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Tyretskite

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Big Photo

Inder B deposit and salt dome, Atyrau (Gur'yev), Atyrau Province (Atyrau Oblysy; Atyrau Oblast'), Kazakhstan
© 2008, JGW




Formula:
Ca
 
2
B
 
5
O
 
9
OH · H
 
2
O
System:TriclinicColour:White, light brown
Hardness:5
Member of:Hilgardite Group
Name:Named after its discovery locality, Tyret' station, Irkutian region, Russia.


Hilgardite Group.

Classification of Tyretskite

IMA status:Approved
Strunz 8th edition ID:5/K.04-30
Nickel-Strunz 10th (pending) edition ID:6.ED.05

6 : BORATES
E : Pentaborates
D : Tekto-pentaborates
Dana 8th edition ID:26.5.15.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
Hey's CIM Ref.:9.3.9

9 : Borates
3 : Borates of Ca and Sr
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Type Occurrence of Tyretskite

Type Locality:Tyret' railway station, Lena-Angara salt Basin, Irkutskaya Oblast', Prebaikalia (Pribaikal'e), Eastern-Siberian Region, Russia

Physical Properties of Tyretskite

Lustre:Vitreous
Colour:White, light brown
Streak:White
Hardness (Mohs):5

Crystallography of Tyretskite

Crystal System:Triclinic

Optical Data of Tyretskite

Type:Biaxial (+)
RI values: nα = 1.637 nβ = 1.650 nγ = 1.670
2V:Measured: 46° , Calculated: 80°
Maximum Birefringence:δ = 0.033

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r > v or r < v

Chemical Properties of Tyretskite

Formula:
Ca
 
2
B
 
5
O
 
9
OH · H
 
2
O
Essential elements:B, Ca, H, O
All elements listed in formula:B, Ca, H, O

Relationship of Tyretskite to other Species

Member of:Hilgardite Group
Other Members of Group:

- +
Hilgardite
Ca
 
2
B
 
5
O
 
9
Cl · H
 
2
O
Kurgantaite
CaSr[B
 
5
O
 
9
]Cl · H
 
2
O
Leucostaurite
Pb
 
2
[B
 
5
O
 
9
]Cl · 0.5H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- +
6.ED.05Hilgardite
Ca
 
2
B
 
5
O
 
9
Cl · H
 
2
O
6.ED.05Kurgantaite
CaSr[B
 
5
O
 
9
]Cl · H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
9.3.1Calciborite
Ca(B
 
2
O
 
4
)
9.3.2Sibirskite
Ca
 
2
(HB
 
2
O
 
5
)(OH)
9.3.3Fabianite
CaB
 
3
O
 
5
OH
9.3.4Uralborite
Ca
 
2
[B
 
3
O
 
3
(OH)
 
5
 · OB(OH)
 
3
]
9.3.5Vimsite
CaB
 
2
O
 
2
(OH)
 
4
9.3.6Olshanskyite
Ca
 
3
[B(OH)
 
4
]
 
4
(OH)
 
2
9.3.7Frolovite
Ca[B(OH)
 
4
]
 
2
9.3.8Korzhinskite
Ca(B
 
2
O
 
4
) · H
 
2
O
9.3.10Nifontovite
Ca(B
 
2
O
 
4
) · 2.3H
 
2
O
9.3.12Inyoite
Ca(H
 
4
B
 
3
O
 
7
)(OH) · 4H
 
2
O
9.3.13Gowerite
Ca[B
 
5
O
 
8
(OH)][B(OH)
 
3
] · 3H
 
2
O
9.3.14Colemanite
Ca[B
 
3
O
 
4
(OH)
 
3
] · H
 
2
O
9.3.15Pentahydroborite
CaB
 
2
O(OH)
 
6
 · 2H
 
2
O
9.3.16Hexahydroborite
Ca[B(OH)
 
4
]
 
2
 · 6H
 
2
O
9.3.17Meyerhofferite
Ca
 
2
(H
 
3
B
 
3
O
 
7
)
 
2
 · 4H
 
2
O
9.3.18Priceite
Ca
 
2
B
 
5
O
 
7
(OH)
 
5
 · H
 
2
O
9.3.19Ginorite
Ca
 
2
B
 
14
O
 
23
 · 8H
 
2
O
9.3.20Probertite
NaCaB
 
5
O
 
7
(OH)
 
4
 · 3H
 
2
O
9.3.21Ulexite
NaCa[B
 
5
O
 
6
(OH)
 
6
] · 5H
 
2
O
9.3.22Hydroboracite
CaMg[B
 
3
O
 
4
(OH)
 
3
]
 
2
 · 3H
 
2
O
9.3.23Inderborite
CaMg(H
 
3
B
 
3
O
 
7
)
 
2
 · 8H
 
2
O
9.3.24Wardsmithite
Ca
 
5
Mg[B
 
4
O
 
7
]
 
6
 · 30H
 
2
O
9.3.25Henmilite
Ca
 
2
Cu[B(OH)
 
4
]
 
2
(OH)
 
4
9.3.26Strontioborite
SrB
 
8
O
 
11
(OH)
 
4
9.3.27Veatchite
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
 · H
 
2
O
9.3.28Veatchite-A
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
 · H
 
2
O
9.3.29 P-Veatchite
9.3.30 Balavinskite
Sr
 
2
B
 
6
O
 
11
 · 4H
 
2
O
9.3.31Tunellite
SrB
 
6
O
 
9
(OH)
 
2
 · 3H
 
2
O
9.3.32Strontioginorite
(Sr,Ca)
 
2
B
 
14
O
 
23
 · 8H
 
2
O

Other Names for Tyretskite

Other Languages:
German:Tyretskit
Spanish:Tyretskita

Polytypes for Tyretskite

Polytypes:
Tyretskite-1A

Other Information

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 Tyretskite

Reference List:

- +
American Mineralogist (1968): 53: 2084-2087.

American Mineralogist (1985): 70: 636-637.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Tyretskite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Tyretskite details from Handbook of Mineralogy (PDF) [Link dead]
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    • Localities for Tyretskite

    The 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.
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    (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.
    Kazakhstan
     
    • Atyrau Province (Atyrau Oblysy; Atyrau Oblast')
      • Atyrau (Gur'yev)
    		World of Stones #1
    Russia
     
    • Eastern-Siberian Region
      • Prebaikalia (Pribaikal'e)
        • Irkutskaya Oblast'
          • Lena-Angara salt Basin
    		Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 19th Jun 2011 07:44:52
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