)Type locality

Russland/Ferner Osten, Föderationskreis/Kamtschatka Oblast/Tolbachik-Vulkan/Große Spalteneruption (Great Fissure)/nördlicher Bruch/zweiter Schlackenkegel/Yadovitaya-Fumarole

Type material

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moskau, Russland

Collection number of type material

4386/1

Paragenesis of type material

Euchlorin, Fedotovit, Hämatit, Langbeinit, Steklit, etc.

Preface

Name from

Der Name stammt von der Verwandtschaft zu Wulffit

Author (Name, Year)

Igor V. Pekov, Natalia V. Zubkova, Vasiliy O. Yapaskurt, Dmitriy I. Belakovskiy, Nikita V. Chukanov, Inna S. Lykova, Evgeny G. Sidorov und Dmitry Y. Pushcharovsky (2003)

References

Pekov, I.V., Zubkova, N.V., Yapaskurt, V.O., Belakovskiy, D.I., Chukanov, N.V., Lykova, I.S., Sidorov, E.G. und Pushcharovsky, D.Y. (2013) Parawulffite, IMA 2013-036. CNMNC Newsletter No. 17, October 2013, page 2998; Mineralogical Magazine, 77, 2997 - 3005.

Igor V. Pekov, Natalia V. Zubkova and Vasiliy O. Yapaskurt - WULFFITE, K3NaCu4O2(SO4)4, AND PARAWULFFITE, K5Na3Cu8O4(SO4)8, two nes minerals from FUMAROLE SUBLIMATES OF THE TOLBACHIK VOLCANO, KAMCHATKA, RUSSIA - The Canadian Mineralogist 52, S. 699 - 716

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

Euchlorine

KNaCu32+(SO4)3O

monoklin : 2/m : C2/c

VI/B.06-010

Wulffite

K3NaCu4O2(SO4)4

orthorhombisch : mm2 : Pn21a

VI/B.06-020

Parawulffite

K5Na3Cu8O4(SO4)8

monoklin : 2/m : P2/c

VI/B.06-030

Other languages

German

Parawulffit

English

Parawulffite

Russian

Паравульфит

IMA Number

IMA 2013-036

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

German pages

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

English pages

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

Webmineral.ru - search for: Паравульфит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Parawulffit
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Locations with GPS information




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