Tertschite
A valid IMA mineral species - grandfathered - questionable
This page is currently not sponsored. Click here to sponsor this page.
About Tertschite
Hermann J. Tertsch
Formula:
Ca4B10O19 · 20H2O
Colour:
Snow-white
Lustre:
Silky
Crystal System:
Monoclinic
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.
Unique Identifiers
Mindat ID:
3916
Long-form identifier:
mindat:1:1:3916:7
IMA Classification of Tertschite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
Ca4B10O19·20H2O
Classification of Tertschite
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
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Trt | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Tertschite
Optical Data of Tertschite
Type:
Biaxial
RI values:
nα = 1.502 nγ = 1.517
Max. Birefringence:
δ = 0.015
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
relatively strong
Chemistry of Tertschite
Mindat Formula:
Ca4B10O19 · 20H2O
Element Weights:
Elements listed:
Crystallography of Tertschite
Crystal System:
Monoclinic
Comment:
Questionable
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Near-surface Processes | |
| 25 : Evaporites (prebiotic) |
Type Occurrence of Tertschite
General Appearance of Type Material:
As finely fibrous crystalline aggregates.
Place of Conservation of Type Material:
National School of Mines, Paris, France; The Natural History Museum, London, England, 1978,489; Royal Ontario Museum, \ Toronto, Canada, M35725; National Museum of Natural History, Washington, D.C., USA, 112733.
Associated Minerals at Type Locality:
Other Language Names for Tertschite
Related Minerals - Strunz-mindat Grouping
| 6.EB.05 | Larderellite | (NH4)B5O7(OH)2 · H2O |
| 6.EB.05 | Yarzhemskiite | K[B5O7(OH)2] · H2O |
| 6.EB.10 | Ezcurrite | Na4B10O17 · 7H2O |
| 6.EB.15 | Probertite | NaCa[B5O7(OH)4] · 3H2O |
| 6.EB.25 | Priceite | Ca2B5O7(OH)5 · H2O |
Fluorescence of Tertschite
fluoresces pale to dark blue-violet under UV.
Other Information
Notes:
Slightly soluble in hot H2O;
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
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.
Search Engines:
External Links:
Mineral Dealers:
References for Tertschite
Reference List:
Localities for Tertschite
Showing 2 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Turkey | |
| Helvaci +2 other references |
| Meixner (1953) |
Quick NavTopAbout TertschiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Geological EnvironmentType Occurrence Other LanguagesStrunz-MindatFluorescence Other InformationInternet Links References Localities Locality List
Kurtpınarı mine, Faraşköy, Bigadiç District, Balikesir Province, Turkey