Palladothallite
A valid IMA mineral species
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Formula:
Pd3Tl
Specific Gravity:
13.04 (Calculated)
Crystal System:
Tetragonal
Name:
Named for the composition that includes palladium and thallium.
Known synthetic analogue. ZrAl3 structure type.
Unique Identifiers
Mindat ID:
55235
Long-form identifier:
mindat:1:1:55235:0
IMA Classification of Palladothallite
Classification of Palladothallite
1.AG.
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
A : Metals and Intermetallic Alloys
G : PGE-metal alloys
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 |
|---|---|---|
| Pdt | 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 Palladothallite
Transparency:
Opaque
Density:
13.04 g/cm3 (Calculated)
Optical Data of Palladothallite
Anisotropism:
Anisotropy not observed
Reflectivity:
| Wavelength | R1 (%) |
|---|---|
| 470nm | 53.9% |
| 546nm | 57.1% |
| 589nm | 59.4% |
| 650nm | 61.7% |
Graph shows reflectance levels at different wavelengths (in nm). Peak reflectance is 61.7%.
Colour in reflected light:
White
Internal Reflections:
Not observed
Chemistry of Palladothallite
Mindat Formula:
Pd3Tl
Elements listed:
Crystallography of Palladothallite
Crystal System:
Tetragonal
Class (H-M):
4/mmm(4/m2/m2/m) - Ditetragonal Dipyramidal
Space Group:
I4/mmm
Setting:
I4/mmm
Cell Parameters:
a = 4.10659(9) Å, c = 15.3028(4) Å
Ratio:
a:c = 1 : 3.726
Unit Cell V:
258.07 ų
Z:
4
Comment:
Crystal structure of the synthetic counterpart solved by Kurtzemann & Kohlmann (2010), from powder neutron diffraction data.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.313 Å | (100) |
| 2.053 Å | (34) |
| 1.913 Å | (13) |
| 1.452 Å | (9) |
| 1.400 Å | (15) |
| 1.230 Å | (18) |
| 1.168 Å | (7) |
| 1.156 Å | (7) |
Comments:
From Type Description.
Type Occurrence of Palladothallite
General Appearance of Type Material:
Anhedral grains, ca. 1 to 20 μm in size, intergrown with bortnikovite; both constitute "rims around tulameenite (...), Pt-Pd-Fe-Cu alloys, and Pt-Pd-Fe-Cu “oxides”, in a goethite matrix".
Place of Conservation of Type Material:
Type material is deposited in the mineralogical collections of the Department of Earth Sciences, Natural History Museum, Cromwell Road, South Kensington, London SW7 5BD, United Kingdom, catalogue number BM2019,1.
Geological Setting of Type Material:
Orthopyroxenite bearing disseminated Ni-Cu-Fe sulfides; "in near-surface oxidized ore of an orthopyroxenite unit".
Synonyms of Palladothallite
Other Language Names for Palladothallite
Dutch:Palladothalliet
German:Palladothallit
Related Minerals - Strunz-mindat Grouping
| 1.AG. | Sluzhenikinite | Pd15(Sb7-xSnx) |
| 1.AG. | Driekopite | PtBi |
| 1.AG. | Sidorovite | Fe3Pt |
| 1.AG. | Michitoshiite-(Cu) | Rh(Cu1-xGex) |
| 1.AG.05 | Hexaferrum | (Fe,Os,Ru,Ir) |
| 1.AG.05 | Garutiite | (Ni,Fe,Ir) |
| 1.AG.10 | Zvyagintsevite | Pd3Pb |
| 1.AG.10 | Rustenburgite | (Pt,Pd)3Sn |
| 1.AG.10 | Atokite | (Pd,Pt)3Sn |
| 1.AG.15 | Taimyrite | (Pd,Cu,Pt)3Sn |
| 1.AG.15 | Tatyanaite | (Pt,Pd,Cu)9Cu3Sn4 |
| 1.AG.20 | Paolovite | Pd2Sn |
| 1.AG.25 | Stannopalladinite | (Pd,Cu)3Sn |
| 1.AG.25 | Plumbopalladinite | Pd3Pb2 |
| 1.AG.30 | Cabriite | Pd2CuSn |
| 1.AG.35 | Isoferroplatinum | Pt3Fe |
| 1.AG.35 | Chengdeite | Ir3Fe |
| 1.AG.40 | Tetraferroplatinum | PtFe |
| 1.AG.40 | Tulameenite | Pt2CuFe |
| 1.AG.40 | Ferronickelplatinum | Pt2FeNi |
| 1.AG.45 | Skaergaardite | PdCu |
| 1.AG.45 | Hongshiite | PtCu |
| 1.AG.50 | Yixunite | Pt3In |
| 1.AG.55 | Damiaoite | PtIn2 |
| 1.AG.60 | Niggliite | PtSn |
| 1.AG.65 | Bortnikovite | Pd4Cu3Zn |
| 1.AG.70 | Nielsenite | PdCu3 |
| 1.AG.75 | Norilskite | (Pd,Ag)2xPb (x = 0.08 - 0.11) |
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 Palladothallite
mindat.org URL:
https://www.mindat.org/min-55235.html
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References for Palladothallite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 58. European Journal of Mineralogy, 32 (6) 645-651 doi:10.5194/ejm-32-645-2020
Localities for Palladothallite
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.
Russia | |
| Sobolev et al. (2025) |
| Grokhovskaya +5 other references |
