Tertschite
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About Tertschite
Formula:
Ca4B10O19 · 20H2O
Colour:
Snow-white
Lustre:
Silky
Name:
Named in honor of Hermann Julius Tertsch (18 February 1880, Starý Petřín, Czech Republic - 14 December 1962, Vienna, Austria), professor of mineralogy, University of Vienna, Austria.
This page provides mineralogical data about Tertschite.
Classification of Tertschite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
5/H.16-20
6.EB.20
6 : BORATES
E : Pentaborates
B : Ino-pentaborates
6 : BORATES
E : Pentaborates
B : Ino-pentaborates
26.7.5.1
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
Physical Properties of Tertschite
Silky
Colour:
Snow-white
Optical Data of Tertschite
Type:
Biaxial
RI values:
nα = 1.502 nγ = 1.517
Max Birefringence:
δ = 0.015

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:
Moderate
Dispersion:
relatively strong
Chemical Properties of Tertschite
Formula:
Ca4B10O19 · 20H2O
Elements listed:
Type Occurrence of Tertschite
Other Language Names for Tertschite
German:Tertschit
Spanish:Tertschita
Related Minerals - Nickel-Strunz Grouping
6.EB.05 | Larderellite | (NH4)B5O7(OH)2 · H2O | Mon. |
6.EB.10 | Ezcurrite | Na4B10O17 · 7H2O | Tric. 1 : P1 |
6.EB.15 | Probertite | NaCaB5O7(OH)4 · 3H2O | Mon. 2/m |
6.EB.25 | Priceite | Ca2B5O7(OH)5 · H2O | Mon. 2/m : P21/b |
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.
References for Tertschite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Meixner, H. (1952) Der Karinthin: 18: 144-146. [http://www.landesmuseum.at/pdf_frei_remote/DerKarinthin_18_0001-0023.pdf]
Meixner, H. (1953) Einige Boratminerale (Colemanit und Tertschit, ein neues Mineral) aus der Türkei. Fortschritte der Mineralogie: 31: 39-42.
Fleischer, M. (1954) New mineral names. American Mineralogist: 39: 848-852.
Internet Links for Tertschite
mindat.org URL:
https://www.mindat.org/min-3916.html
Please feel free to link to this page.
Please feel free to link to this page.
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Localities for Tertschite
Locality List




All localities listed without proper references should be considered as questionable.
Turkey | |
| 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 |
| Fortschritte der Mineralogie (1953), 31, 39-42. |
Kurtpınarı mine, Faraşköy, Bigadiç, Balikesir Province, Marmara Region, Turkey