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Parawulffite (Parawulffit)

Pictures (1 Images total)

Parawulffit
Views (File:
1401699740
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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
Location: Russland/Ferner Osten, Föderationskreis/Kamtschatka, Krai/Tolbachik-Vulkan/Große Spalteneruption (Great Fissure)/nördlicher Bruch/zweiter Schlackenkegel/Arsenatnaya Fumarole
Mineral: Parawulffite
Image: 1401699740
License: Usage for Mineralienatlas project only
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, Krai / 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

Strunz 9th edition incl. updates

7.B.

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
B: Sulfate (Selenate, etc.) mit weitere Anionen, ohne H2O

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

Volume (ų)

1631.981

Crystal 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

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

Other languages

German

Parawulffit

English

Parawulffite

Russian

Паравульфит

CNMNC (IMA)-Number

IMA 2013-036

CNMNC symbol

Symbol

Pwlf

Locations with GPS information

IDs

GUSID (Global unique identifier short form) Y2y9O60m3UerTi81d9ZI1w
GUID (Global unique identifier) 3BBD6C63-26AD-47DD-AB4E-2F3577D648D7
Database ID 7656