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Sogdianite

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Formula:
K(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30]
Simplified formula: Zr2KLi3Si12O30;
end-member formula: Zr22K[Li3Si12O30]
Colour:
Violet, pale pink
Lustre:
Vitreous
Hardness:
7
Crystal System:
Hexagonal
Member of:
Name:
Named after medieval historical name of country where its type locality is - Sogdiana.
Osumilite Group. The Zr analogue of berezanskite and brannockite. The only mineral with dominant K, Li and Zr combined.

Structural characteristics: (1) the A octahedron and T2 tetrahedron are completely occupied by Zr and Li; (2) the dominance of Zr at the T2 site induces the lack of Na at the B site.

Visit gemdat.org for gemological information about Sogdianite.


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Classification of SogdianiteHide

Approved
8/E.22-120
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

Physical Properties of SogdianiteHide

Vitreous
Transparency:
Translucent
Colour:
Violet, pale pink
Hardness:

Optical Data of SogdianiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.608 nε = 1.606
Max Birefringence:
δ = 0.002
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of SogdianiteHide

Formula:
K(□,Na)2Li3(Zr,Fe,Ti)2[Si12O30]

Simplified formula: Zr2KLi3Si12O30;
end-member formula: Zr22K[Li3Si12O30]
IMA Formula:
KZr2(Li3Si12)O30
Idealised Formula:
K□2Li3Zr2[Si12O30]
Common Impurities:
Al,Mn,Mg,Ba

Crystallography of SogdianiteHide

Crystal System:
Hexagonal
Class (H-M):
6/mmm (6/m 2/m 2/m) - Dihexagonal Dipyramidal
Space Group:
P6/mcc
Setting:
P6/mcc
Cell Parameters:
a = 10.08 Å, c = 14.24 Å
Ratio:
a:c = 1 : 1.413
Unit Cell V:
1,253.03 ų (Calculated from Unit Cell)
Z:
2

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
d-spacingIntensity
3.20 (100)
2.90 (100)
4.09 (90)
1.838 (80)
1.326 (80)
1.517 (70)
4.51 (60)

Type Occurrence of SogdianiteHide

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:

Other Language Names for SogdianiteHide

German:Sogdianit
Simplified Chinese:锆锂大隅石
Spanish:Sogdianita
Traditional Chinese:鋯鋰大隅石

Relationship of Sogdianite to other SpeciesHide

Member of:
Other Members of this group:
Agakhanovite-(Y)(YCa)□2KBe3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
AlmaruditeK(□,Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
BerezanskiteK□2Li3(Ti,Zr,Sn)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Brannockite(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DarapiositeK(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
DusmatoviteK(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
EifeliteKNa3Mg4Si12O30Hex.
FriedrichbeckeiteK(□0.5Na0.5)2Mg2Be3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Klöchite(□Na)KFe2+2Zn3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P63/mmc
Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
OftedaliteK(Sc,Ca,Mn2+)22[(Be,Al)3Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
Osumilite-(Mg)KMg2Al3(Al2Si10)O30 Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Roedderite(Na,K)2(Mg,Fe)5Si12O30Hex. 6 m2 : P62c
ShibkoviteK(□,K,Na)2Zn3Ca2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.
Trattnerite□(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
Yagiite(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60Hex. 6/mmm (6/m 2/m 2/m)

Common AssociatesHide

Associated Minerals Based on Photo Data:
Quartz7 photos of Sogdianite associated with Quartz on mindat.org.
Polylithionite2 photos of Sogdianite associated with Polylithionite on mindat.org.
Arfvedsonite2 photos of Sogdianite associated with Arfvedsonite on mindat.org.
Tuhualite1 photo of Sogdianite associated with Tuhualite on mindat.org.
Tienshanite1 photo of Sogdianite associated with Tienshanite on mindat.org.
Zektzerite1 photo of Sogdianite associated with Zektzerite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.CM.05ArmeniteBaCa2Al6Si9O30 · 2H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.CM.05Brannockite(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ChayesiteK(Mg,Fe)4FeSi12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DarapiositeK(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05EifeliteKNa3Mg4Si12O30Hex.
9.CM.05Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
9.CM.05MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite-(Mg)KMg2Al3(Al2Si10)O30 Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
9.CM.05PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05Roedderite(Na,K)2(Mg,Fe)5Si12O30Hex. 6 m2 : P62c
9.CM.05SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.
9.CM.05Yagiite(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60Hex. 6/mmm (6/m 2/m 2/m)
9.CM.05BerezanskiteK□2Li3(Ti,Zr,Sn)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05DusmatoviteK(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05ShibkoviteK(□,K,Na)2Zn3Ca2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05AlmaruditeK(□,Na)2(Mn2+,Fe2+,Mg)2(Be,Al)3[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mmm
9.CM.05Trattnerite□(Fe3+,Mg,Fe2+)2(Mg,Fe2+,Fe3+)3(Si12O30)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.05OftedaliteK(Sc,Ca,Mn2+)22[(Be,Al)3Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CM.10FaizieviteK2Na(Ca6Na)Ti4Li6[F2|Si24O66]Tric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide

