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Telyushenkoite

Big Photo

Darai-Pioz (Dara-i-Pioz; Dara-Pioz) Glacier, Alai (Alayskiy) Range, Tien Shan Mts, Region of Republican Subordination, Tajikistan
© Knut Eldjarn

Formula:
(Cs,Na,K)Na
 
6
[F
 
2
|Be
 
2
Al
 
3
Si
 
15
O
 
39
]
System:TrigonalColour:colourless to white
Hardness:6
Name:Honouring Tamara Matveyevna Telyushenko (1930-1997), Professor of Petrography in the Ashkhabad School of Geology.


Leifite Group.
The cesium analogue of leifite and eirikite.

Classification of Telyushenkoite

IMA status:Approved 2001
Strunz 8th edition ID:8/J.10-20
Nickel-Strunz 10th (pending) edition ID:9.EH.25

9 : SILICATES (Germanates)
E : Phyllosilicates
H : Transitional structures between phyllosilicate and other silicate units
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Type Occurrence of Telyushenkoite

Type Locality:Darai-Pioz (Dara-i-Pioz; Dara-Pioz) Glacier, Alai (Alayskiy) Range, Tien Shan Mts, Region of Republican Subordination, Tajikistan
General Appearance of Type Material:angular grains to 2 cm
Geological Setting of type material:inclusions in coarse-grained blocks consisting mainly of reedmergnerite
Associated Minerals at type locality:
ShibkoviteReedmergneritePolylithionitePectoliteNordite-(Ce)
MicroclineKentbrooksiteHyalotekiteAlbite

Physical Properties of Telyushenkoite

Lustre:Vitreous
Colour:colourless to white
Streak:white
Hardness (Mohs):6
Cleavage:Distinct/Good
Density (measured):2.73 g/cm3

Crystallography of Telyushenkoite

Crystal System:Trigonal
Class (H-M):3m (3 2/m) - Hexagonal Scalenohedral
Cell Parameters:a = 14.37Å, c = 4.878Å
Ratio:a:c = 1 : 0.339
Unit Cell Volume:V 872.34 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
4.15 (50)
3.38 (75)

Chemical Properties of Telyushenkoite

Formula:
(Cs,Na,K)Na
 
6
[F
 
2
|Be
 
2
Al
 
3
Si
 
15
O
 
39
]
All elements listed in formula:Al, Be, Cs, F, K, Na, O, Si
Common Impurities:Zn

Relationship of Telyushenkoite to other Species

Member of Group:
Leifite Group:
Related Minerals - Nickel-Strunz Grouping):

- +
9.EH.05Manganoneptunite
Na
 
2
KLi(Mn
2+
 
,Fe
2+
 
)
 
2
Ti
 
2
[Si
 
8
O
 
24
]
9.EH.05Neptunite
Na
 
2
KLi(Fe
2+
 
,Mn
2+
 
)
 
2
Ti
 
2
[Si
 
8
O
 
24
]
9.EH.05Watatsumiite
Na
 
2
KLi(Mn
2+
 
,Fe
2+
 
)
 
2
V
4+
2
[Si
 
8
O
 
24
]
9.EH.05IMA2009-009
KNa
 
2
Li(Mg,Fe)
 
2
Ti
 
2
Si
 
8
O
 
24
9.EH.10Grumantite
Na[Si
 
2
O
 
4
(OH)]·H
 
2
O
9.EH.15Sarcolite
Na
 
2
Ca
 
12
(Ca,K,Fe,Sr,Mg)
 
2
Al
 
8
Si
 
12
(P,Si)O
 
52
F
 
2
9.EH.20Ussingite
Na
 
2
AlSi
 
3
O
 
8
OH
9.EH.25Leifite
(Na,H
 
2
O)Na
 
6
[F
 
2
|Be
 
2
Al
 
2
(Al,Si)Si
 
15
O
 
39
]
9.EH.25Eirikite
KNa
 
6
Be
 
2
(Si
 
15
Al
 
3
)O
 
39
F
 
2
9.EH.30Nafertisite
Na
 
3
(Fe
2+
 
,Fe
3+
 
)
 
6
(Ti
 
2
Si
 
12
O
 
34
)(O,OH)
 
7
·2H
 
2
O

Other Names for Telyushenkoite

Synonyms:
IMA2001-012
Other Languages:
Russian:Телюшенкоит

Other Information

Fluorescence in UV light:weak lilac fluorescence in short-wave UV light
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Telyushenkoite

Reference List:Sokolova E. et al. (2002), Canadian Mineralogist: 40: 183-192.

Agakhanov A.A. et al. (2003), New Data on Minerals, 38, 5-8.

Internet Links for Telyushenkoite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
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    Localities for Telyushenkoite

    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Tajikistan
     
    • Region of Republican Subordination
      • Tien Shan Mts
        • Alai (Alayskiy) Range
    		Lapis 29(1), 47 (2004); Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 132(6): 15-21 (in Russian).
    Mineral and/or Locality
    Google
     
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