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Miessiite Mineral Data
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General Miessiite Information
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 Chemical Formula: |
Pd11Te2Se2 |
| Composition: |
Molecular Weight = 1,589.46 gm |
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Tellurium 16.78 % Te |
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Palladium 73.78 % Pd |
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Selenium 9.44 % Se |
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______ |
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100.00 % |
| Empirical Formula: |
Pd11.02Te2.09Se1.9 |
| Environment: |
Discovered along with placer gold and PGM nuggets. Isomertieite group. |
| IMA Status: |
Approved IMA 2006 (Dana # Added) |
| Locality: |
Miessi (in Saami language, Miessijohka) River placers, Lemmenjoki area, Inari commune, Lapland, Finland. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the locality. |
| Synonym: |
IMA2006-013 |
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Miessiite Image |
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Images:
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Miessiite
Comments: B&W optical image of miessiite grain. (CanMin, v45:1221).
Location: Miessi River placers, Lemmenjoki area, Inari commune, Lapland, Finland..
Scale: See Image.
© Canadian Mineralogist |
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Miessiite Crystallography
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| Cell Dimensions: |
a = 12.448, Z = 8; V = 1,928.85 Den(Calc)= 10.95 |
| Crystal System: |
Isometric - Diploidal H-M Symbol (2/m 3) Space Group: F d3m |
| X Ray Diffraction: |
By Intensity(I/Io): 2.197(1), 2.395(0.8), 1.271(0.3),1.305(0.25), 1.555(0.25), 1.875(0.25), 2.072(0.2), 2.543(0.2), |
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Physical Properties of Miessiite
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| Color: |
Black, Silvery gray. |
| Diaphaneity: |
Opaque |
| Fracture: |
Malleable - Deforms rather than breaking apart with a hammer. |
| Habit: |
Nuggets - Irregular lumps produced by stream transport of malleable metals. |
| Hardness: |
2-2.5 - Gypsum-Finger Nail |
| Luster: |
Metallic |
| Streak: |
black |
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Optical Properties of Miessiite
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| RL Anisotrophism: |
None. |
| RL Bireflectance: |
None. |
| RL Color: |
Light gray in air, pinkish gray in oil. |
| RL Pleochroism: |
None. |
| Reflectivity |
Standardized Intensity (100%) Reflection Spectra of Miessiite in Air
| λ |
R |
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∑ R(λ) |
| 400 nm |
44.30 |
 |
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| 420 nm |
45.65 |
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| 440 nm |
47.60 |
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| 460 nm |
48.65 |
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| 470 nm |
48.90 |
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| 480 nm |
49.10 |
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| 500 nm |
49.60 |
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| 520 nm |
50.30 |
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| 540 nm |
51.40 |
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| 546 nm |
51.60 |
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| 560 nm |
52.20 |
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| 580 nm |
53.30 |
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| 589 nm |
53.90 |
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| 600 nm |
54.60 |
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| 620 nm |
55.70 |
 |
| 640 nm |
56.50 |
 |
| 650 nm |
56.80 |
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| 660 nm |
57.10 |
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| 680 nm |
57.55 |
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| 700 nm |
58.30 |
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Standardized Intensity (100%) Reflection Spectra of Miessiite in Oil
| λ |
R |
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∑ R(λ) |
| 400 nm |
22.60 |
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| 420 nm |
23.60 |
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| 440 nm |
26.50 |
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| 460 nm |
28.70 |
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| 470 nm |
29.50 |
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| 480 nm |
30.20 |
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| 500 nm |
30.80 |
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| 520 nm |
30.50 |
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| 540 nm |
31.20 |
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| 546 nm |
31.60 |
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| 560 nm |
32.45 |
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| 580 nm |
33.20 |
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| 589 nm |
33.70 |
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| 600 nm |
34.35 |
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| 620 nm |
35.10 |
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| 640 nm |
36.10 |
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| 650 nm |
36.65 |
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| 660 nm |
37.20 |
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| 680 nm |
37.80 |
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| 700 nm |
38.40 |
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Calculated Relative Intensity Colors of Miessiite in Air
Relative
Intensity |
0% |
20% |
40% |
60% |
80% |
100% |
120% |
140% |
160% |
180% |
190% |
| R |
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Calculated Relative Intensity Colors of Miessiite in Oil
Relative
Intensity |
0% |
40% |
80% |
100% |
120% |
160% |
200% |
240% |
280% |
320% |
| R |
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Calculated Properties of Miessiite
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| Electron Density: |
Bulk Density (Electron Density)=9.37 gm/cc
note: Specific Gravity of Miessiite =11.0 gm/cc.
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| Fermion Index: |
Fermion Index = 0.18
Boson Index = 0.82 |
| Photoelectric: |
PEMiessiite = 248.24 barns/electron
U=PEMiessiite x rElectron Density=2,326.52 barns/cc.
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Miessiite is Not Radioactive |
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Miessiite Classification
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| Dana Class: |
02.16.02.02 (02)Sulfides - Including Selenides and Tellurides |
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(02.16)with miscellaneous formulae |
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(02.16.02)Dana Group |
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02.16.02.01 Isomertieite Pd11Sb2As2 F d3m 4/m 3 2/m |
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02.16.02.02 Miessiite! Pd11Te2Se2 F d3m 2/m 3 |
| Strunz Class: |
02.AC.15a 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.15a Isomertieite Pd11Sb2As2 F d3m 4/m 3 2/m |
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02.AC.15a Miessiite! Pd11Te2Se2 F d3m 2/m 3 |
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Other Miessiite Information
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| References: |
NAME( CanMin, v45:1221) PHYS. PROP.(CanMin, v45:1221) OPTIC PROP.(CanMin, v45:1221) |
| See Also: |
Links to other databases for Miessiite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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Miessiite
Pd11Te2Se2
Dana No: 02.16.02.02 Strunz No: 02.AC.15a
Locality:
Notes:
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