Tilkerodeite
A valid IMA mineral species
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About Tilkerodeite
Formula:
Pd2HgSe3
Colour:
Black or gray
Lustre:
Metallic
Hardness:
3
Specific Gravity:
9.67 (Calculated)
Crystal System:
Trigonal
Name:
Named for the type locality of Tilkerode, Germany, which is the most important selenide-bearing occurrence in that country.
Type Locality:
Isostructural with:
The Pd analogue of jacutingaite. Not chemically unique among the approved minerals: compare tischendorfite.
Note: not to be confused with 'tilkerodite (of Haidinger)'.
Note: not to be confused with 'tilkerodite (of Haidinger)'.
Unique Identifiers
Mindat ID:
54348
Long-form identifier:
mindat:1:1:54348:6
GUID
(UUID V4):
(UUID V4):
e4003c89-84ef-429b-bb96-d3bc1eccd4ea
IMA Classification of Tilkerodeite
Approved
First published:
2020
Classification of Tilkerodeite
2.CC.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
C : Metal Sulfides, M: S = 1: 1 (and similar)
C : With Ni, Fe, Co, PGE, etc.
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Tkr | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Tilkerodeite
Metallic
Transparency:
Opaque
Colour:
Black or gray
Streak:
Black
Hardness:
3 on Mohs scale
Comment:
Estimated from the polishing hardness relative to clausthalite
Tenacity:
Flexible
Cleavage:
Perfect
{001}
{001}
Density:
9.67 g/cm3 (Calculated)
Optical Data of Tilkerodeite
Anisotropism:
Weak shades of greenish-brown and grey-brown
Bireflectance:
Weak
Colour in reflected light:
Brownish-grey
Pleochroism:
Weak
Comments:
Shades of light-brown and grey
Chemistry of Tilkerodeite
Mindat Formula:
Pd2HgSe3
Elements listed:
Crystallography of Tilkerodeite
Crystal System:
Trigonal
Class (H-M):
3m (3 2/m) - Hexagonal Scalenohedral
Space Group:
P3m1
Setting:
P3m1
Cell Parameters:
a = 7.325 Å, c = 5.288 Å
Ratio:
a:c = 1 : 0.722
Unit Cell V:
245.7 Ă
Âł
Z:
2
Comment:
stds not reported
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.288 Ă | (9) |
| 2.720 Ă | (100) |
| 2.031 Ă | (34) |
| 1.831 Ă | (37) |
| 1.519 Ă | (19) |
| 1.360 Ă | (10) |
| 1.270 Ă | (10) |
| 1.169 Ă | (15) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| High-đ alteration and/or metamorphism | |
| 33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) |
Type Occurrence of Tilkerodeite
General Appearance of Type Material:
euhedral inclusions in tiemannite or as extremely fine-grained lamellar aggregates (to 3 ”m) in a dolomiteâankerite matrix
Place of Conservation of Type Material:
Collections of the Mineralogical Institute, Technische UniversitÀt Bergakademie Freiberg, Freiberg, Germany, inventory number MiSa84670
Geological Setting of Type Material:
Selenide deposit
Associated Minerals at Type Locality:
Reference:
Ma, C., Förster, H.-J., Grundmann, G. (2020) Tilkerodeite, Pd2HgSe3, a New Platinum-Group Mineral from Tilkerode, Harz Mountains, Germany. Crystals: 10(687): 1-9.
Synonyms of Tilkerodeite
Common Associates
Associated Minerals Based on Photo Data:
| 7 photos of Tilkerodeite associated with Jacutingaite | Pt2HgSe3 |
| 7 photos of Tilkerodeite associated with Clausthalite | PbSe |
| 5 photos of Tilkerodeite associated with Stibiopalladinite | Pd5Sb2 |
| 4 photos of Tilkerodeite associated with Gold | Au |
| 3 photos of Tilkerodeite associated with Tiemannite | HgSe |
| 1 photo of Tilkerodeite associated with Chrisstanleyite | Ag2Pd3Se4 |
| 1 photo of Tilkerodeite associated with Tischendorfite | Pd8Hg3Se9 |
| 1 photo of Tilkerodeite associated with Hematite | Fe2O3 |
Related Minerals - Strunz-mindat Grouping
| 2.CC. | UM2007-26-S:CuFeIrNiPtRh | (Ir,Cu,Ni,Pt,Rh,Fe)9S11 |
| 2.CC. | Crowningshieldite | (Ni0.9Fe0.10)S |
| 2.CC. | Eliopoulosite | V7S8 |
| 2.CC. | Kuvaevite | Ir5Ni10S16 |
| 2.CC. | Torryweiserite | Rh5Ni10S16 |
| 2.CC. | Tamuraite | Ir5Fe10S16 |
| 2.CC. | Ferrotorryweiserite | Rh5Fe10S16 |
| 2.CC.05 | AchĂĄvalite | FeSe |
| 2.CC.05 | Breithauptite | NiSb |
| 2.CC.05 | Freboldite | CoSe |
| 2.CC.05 | Kotulskite | Pd(Te,Bi)2-x (x â 0.4) |
| 2.CC.05 | Langisite | CoAs |
| 2.CC.05 | Nickeline | NiAs |
| 2.CC.05 | Sederholmite | beta-NiSe |
| 2.CC.05 | Sobolevskite | PdBi |
| 2.CC.05 | Stumpflite | PtSb |
| 2.CC.05 | Sudburyite | PdSb |
| 2.CC.05 | Jaipurite | CoS |
| 2.CC.05 | Zlatogorite | NiCuSb2 |
| 2.CC.10 | Pyrrhotite | Fe1-xS |
| 2.CC.10 | Smythite | (Fe,Ni)3+xS4 (x=0-0.3) |
| 2.CC.10 | Troilite | FeS |
| 2.CC.15 | Cherepanovite | RhAs |
| 2.CC.15 | Modderite | (Co,Fe)As |
| 2.CC.15 | Ruthenarsenite | (Ru,Ni)As |
| 2.CC.15 | Westerveldite | (Fe,Ni,Co)As |
| 2.CC.15 | Minakawaite | RhSb |
| 2.CC.20 | Millerite | NiS |
| 2.CC.20 | MĂ€kinenite | Îł-NiSe |
| 2.CC.20 | UM1990-38-S:CuFeIrNiPtRh | (Ni,Fe,Rh,Cu,Ir,Pt)S |
| 2.CC.25 | Mackinawite | FeS |
| 2.CC.30 | Hexatestibiopanickelite | (Pd,Ni)(Sb,Te) ? |
| 2.CC.30 | VavĆĂnite | Ni2SbTe2 |
| 2.CC.35a | Braggite | PdPt3S4 |
| 2.CC.35b | Cooperite | PtS |
| 2.CC.35a | Vysotskite | PdS |
| 2.CC.45 | Jacutingaite | Pt2HgSe3 |
| 2.CC.50 | Imgreite | NiTe (?) |
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.
Internet Links for Tilkerodeite
mindat.org URL:
https://www.mindat.org/min-54348.html
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References for Tilkerodeite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) - Newsletter 54. European Journal of Mineralogy, 32 (2) 275-283 doi:10.5194/ejm-32-275-2020
Localities for Tilkerodeite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Germany (TL) | |
| Ma et al. (2020) |
UK | |
| Paar et al. (1998) |
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Eskaborn adit, Tilkerode Mining District, Mansfeld, Mansfeld-SĂŒdharz, Saxony-Anhalt, Germany