Sogdianite (original) (raw)

A valid IMA mineral species

About SogdianiteHide

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Formula:

K◻2Zr2Li3[Si12O30]

Name:

Named after the ancient region of Sogdia/Sogdiana that at different times included territory located in present-day Uzbekistan, Tajikistan, Kazakhstan, and Kyrgyzstan. It existed from the 6th century BC to the 11th century AD. The type locality is in this region.

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:3708:8

9fe9970e-cd15-417f-9299-e47e261a3b9c

IMA Classification of SogdianiteHide

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IMA Formula:

KZr2Li3Si12O30

Type description reference:

Classification of SogdianiteHide

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9.CM.05

9 : SILICATES (Germanates)
C : Cyclosilicates
M : [Si6O18]12- 6-membered double rings (sechser-Doppelringe)

63.2.1a.13

63 : CYCLOSILICATES Condensed Rings
2 : Condensed Rings (Milarite - Osumilite group)

16.1.16

16 : Silicates Containing Aluminum and other Metals
1 : Aluminosilicates of Li

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.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Physical Properties of SogdianiteHide

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Density:

2.90 g/cm3 (Measured)

Optical Data of SogdianiteHide

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RI values:

_n_ω = 1.608 _n_ε = 1.606

δ = 0.002

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

Chemistry of SogdianiteHide

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Mindat Formula:

K◻2Zr2Li3[Si12O30]

Common Impurities:

Al,Mn,Mg,Ba

Crystallography of SogdianiteHide

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Class (H-M):

6/m m m _(_6/_m_2/_m_2/m ) - Dihexagonal Dipyramidal

Cell Parameters:

a = 10.08 Å, c = 14.24 Å

Unit Cell V:

1,253.03 ų (Calculated from Unit Cell)

Crystal StructureHide

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X-Ray Powder DiffractionHide

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Radiation - Copper Kα

Data Set:

Data courtesy of RRUFF project at University of Arizona, used with permission.

Powder Diffraction Data:

Geological EnvironmentHide

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Type Occurrence of SogdianiteHide

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General Appearance of Type Material:

tabular crystals to 1 cm; platy aggregates to 15 cm

Place of Conservation of Type Material:

Mineralogy Museum, St. Petersburg University, St. Petersburg, no. 16246; Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, nos. 72028, 74962, vis3595

Geological Setting of Type Material:

pegmatite of the alkaline-granitic composition

Associated Minerals at Type Locality:

Reference:

Dusmatov, V.D., Efimov, A.F., Kataeva, Z.T., Khoroshilova, L.A., Yanulov, K.P. (1968) Sogdianite - a new mineral. Doklady Akademii Nauk SSSR: 182: 1176-1177.

Other Language Names for SogdianiteHide

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Relationship of Sogdianite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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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 SogdianiteHide

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References for SogdianiteHide

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Localities for SogdianiteHide

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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.