63.2.1a.1Brannockite(K,Na)□2Li3(Sn,Zr,Ti)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.2ChayesiteK(Mg,Fe)4FeSi12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.3DarapiositeK(Na,◻,K)2(Li,Zn,Fe)3(Mn,Zr,Y)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.4EifeliteKNa3Mg4Si12O30Hex.
63.2.1a.5Merrihueite(K,Na)2(Fe,Mg)5Si12O30Hex.
63.2.1a.6Osumilite(K,Na)(Fe2+,Mg)2(Al,Fe3+)3(Si,Al)12O30Hex.
63.2.1a.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.9SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.
63.2.1a.10Yagiite(Na,K)3Mg4(Al,Mg)6(Si,Al)24O60Hex. 6/mmm (6/m 2/m 2/m)
63.2.1a.11DusmatoviteK(Na,□)2(Zn,Li)3(Mn2+,Y,Zr)2[Si12O30]Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.12MilariteK2Ca4Al2Be4Si24O60 · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
63.2.1a.14Roedderite(Na,K)2(Mg,Fe)5Si12O30Hex. 6 m2 : P62c

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.1.1PetaliteLiAl(Si4O10)Mon. 2/m : P2/b
16.1.2SpodumeneLiAlSi2O6Mon.
16.1.3EucryptiteLiAlSiO4Trig. 3 : R3
16.1.4VirgiliteLiAlSi2O6Hex. 6 2 2 : P62 2 2
16.1.5Cookeite(Al2Li)Al2(AlSi3O10)(OH)8Mon. 2/m
16.1.6BikitaiteLiAlSi2O6 · H2OTric. 1 : P1
16.1.7LunijianlaiteLi0.7Al6.2(AlSi7O20)(OH,O)10Mon.
16.1.8SwineforditeLi(Al,Li,Mg)4((Si,Al)4O10)2(OH,F)4 · nH2OMon.
16.1.9Holmquistite☐{Li2}{Mg3Al2}(Si8O22)(OH)2Orth.
16.1.13Clino-holmquistite Root Name☐{Li2}{Z2+3Z3+2}(Si8O22)(OH,F,Cl)2Mon.
16.1.14Magnesioholmquistite☐{Li2}{Mg3Al2}(Si8O22)(OH)2
16.1.15BityiteLiCaAl2(AlBeSi2O10)(OH)2Mon. 2/m : B2/b
16.1.17SugiliteK(Na,□)2Li3(Fe,Mn,Al,Zr)2[Si12O30]Hex.

Other InformationHide

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

References for SogdianiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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. [English abstract: American Mineralogist (1969): 54: 1221-1222]
Cooper M A, Hawthorne F C, Grew E S (1999) The crystal chemistry of sogdianite, a milarite-group mineral. American Mineralogist 84, 764-768.
Anthony, J.W., Bideaux, R.A., Bladh, K.W. and Nichols, M.C., Eds. Handbook of Mineralogy, Mineralogical Society of America, Chantilly, VA 20151-1110, USA. http://www.handbookofmineralogy.org/ (2016)
Sokolova, E.V., Hawthorne, F.C., Pautov, L.A. (2000): The crystal chemistry of Li-bearing minerals with the milarite-type structure: the crystal structure of end-member sogdianite. The Canadian Mineralogist: 38: 853-859.

Internet Links for SogdianiteHide

Localities for SogdianiteHide

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

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
South Africa
 
  • Northern Cape Province
    • Kalahari manganese field
      • Hotazel
Michael O’Donoghue, Gems, Sixth Edition (2006), p. 454
Tajikistan (TL)
 
  • Region of Republican Subordination
    • Tien Shan Mtn
      • Alai Range (Alayskiy)
Canadian Mineralogist 42:107-119 (2004); Agakhanov A.A., Pautov L.A., Karpenko V.Yu., Bekenova G.K., Uvarova Y.A. (2011) Orlovite, KLi2 TiSi4 O11F, a new mineral of the mica group New Mineral Data 46:13-19; Agakhanov, A.A., Pautov, L.A., Sokolova, E., Hawthorne, F.C., Karpenko, V.Yu., Siidra, O.I., Muftakhov, V.A. (2016): Odigitriaite, CsNa5Ca5[Si14B2O38]F2, a new cesium borosilicate mineral from the Darai-Pioz alkaline massif, Tajikistan: Description and crystal structure. Mineralogical Magazine, 80, (in press).
USA
 
  • Washington
    • Okanogan Co.
      • Golden Horn Batholith
Micro Probe Volume VI Number 8; Rocks and Minerals, 66:6, p. 456
Mineral and/or Locality  
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