General Palladseite Information
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Chemical Formula: |
Pd17Se15 |
Composition: |
Molecular Weight = 2,993.54 gm |
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Palladium 60.43 % Pd |
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Selenium 39.57 % Se |
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______ |
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100.00 % |
Empirical Formula: |
Pd17Se15 |
Environment: |
Residual concentrates from gold washings. |
IMA Status: |
Approved IMA 1977 |
Locality: |
Itabira, Minas Gerais, Brazil Link to MinDat.org Location Data. |
Name Origin: |
Named for the composition, PALLADium and SElenium. |
Synonym: |
ICSD 23907 |
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PDF 29-1437 |
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Palladseite Image |
Images:
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Palladseite Crystallography
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Cell Dimensions: |
a = 10.606, Z = 2; V = 1,193.04 Den(Calc)= 8.33 |
Crystal System: |
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m |
X Ray Diffraction: |
By Intensity(I/Io): 1.875(1), 3.198(1), 2.041(0.81), |
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Physical Properties of Palladseite
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Color: |
White. |
Density: |
8.3 |
Diaphaniety: |
Opaque |
Habit: |
Granular - Generally occurs as anhedral to subhedral crystals in matrix. |
Hardness: |
4.5-5 - Near Apatite |
Luster: |
Metallic |
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Optical Properties of Palladseite
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RL Color: |
White in air, light gray in oil. |
Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Palladseite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
42.40 |
 |
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| 420 nm |
42.80 |
 |
| 440 nm |
43.30 |
 |
| 460 nm |
43.80 |
 |
| 480 nm |
44.30 |
 |
| 500 nm |
44.80 |
 |
| 520 nm |
45.40 |
 |
| 540 nm |
45.70 |
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| 560 nm |
45.80 |
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| 580 nm |
45.70 |
 |
| 600 nm |
45.60 |
 |
| 620 nm |
45.60 |
 |
| 640 nm |
45.60 |
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| 660 nm |
45.70 |
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| 680 nm |
45.80 |
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| 700 nm |
46.20 |
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Calculated Relative Intensity Colors of Palladseite in Air
Relative Intensity |
0% |
30% |
60% |
90% |
100% |
120% |
150% |
180% |
210% |
| R |
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Calculated Properties of Palladseite
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Electron Density: |
relectron=7.19 gm/cc note: rPalladseite =8.33 gm/cc. |
Fermion Index |
Fermion Index = 0.16502 Boson Index = 0.83498 |
Photoelectric: |
PEPalladseite = 178.67 barns/electron U=PEPalladseite x relectron=1,284.71 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Palladseite is Not Radioactive |
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Palladseite Classification
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Dana Class: |
2.16.19.1 (2)Sulfides - Including Selenides and Tellurides |
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(2.16)with miscellaneous formulae |
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(2.16.19)Dana Group |
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2.16.19.1 Palladseite Pd17Se15 P m3m 4/m 3 2/m |
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2.16.19.2 Miassite! Rh17S15 P m3m 4/m 3 2/m |
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2.16.19.2a Prassoite! Rh17S15(?) P m3m 4/m 3 2/m |
Strunz Class: |
II/B.16-70 II - Sulfides and sulphosalts |
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II/B - Sulfides with metal: sulfur, selenium and tellurium > 1:1, Sulfides with predominant Nickel, Cobalt, Rhodium and Palladium |
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II/B.16 - Pentlandite group |
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II/B.16-10 Pentlandite (Fe,Ni)9S8 F m3m 4/m 3 2/m |
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II/B.16-20 Cobaltpentlandite Co9S8 F m3m 4/m 3 2/m |
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II/B.16-30 Argentopentlandite Ag(Fe,Ni)8S8 F m3m 4/m 3 2/m |
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II/B.16-40 Geffroyite (Ag,Cu,Fe)9(Se,S)8 F m3m 4/m 3 2/m |
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II/B.16-50 Manganese-shadlunite (Mn,Pb)(Cu,Fe)8S8 F m3m 4/m 3 2/m |
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II/B.16-60 Shadlunite (Pb,Cd)(Fe,Cu)8S8 F m3m 4/m 3 2/m |
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II/B.16-70 Palladseite Pd17Se15 P m3m 4/m 3 2/m |
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II/B.16-80 Miassite! Rh17S15 P m3m 4/m 3 2/m |
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II/B.16-80* Prassoite! Rh17S15(?) P m3m 4/m 3 2/m |
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Other Palladseite Information
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References: |
NAME( AntBidBlaNic1) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1) |
See Also: |
Links to other databases for Palladseite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - EUROmin Project
4 -Google Images
5 -Google Scholar
6 -Handbook of Mineralogy (UofA)
7 -MinDAT
8 -MinMax(Deutsch)
9 -MinMax(English)
10 -Mineralienatlas (Deutsch)
11 -QUT Mineral Atlas
12 -École des Mines de Paris
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Print or Cut-and-Paste your Palladseite Specimen Label here :
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Palladseite
Pd17Se15
Dana No: 2.16.19.1 Strunz No: II/B.16-70
Locality:
Notes:
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