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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

Strunz 9th edi­tion incl. updates

7.AC.20

7: Sulfate (Selenate, Tellurate, Chromate, Molybdate, Wolframate)
A: Sulfate (Selenate, etc.) ohne weitere Anionen, ohne H2O
C: Mit mittelgroßen und großen Kationen
20:Godovikovit-Gruppe

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

Sabieite

(NH4)Fe3+(SO4)2

trigonal : 32 : P321

7.AC.20

Steklite

KAl(SO4)2

trigonal : 32 : P321

7.AC.20

Godovikovite

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

trigonal : 32 : P321

7.AC.20

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

CNMNC (IMA)-Number

IMA 2011-041

CNMNC symbol

Symbol

Sek

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

hausen - Mineralgroßhandel - search for: Steklit
Crystal-Treasure.com - search for: Steklit
Bosse - search for: Steklit

Locations with GPS information