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Tertschite

Formula:
Ca
 
4
B
 
10
O
 
19
·20H
 
2
O
Colour:Snow-white
Name:Named after Hermann Tertsch (1880-1962), professor of mineralogy, University of Vienna (Austria).
This page provides mineralogical data about Tertschite.

Classification of Tertschite

IMA status:Questionable/Doubtful
Strunz 8th edition ID:5/H.16-20
Nickel-Strunz 10th (pending) edition ID:6.EB.20

6 : BORATES
E : Pentaborates
B : Ino-pentaborates
Dana 8th edition ID:26.7.5.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
mindat.org URL:http://www.mindat.org/min-3916.html
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Type Occurrence of Tertschite

Type Locality:Kurtpınarı mine, Faraşköy (Faraş), Bigadiç, Balikesir Province, Marmara Region, Turkey
Year of Discovery:1952

Physical Properties of Tertschite

Lustre:Silky
Colour:Snow-white

Optical Data of Tertschite

Type:Biaxial
RI values: nα = 1.502 nγ = 1.517
Maximum Birefringence:δ = 0.015

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:relatively strong

Chemical Properties of Tertschite

Formula:
Ca
 
4
B
 
10
O
 
19
·20H
 
2
O
Essential elements:B, Ca, H, O
All elements listed in formula:B, Ca, H, O

Relationship of Tertschite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.EB.05Larderellite
(NH
 
4
)B
 
5
O
 
6
(OH)
 
4
6.EB.10Ezcurrite
Na
 
4
B
 
10
O
 
17
·7H
 
2
O
6.EB.15Probertite
NaCaB
 
5
O
 
7
(OH)
 
4
·3H
 
2
O
6.EB.25Priceite
Ca
 
2
B
 
5
O
 
7
(OH)
 
5
·H
 
2
O

Other Names for Tertschite

Other Languages:
German:Tertschit
Spanish:Tertschita

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 Tertschite

Reference List:Fortschritte der Mineralogie (1953), 31, 39-42.

American Mineralogist (1954): 39: 849.

Internet Links for Tertschite

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    Localities for Tertschite

    Hide Locality List
    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.
    (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.
    Turkey
     
    • Marmara Region
      • Balikesir Province
        • Bigadiç
    		CAHIT HELVACI & RICARDO N. ALONSO (2000) Borate Deposits of Turkey and Argentina; A Summary and Geological Comparison. Turkish Journal of Earth Sciences, Vol. 9, 2000, pp. 1-27
          • Faraşköy (Faraş)
    		Fortschritte der Mineralogie (1953), 31, 39-42.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 11th Nov 2009 10:35:54