Palladosilicide
A valid IMA mineral species
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About Palladosilicide
Formula:
Pd2Si
Colour:
Bright creamy white (in reflected light)
Lustre:
Metallic
Specific Gravity:
9.562 (Calculated)
Crystal System:
Hexagonal
Name:
For the chemical composition.
Type Locality:
Unique Identifiers
Mindat ID:
46528
Long-form identifier:
mindat:1:1:46528:5
GUID
(UUID V4):
(UUID V4):
dfc3ffde-797d-4302-92dd-7ed5c47af43f
IMA Classification of Palladosilicide
Classification of Palladosilicide
1.BB.55
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
B : Silicides
1 : ELEMENTS (Metals and intermetallic alloys; metalloids and nonmetals; carbides, silicides, nitrides, phosphides)
B : Metallic Carbides, Silicides, Nitrides, Phosphides and Hydrides
B : Silicides
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 |
|---|---|---|
| Psl | 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 Palladosilicide
Metallic
Transparency:
Opaque
Colour:
Bright creamy white (in reflected light)
Comment:
Bright creamy white against chromite.
Hardness Data:
Could not be measured
Density:
9.562 g/cm3 (Calculated)
Comment:
Calculated density varies from 9.562 to 9.753 g cm3.
Optical Data of Palladosilicide
Anisotropism:
Weak rotation tints in shades of blue and olive green.
Bireflectance:
Weakly bireflectant.
Reflectivity:
| Wavelength | R1 | R2 | imR1 | imR2 |
|---|---|---|---|---|
| 400nm | 46.4% | 49.2% | 33.1% | 35.5% |
| 420nm | 47.5% | 50.7% | 34.1% | 36.3% |
| 440nm | 48.4% | 51.6% | 35.1% | 37.3% |
| 460nm | 49.3% | 52.4% | 36.0% | 38.3% |
| 470nm | 49.6% | 52.7% | 36.3% | 38.6% |
| 480nm | 49.8% | 53.0% | 36.6% | 38.8% |
| 500nm | 50.4% | 53.5% | 37.0% | 39.1% |
| 520nm | 50.8% | 53.7% | 37.4% | 39.3% |
| 540nm | 51.1% | 53.8% | 37.5% | 39.4% |
| 546nm | 51.2% | 53.8% | 37.6% | 39.5% |
| 560nm | 51.3% | 53.8% | 37.6% | 39.5% |
| 580nm | 51.5% | 53.7% | 37.7% | 39.5% |
| 589nm | 51.6% | 53.7% | 37.8% | 39.5% |
| 600nm | 51.6% | 53.6% | 37.8% | 39.4% |
| 620nm | 51.7% | 53.4% | 37.9% | 39.4% |
| 640nm | 51.7% | 53.3% | 37.9% | 39.3% |
| 650nm | 51.7% | 53.3% | 37.9% | 39.3% |
| 660nm | 51.6% | 53.2% | 37.8% | 39.2% |
| 680nm | 51.5% | 53.0% | 37.7% | 39.1% |
| 700nm | 51.4% | 52.8% | 37.6% | 39.0% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 53.8%.
R1 shown in black, R2 shown in red, imR1 shown in green, imR2 shown in blue
Colour in reflected light:
Bright creamy white against chromite.
Internal Reflections:
None.
Pleochroism:
Non-pleochroic
Comments:
Displays no discernible pleochroism.
Chemistry of Palladosilicide
Mindat Formula:
Pd2Si
Elements listed:
Crystallography of Palladosilicide
Crystal System:
Hexagonal
Class (H-M):
6 m2 - Ditrigonal Dipyramidal
Space Group:
P62m
Setting:
P62m
Cell Parameters:
a = 6.496(5) Å, c = 3.433(4) Å
Ratio:
a:c = 1 : 0.528
Unit Cell V:
125.5 ų
Z:
3
Morphology:
Anhedral to subhedral.
Twinning:
Displays no discernible or twinning
Comment:
Based on synthetic Pd2Si
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
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Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0020847 | Palladosilicide | Nylund A (1966) Some notes on the palladium-silicon system Acta Chemica Scandinavica 20 2381-2386 | 1966 | synthetic | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.35 Å | (vs) |
| 2.16 Å | (s) |
| 2.12 Å | (s) |
| 1.87 Å | (m) |
| 1.71 Å | (m) |
| 1.41 Å | (m) |
| 1.33 Å | (m) |
| 1.21 Å | (m) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 3a: Earth’s earliest Hadean crust | >4.50 |
| 7 : Ultramafic igneous rocks | |
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 37 : Layered igneous intrusions and related PGE minerals |
Type Occurrence of Palladosilicide
General Appearance of Type Material:
Grains from 0.7 to 39.1 µm in diameter.
Place of Conservation of Type Material:
Type material has been deposited in the collections of the Canadian Museum of Nature, Gatineau, Quebec, Canada, catalogue number CMNMC 86891.
Geological Setting of Type Material:
In chromite-rich samples from the Kapalagulu intrusion, Tanzania and in UG-2 chromitite, Bushveld complex, South Africa.
Associated Minerals at Type Locality:
Synonyms of Palladosilicide
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 1.BB. | Zangboite | TiFeSi2 |
| 1.BB. | Brownleeite | MnSi |
| 1.BB. | Kangjinlaite | Ti11Si10 |
| 1.BB. | Toledoite | TiFeSi |
| 1.BB. | Yeite | TiSi |
| 1.BB.05 | Suessite | (Fe,Ni)3Si |
| 1.BB.05 | Mavlyanovite | Mn5Si3 |
| 1.BB.10 | UM2001-18-Si:CuPtSn | (Cu,Pt)4Si |
| 1.BB.10 | Perryite | (Ni,Fe)5(Si,P)2 |
| 1.BB.15 | Naquite | FeSi |
| 1.BB.20 | Linzhiite | FeSi2 |
| 1.BB.25 | Luobusaite | Fe0.84Si2 |
| 1.BB.30 | Gupeiite | Fe3Si |
| 1.BB.35 | Hapkeite | Fe2Si |
| 1.BB.40 | Xifengite | Fe5Si3 |
| 1.BB.45 | Carletonmooreite | Ni3Si |
| 1.BB.65 | Zhiqinite | TiSi2 |
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 Palladosilicide
mindat.org URL:
https://www.mindat.org/min-46528.html
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References for Palladosilicide
Localities for Palladosilicide
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.
South Africa | |
| Cabri et al. (2015) |
Tanzania (TL) | |
| Mineralogical Magazine +2 other references |
Quick NavTopAbout PalladosilicideUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
UG-2 Reef, Bojanala Platinum District Municipality, North West, South Africa