Tertschite
A valid IMA mineral species - grandfathered - questionable
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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
GUID
(UUID V4):
(UUID V4):
750d7744-a431-4228-82ca-6ed433958f21
IMA Classification of Tertschite
Approved, 'Grandfathered' (first described prior to 1959), Questionable
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 |
|---|---|---|
| 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
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
Chemistry of Tertschite
Mindat Formula:
Ca4B10O19 · 20H2O
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:
Reference:
Meixner, H. (1953) Einige Boratminerale (Colemanit und Tertschit, ein neues Mineral) aus der Türkei. Fortschritte der Mineralogie: 31: 39-42.
Other Language Names for Tertschite
German:Tertschit
Spanish:Tertschita
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.
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External Links:
Mineral Dealers:
References for Tertschite
Reference List:
Localities for Tertschite
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 |
| Fortschritte der Mineralogie (1953) |
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Kurtpınarı mine, Faraşköy, Bigadiç District, Balikesir Province, Turkey