Steklite (original) (raw)

A valid IMA mineral species

About StekliteHide

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Specific Gravity:

2.792 (Calculated)

Name:

From the Russian word стекло (steklo) for glass as an allusion to the visual appearance of aggregates of the mineral formed around vents of a burning coal heap (coal mine N 47 near Kopeisk, South Urals, Russia).

K-analogue of godovikovite.

Found on a burnt coal dump, so first considered to be anthropogenic and not to be a true mineral.

Steklite is a natural analog of the synthetic KAl(SO4)2 studied by Manoli et al (1970).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:40128:7

07849db3-74b5-4363-9bd9-828a33aa2d77

IMA Classification of StekliteHide

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Approval history:

First published without approval in 1995, then approved in 2011 from a natural occurrence (Yadovitaya fumarole, Tolbachik volcano).

Type description reference:

Murashko, M. N., Pekov, I. V., Krivovichev, S. V., Chernyatyeva, A. P., Yapaskurt, V. O., Zadov, A. E., Zelensky, M. E. (2013) Steklite, KAl(SO4)2: A finding at the Tolbachik Volcano, Kamchatka, Russia, validating its status as a mineral species and crystal structure. Geology of Ore Deposits, 55 (7) 594-600 doi:10.1134/s1075701513070088

Classification of StekliteHide

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7.AC.20

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
C : With medium-sized and large cations

Mineral SymbolsHide

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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of StekliteHide

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Comment:

Aggregates are white to grayish white

Cleavage:

Perfect
parallel to {001}

Comment:

Fracture is lamellar while very thin flakes are flexible.

Density:

2.792 g/cm3 (Calculated)

Optical Data of StekliteHide

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RI values:

_n_ω = 1.546(2) _n_ε = 1.533(3)

δ = 0.013

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Pleochroism:

Non-pleochroic

Chemistry of StekliteHide

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Crystallography of StekliteHide

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Class (H-M):

32 - Trapezohedral

Cell Parameters:

a = 4.7281(3) Å, c = 7.9936(5) Å

Unit Cell V:

154.76 ų (Calculated from Unit Cell)

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of StekliteHide

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General Appearance of Type Material:

Hexagonal plates and more frequently multi!angular irregular lamellae. The both are commonly 5–10 µm and occasionally up to 30 µm in thickness; 0.2 mm and rarely up to 1 mm across

Place of Conservation of Type Material:

Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, registration number 4109/1

Geological Setting of Type Material:

Associated Minerals at Type Locality:

Reference:

Murashko, M.; Pekov, I.; Krivovichev, S.; Chernyatyeva, A.; Yapaskurt, V.; Zadov, A.; Zelensky, M. (2013): Steklite, KAl(SO4)2: A finding at the Tolbachik Volcano, Kamchatka, Russia, validating its status as a mineral species and crystal structure. Geology of Ore Deposits, 55, 594-600.

Synonyms of StekliteHide

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Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Fluorescence of StekliteHide

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Other InformationHide

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Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for StekliteHide

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References for StekliteHide

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Reference List:

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

Murashko, M. N., Pekov, I. V., Krivovichev, S. V., Chernyatyeva, A. P., Yapaskurt, V. O., Zadov, A. E., Zelensky, M. E. (2013) Steklite, KAl(SO4)2: A finding at the Tolbachik Volcano, Kamchatka, Russia, validating its status as a mineral species and crystal structure. Geology of Ore Deposits, 55 (7) 594-600 doi:10.1134/s1075701513070088

Localities for StekliteHide

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This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.