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Arsenopalladinite Mineral Data
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General Arsenopalladinite Information
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 Chemical Formula: |
Pd8(As,Sb)3 |
| Composition: |
Molecular Weight = 1,099.54 gm |
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Antimony 5.54 % Sb |
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Arsenic 17.03 % As |
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Palladium 77.43 % Pd |
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______ |
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100.00 % |
| Empirical Formula: |
Pd8As2.5Sb0.5 |
| Environment: |
Alluvial placers and ultra-basic intrusions. |
| IMA Status: |
Approved IMA 1974 |
| Locality: |
Itabira, Minas Gerias, Brazil. Link to MinDat.org Location Data. |
| Name Origin: |
Named for its composition. |
| Name Pronunciation: |
Arsenopalladinite + Pronunciation  |
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Arsenopalladinite Image |
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Images:
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Isomertieite Arsenopalladinite Gold Bornite
Comments: Light grayish grain of intimately intergrown isomertieite and arsenopalladinite (in the center of the picture), with pale yellow gold and brownish to violet bornite. Polished section (from microprobe analysis) in reflected light.
Location: Noril'sk, Putoran Mts, Taymyrskiy Autonomous Okrug, Eastern-Siberian Region, Russia.
Scale: Picture size 0.1 mm.
© Thomas Witzke / Abraxas-Verlag |
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Images:
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Arsenopalladinite Crystallography
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| Axial Ratios: |
a:b:c =0.5326:1:0.5268 |
| Cell Dimensions: |
a = 7.43, b = 13.95, c = 7.35, Z = 4; alpha = 92.88°, beta = 119.5°, gamma = 87.85° V = 661.75 Den(Calc)= 11.04 |
| Crystal System: |
Triclinic - Pedial H-M Symbol (1) Space Group: P1 |
| X Ray Diffraction: |
By Intensity(I/Io): 2.13(1), 2.34(0.6), 1.41(0.4), |
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Physical Properties of Arsenopalladinite
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| Color: |
Silver white. |
| Density: |
10.4 |
| Diaphaneity: |
Opaque |
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes |
| Habit: |
Nuggets - Irregular lumps produced by stream transport of malleable metals. |
| Hardness: |
4 - Fluorite |
| Luster: |
Metallic |
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Optical Properties of Arsenopalladinite
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| RL Anisotrophism: |
Strong, red and golden brown to blue-gray in air, khaki-brown to blue gray in oil. |
| RL Color: |
White with yellowish creamy tint. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Arsenopalladinite in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
43.90 |
44.50 |
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| 420 nm |
44.70 |
45.80 |
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| 440 nm |
45.70 |
46.50 |
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| 460 nm |
46.80 |
47.80 |
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| 480 nm |
48.10 |
49.40 |
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| 500 nm |
49.40 |
50.80 |
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| 520 nm |
50.80 |
52.40 |
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| 540 nm |
52.10 |
53.90 |
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| 560 nm |
53.20 |
55.10 |
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| 580 nm |
54.40 |
56.40 |
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| 600 nm |
55.40 |
57.30 |
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| 620 nm |
56.40 |
58.10 |
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| 640 nm |
57.00 |
58.80 |
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| 660 nm |
57.70 |
59.20 |
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| 680 nm |
58.20 |
59.80 |
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| 700 nm |
58.80 |
60.00 |
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Calculated Relative Intensity Colors of Arsenopalladinite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
180% |
190% |
| R1 |
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| R2 |
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Calculated Properties of Arsenopalladinite
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| Electron Density: |
Bulk Density (Electron Density)=9.55 gm/cc
note: Specific Gravity of Arsenopalladinite =11.0 gm/cc.
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| Fermion Index: |
Fermion Index = 0.17
Boson Index = 0.83 |
| Photoelectric: |
PEArsenopalladinite = 218.60 barns/electron
U=PEArsenopalladinite x rElectron Density=2,087.65 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Arsenopalladinite is Not Radioactive |
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Arsenopalladinite Classification
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| Dana Class: |
02.16.05.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.16)with miscellaneous formulae |
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(02.16.05)Dana Group |
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02.16.05.01 Arsenopalladinite Pd8(As,Sb)3 P1 1 |
| Strunz Class: |
02.AC.10c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf |
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02.A - Simple Sulfides, Selenides, etc |
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02.AC -Alloys of metalloids with PGE |
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02.AC.10c Arsenopalladinite Pd8(As,Sb)3 P1 1 |
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Other Arsenopalladinite Information
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(AntBidBlaNic1) |
| See Also: |
Links to other databases for Arsenopalladinite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info
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Arsenopalladinite
Pd8(As,Sb)3
Dana No: 02.16.05.01 Strunz No: 02.AC.10c
Locality:
Notes:
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