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Tertschite

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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

    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.
    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.
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