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Steklite

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Steklit
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Steklit

weiße Aggregate von Steklit, Yadovitaya Fumarole, zweiter Schlackenkegel der Großen Spalteneruption, Tolbachik, Kamtschatka, Russland; BB < 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-01-26
Locality: Yadovitaya-Fumarole / zweiter Schlackenkegel / nördlicher Bruch / Große Spalteneruption (Great Fissure) / Tolbachik-Vulkan / Kamtschatka Oblast / Ferner Osten, Föderationskreis / Russland

Collectors Summary

Color farblos, weiß, grauweiß
Streak color weiß
Lustre Glasglanz
Hardness (Mohs) 2.5
Cleavages vollkommen {001}
Crystal System trigonal, P321

Chemism

Chemical formula

KAl(SO4)2

Empirical formula (analysis)

(K0.997Na0.008Ca0.004)Σ1.009(Al0.925Fe3+0.066Mg0.003Mn0.001)Σ0.995S2.001O8

Additional chem. information

K-Analog von Godovikovit

Chemical composition

Aluminium, Kalium, Sauerstoff, Schwefel

Unit weight: 260.2553115965 u; Number of atoms in the formula: 12.005

Info

Empirical formula:

(K0.997Na0.008Ca0.004)(Al0.925Fe0.066Mg0.003Mn0.001)S2.001O8

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

49.18

8

66.64

15.9994300

127.9954400

Sodium

Na

0.07

0.01

0.07

22.9897702

0.1839182

Magnesium

Mg

0.03

0

0.02

24.3050600

0.0729152

Aluminium

Al

9.59

0.93

7.71

26.9815382

24.9579228

Sulfur

S

24.65

2

16.67

32.0655000

64.1630655

Potassium

K

14.98

1

8.30

39.0983100

38.9810151

Calcium

Ca

0.06

0

0.03

40.0784000

0.1603136

Manganese

Mn

0.02

0

0.01

54.9380499

0.0549380

Iron

Fe

1.42

0.07

0.55

55.8452000

3.6857832

Analysis wt%

Na2O : 0.09, K2O : 18.12, CaO : 0.08, MnO : 0.03, Fe2O3 : 2.02, Al2O3 : 18.18, SO3 : 61.80, Total : 100.37

Lapis Classification

VI/A.05-005

VI: SULFATE, CHROMATE, MOLYBDATE UND WOLFRAMATE
A: Wasserfreie Sulfate [SO4] 2-, ohne fremde Anionen
5: Mittelgroße und sehr große Kationen

Classification by Hölzel

7.AB.330

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
A: Sulfates (-Anions -Water)
B: Sulfates, C medium + large

IMA status

anerkannt - CNMNC - New minerals and nomenclature modifications approved in Jun. 2011

Mineral status

anerkanntes Mineral

Optical Properties

Color

farblos, weiß, grauweiß

Streak color

weiß

Diaphaneity (Transparency)

transparent

Lustre

Glasglanz

RI value α / ω / n

no = 1.546 (2)

RI value γ / ε

ne = 1.533(3)

Crystallography

Crystal System

trigonal

Class (H-M)

32

Space Group number

150

Space Group

P321

Cell parameters a (Å)

4.728

Cell parameters b (Å)

-

Cell parameters c (Å)

7.994

Cell parameters a/b or c/a

1.691

Cell parameters c/b

-

Z

1

Volumne (ų)

154.757

Kristall structure

Struktur bestimmt

X-Ray Powder Diffraction

8.02(34), 4.085(11), 3.649(100), 2.861(51), 2.660(19), 2.364(25), 2.267(14), 1.822(12)

XRD chart Steklite

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)

2.5

Density (g/cm³)

2.797 (berechnet)

2.792 ( ρ calc. Mineralienatlas )

Cleavages

vollkommen {001}

(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 mineralogisches Museum der russischen Akademie der Wissenschaften, Moskau, Russland

Collection number of type material

4109/1

Preface

Name from

Der Name stammt vom russischen Wort "стекло" (steklo) für Glas und ist eine Anspielung auf das Aussehen der Aggregate.

Author (Name, Year)

Mikhail N. Murashko, Igor V. Pekov, Sergey V. Krivovichev, Anastasiya P. Chernyatieva, Vasiliy O. Yapaskurt and Aleksandr E. Zadov (2011)

References

Chernyatieva, A.P., Krivovichev, A.V., Siidra, O.I., Murashko, M.N., Pekov, I.V. (2011): Crystal structure of natural "steklite" KAl(SO4)2. Preliminary program of XVII International Conference ob Crystal Chemistry, XRD & Spectroscopy of Minerals. Poster Sessions. 2. Structure-Property Relationships, Poster n. 2.6.

http://systematic-mineralogy.com/about.aspx

Murashko, M.N., Pekov, I.V., Krivovichev, S.V., Chernyatieva, A.P., Yapaskurt, V.O. and Zadov, A.E. (2011) Steklite, IMA 2011-041. CNMNC Newsletter No. 10, October 2011, page 2558;

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

Steklite

KAl(SO4)2

trigonal : 32 : P321

VI/A.05-005

Godovikovite

(NH4)(Al,Fe3+)(SO4)2

trigonal : 32 : P321

VI/A.05-010

Sabieite

(NH4)Fe3+(SO4)2

trigonal : 32 : P321

VI/A.05-020

Aluminopyracmonite

(NH4)3Al(SO4)3

trigonal : 3 : R3

VI/A.05-025

Pyracmonite

(NH4)3Fe(SO4)3

trigonal : 3m : R3c

VI/A.05-030

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

Yavapaiite

KFe3+(SO4)2

monoklin : 2/m : C2/m

7.AB.300

Sabieite

(NH4)Fe3+(SO4)2

trigonal : 32 : P321

7.AB.310

Godovikovite

(NH4)(Al,Fe3+)(SO4)2

trigonal : 32 : P321

7.AB.320

Steklite

KAl(SO4)2

trigonal : 32 : P321

7.AB.330

Pyracmonite

(NH4)3Fe(SO4)3

trigonal : 3m : R3c

7.AB.340

Other languages

German

Steklit

English

Steklite

Russian

Стеклит

IMA Number

IMA 2011-041

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Стеклит

Mineral Dealer

German pages

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




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