Telyushenkoite
A valid IMA mineral species
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About Telyushenkoite
Formula:
(Cs,Na,K)Na6[Be2Al3Si15O39]F2
Colour:
Colourless to white
Lustre:
Vitreous
Hardness:
6
Specific Gravity:
2.73
Crystal System:
Trigonal
Member of:
Name:
Honouring Tamara Matveyevna Telyushenko (Тамара Матвеевна Телюшенко) (1930 - 19 January 1997), Professor of Petrography in the Ashkhabad School of Geology.
Unique Identifiers
Mindat ID:
25600
Long-form identifier:
mindat:1:1:25600:3
GUID
(UUID V4):
(UUID V4):
0bdd6638-a792-486a-8fbb-80f7c4a90f4d
IMA Classification of Telyushenkoite
Approved
IMA Formula:
CsNa6Be2Al3Si15O39F2
Approval year:
2001
First published:
2003
Classification of Telyushenkoite
9.EH.25
9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Tys | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Telyushenkoite
Vitreous
Transparency:
Transparent
Colour:
Colourless to white
Streak:
White
Hardness:
6 on Mohs scale
Hardness:
VHN100=696 - 737 kg/mm2 - Vickers
Cleavage:
Distinct/Good
Density:
2.73 g/cm3 (Measured) 2.73 g/cm3 (Calculated)
Optical Data of Telyushenkoite
Type:
Uniaxial (+)
RI values:
nω = 1.526(2) nε = 1.531(2)
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Low
Chemistry of Telyushenkoite
Mindat Formula:
(Cs,Na,K)Na6[Be2Al3Si15O39]F2
Common Impurities:
Zn
Crystallography of Telyushenkoite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3 1m
Setting:
P3 1m
Cell Parameters:
a = 14.377 Å, c = 4.878 Å
Ratio:
a:c = 1 : 0.339
Unit Cell V:
873.19 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Equant grains to 2 cm.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005761 | Telyushenkoite | Sokolova E V, Huminicki D M C, Hawthorne F C, Agakhanov A A, Pautov L A, Grew E S (2002) The crystal chemistry of telyushenkoite and leifite, A Na6[Be2Al3Si15O39F2], A = Cs, Na The Canadian Mineralogist 40 183-192 |  | 2002 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.15 Å | (50) |
| 3.38 Å | (75) |
| 3.16 Å | (100) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Telyushenkoite
General Appearance of Type Material:
Angular grains to 2 cm.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia.
Geological Setting of Type Material:
Inclusions in coarse-grained blocks consisting mainly of reedmergnerite.
Associated Minerals at Type Locality:
Reference:
Agakhanov, A.A., Pautov, L.A., Belakovskiy, D.I., Sokolova, E.V., Hawthorne, F.C. (2003) Telyushenkoite CsNa6[Be2(Si,A1,Zn)18O39F2] - a new cesium mineral of the leifite group. New Data on Minerals. Moscow: 38: 5-8.
Synonyms of Telyushenkoite
Other Language Names for Telyushenkoite
Relationship of Telyushenkoite to other Species
Member of:
Other Members of this group:
Common Associates
Associated Minerals Based on Photo Data:
| 6 photos of Telyushenkoite associated with Reedmergnerite | NaBSi3O8 |
| 4 photos of Telyushenkoite associated with Shibkovite | K(◻K)Ca2Zn3[Si12O30] |
Related Minerals - Strunz-mindat Grouping
| 9.EH.05 | Manganoneptunite | KNa2Li(Mn2+)2Ti2[Si4O12]2 |
| 9.EH.05 | Neptunite | KNa2Li(Fe2+)2Ti2[Si4O12]2 |
| 9.EH.05 | Watatsumiite | KNa2Li(Mn2+)2V4+2[Si4O12]2 |
| 9.EH.05 | Magnesioneptunite | KNa2Li(Mg)2Ti2[Si4O12]2 |
| 9.EH.05 | Rotherkopfite | KNa2Fe2+(Fe2+)2(Ti1.5Fe2+0.5)[Si4O12]2 |
| 9.EH.10 | Grumantite | Na(HSi2O5) · H2O |
| 9.EH.15 | Sarcolite | Na4Ca12Al8Si12O46(SiO4,PO4)(OH,H2O)4(CO3,Cl) |
| 9.EH.20 | Ussingite | Na2AlSi3O8OH |
| 9.EH.25 | Leifite | (Na,H2O)Na6[Be2Al2(Al,Si)Si15O39]F2 |
| 9.EH.25 | Eirikite | KNa6Be2(Si15Al3)O39F2 |
| 9.EH.30 | Nafertisite | Na3Fe2+10Ti2(Si6O17)2O2(OH)6F(H2O)2 |
| 9.EH.35 | Veblenite | KNa(Fe2+5Fe3+4Mn7)Nb4(Si2O7)2(Si8O22)2O6(OH)10(H2O)3 |
Fluorescence of Telyushenkoite
Weak lilac fluorescence in short-wave UV light.
Other Information
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 Telyushenkoite
mindat.org URL:
https://www.mindat.org/min-25600.html
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References for Telyushenkoite
Reference List:
Sokolova, E., Huminicki, D. M.C., Hawthorne, F. C., Agakhanov, A. A., Pautov, L. A., Grew, E. S. (2002) The crystal chemistry of telyushenkoite and leifite, ANa6[Be2Al3Si15O39F2], A = Cs, Na. The Canadian Mineralogist, 40 (1) 183-192 doi:10.2113/gscanmin.40.1.183
Agakhanov, Atali A., Pautov, Leonid A., Belakovskiy, Dmitriy I., Sokolova, Elena V., Hawthorne, Frank C. (2003) Telyushenkoite CsNa6[Be2(Si,Al,Zn)18O39F2] – a new cesium mineral of the leifite group. New Data on Minerals, 38. Moscow. 5-8
Localities for Telyushenkoite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Tajikistan (TL) | |
| Agakhanov et al. (2003) +1 other reference |
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Dara-i-Pioz Massif, Districts of Republican Subordination, Tajikistan