Tiemannite (original) (raw)
Colour:
Steel-gray to black
Specific Gravity:
8.19 - 8.47
Name:
Named after Johann Carl Wilhelm Ferdinand Tiemann (10 June 1848, Rübeland, Kingdom of Hanover (now Germany) - 14 November 1899, Merano, Austria-Hungary (now Italy)), „Hütteneleve auf der Zorge“, and chemist in Berlin who had found the mineral in 1828. However, J.K.L. Zincken already mentioned "Quecksilberselen" in 1825.
NOTE: The above is what we had on record until this discussion:
https://www.mindat.org/mesg-621295.html
It seems more plausible that this mineral was indeed named after Wilhelm Albrecht Tiemann (1774-1841), grandfather of the above.
Needs more investigation.
Long-form identifier:
mindat:1:1:3957:0
93320ac7-6780-40a3-884e-7ca0c93bbe0c
Approved, 'Grandfathered' (first described prior to 1959)
2.CB.05a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
B : With Zn, Fe, Cu, Ag, etc.
2.8.2.4
2 : SULFIDES
8 : AmXp, with m:p = 1:1
3.5.5
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
5 : Sulphides etc. of Hg and Tl
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Tmn | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Tmn | The Canadian Mineralogist (2019) | The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download |
Colour:
Steel-gray to black
Hardness:
VHN5=22 - 26 kg/mm2 - Vickers
Fracture:
Irregular/Uneven, Conchoidal
Density:
8.19 - 8.47 g/cm3 (Measured) 8.239 g/cm3 (Calculated)
Reflectivity:
| Wavelength | R |
|---|---|
| 400nm | 34.5% |
| 440nm | 35.0% |
| 480nm | 32.7% |
| 520nm | 30.6% |
| 560nm | 29.4% |
| 600nm | 28.8% |
| 640nm | 28.5% |
| 680nm | 28.3% |
| 700nm | 28.2% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 35.0%.
Common Impurities:
Cd,S,Pb
Class (H-M):
43_m_ - Hextetrahedral
Cell Parameters:
a = 6.085 Å
Unit Cell V:
225.31 ų (Calculated from Unit Cell)
Comment:
Synthetic material.
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| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0000050 | Tiemannite | Earley J W (1950) Description and syntheses of the selenide minerals American Mineralogist 35 337-364 |  |
1950 | 0 | 293 | |
| 0018070 | Tiemannite | de Jong W (1926) Die Struktur des Tiemannit und Koloradoit _cod_database_code 1011199 Zeitschrift fur Kristallographie 63 466-472 | 1926 | 0 | 293 | ||
| 0011527 | Tiemannite | Wyckoff R W G (1963) Second edition. Interscience Publishers, New York, New York Crystal Structures 1 85-237 | 1963 | 0 | 293 |
CIF Raw Data - click here to close
Place of Conservation of Type Material:
No designated type material.
Other Members of this group:
Associated Minerals Based on Photo Data:
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
This 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.
- 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). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.