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Palladoarsenide Mineral Data
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General Palladoarsenide Information
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 Chemical Formula: |
Pd2As |
| Composition: |
Molecular Weight = 287.76 gm |
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Arsenic 26.04 % As |
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Palladium 73.96 % Pd |
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______ |
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100.00 % |
| Empirical Formula: |
Pd2As |
| Environment: |
Minute grains in chalcopyrite that occurs in viens along the footwall of a Cu-Ni deposit. |
| IMA Status: |
Approved IMA 1974 |
| Locality: |
Oktyabr mine, Talnakh area, Noril'sk district, western Siberia, Russia. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the composition. |
| Name Pronunciation: |
Palladoarsenide  |
| Synonym: |
ICSD 26279 |
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PDF 17-227 |
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Palladoarsenide Image |
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Images:
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Palladoarsenide
Comments: SEM polished section showing hessite (Hes) with merenskyite (Mrk) relics surrounded by palladoarsenide (PdAs). (CanMin, v43:1355).
Location: Elatsite porphyry-copper deposit, Bulgaria.
Scale: Scale Bar 10 µm.
© Canadian Mineralogist |
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Palladoarsenide Crystallography
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| Axial Ratios: |
a:b:c =1.092:1:1.2325 |
| Cell Dimensions: |
a = 9.25, b = 8.47, c = 10.44, Z = 18; beta = 94° V = 815.96 Den(Calc)= 10.54 |
| Crystal System: |
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 2/m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.14(1), 2.21(0.9), 2.6(0.7), |
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Physical Properties of Palladoarsenide
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| Cleavage: |
{???} Good, {???} Good |
| Color: |
Steel gray. |
| Density: |
10.42 |
| Diaphaneity: |
Opaque |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Inclusions - Generally found as inclusions in other minerals. |
| Habit: |
Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks. |
| Hardness: |
5 - Apatite |
| Luster: |
Metallic |
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Optical Properties of Palladoarsenide
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| RL Anisotrophism: |
Moderate, dark gray wiht bluish tint to red-brown in air, dark gray to brownish gray in oil. |
| RL Color: |
Grayish white with a slight rose tint. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Palladoarsenide in Air
| λ |
R1 |
R2 |
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∑ R1(λ) |
∑ R2(λ) |
| 400 nm |
44.20 |
45.10 |
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| 420 nm |
46.80 |
46.80 |
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| 440 nm |
48.40 |
48.80 |
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| 460 nm |
49.40 |
50.30 |
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| 480 nm |
50.20 |
51.60 |
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| 500 nm |
51.20 |
53.10 |
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| 520 nm |
51.90 |
54.10 |
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| 540 nm |
52.50 |
54.80 |
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| 560 nm |
53.30 |
55.40 |
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| 580 nm |
53.90 |
55.80 |
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| 600 nm |
54.60 |
56.30 |
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| 620 nm |
55.40 |
57.10 |
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| 640 nm |
56.00 |
57.60 |
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| 660 nm |
56.60 |
58.10 |
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| 680 nm |
57.10 |
58.60 |
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| 700 nm |
57.80 |
59.20 |
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Calculated Relative Intensity Colors of Palladoarsenide 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 Palladoarsenide
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| Electron Density: |
Bulk Density (Electron Density)=9.16 gm/cc
note: Specific Gravity of Palladoarsenide =10.5 gm/cc.
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| Fermion Index: |
Fermion Index = 0.16
Boson Index = 0.84 |
| Photoelectric: |
PEPalladoarsenide = 197.46 barns/electron
U=PEPalladoarsenide x rElectron Density=1,808.14 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Palladoarsenide is Not Radioactive |
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Palladoarsenide Classification
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| Dana Class: |
02.04.14.01 (02)Sulfides - Including Selenides and Tellurides |
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(02.04)where Am Bn Xp, with (m+n):p=2:1 |
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(02.04.14)Dana Group |
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02.04.14.01 Palladoarsenide Pd2As P 2/m 2/m |
| Strunz Class: |
02.AC.25a 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.25a Palladoarsenide Pd2As P 2/m 2/m |
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Other Palladoarsenide 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 Palladoarsenide :
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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Palladoarsenide
Pd2As
Dana No: 02.04.14.01 Strunz No: 02.AC.25a
Locality:
Notes:
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