Miessiite
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Formula:
Pd11Te2Se2
Colour:
black
Lustre:
Metallic
Hardness:
2 - 2½
Specific Gravity:
10.94 (Calculated)
Crystal System:
Isometric
Member of:
Name:
The mineral is named after the locality, the Miessi river (in Saami language, Miessijohka where johka means river and Miessi means a reindeer calf).
Type Locality:
This page provides mineralogical data about Miessiite.
Classification of Miessiite
Approved
Approval Year:
2006
2.AC.15
2.AC.15a
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
C : Alloys of metalloids with PGE
2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
A : Alloys
C : Alloys of metalloids with PGE
2.16.2.2
2 : SULFIDES
16 : Miscellaneous
2 : SULFIDES
16 : Miscellaneous
Physical Properties of Miessiite
Metallic
Transparency:
Opaque
Colour:
black
Hardness:
2 - 2½ on Mohs scale
Hardness:
VHN100=362 kg/mm2 - Vickers
Tenacity:
Malleable
Density:
10.94 g/cm3 (Calculated)
Optical Data of Miessiite
Type:
Isotropic
Colour in reflected light:
light grey color in air; pinkish grey color in oil
Chemical Properties of Miessiite
Formula:
Pd11Te2Se2
Elements listed:
Crystallography of Miessiite
Crystal System:
Isometric
Class (H-M):
m3m (4/m 3 2/m) - Hexoctahedral
Space Group:
Fd3m
Setting:
Fd3m
Cell Parameters:
a = 12.448(2) Å
Unit Cell V:
1,928.85 ų (Calculated from Unit Cell)
Z:
8
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 2.543 | (20) |
| 2.395 | (80) |
| 2.197 | (100) |
| 2.072 | (20) |
| 1.875 | (25) |
| 1.555 | (25) |
| 1.305 | (25) |
| 1.271 | (30) |
Type Occurrence of Miessiite
General Appearance of Type Material:
subidiomorphic cubic morphology
Place of Conservation of Type Material:
Finnish Museum of Natural History, Geological Museum, University of Helsinki, Helsinki, Finland, under collection sample number D3004.
Geological Setting of Type Material:
Gold and PGM placer of glaciofluvial river gravels, sands, terraces, poorly sorted sandy till and weathered bedrock
Associated Minerals at Type Locality:
Synonyms of Miessiite
Relationship of Miessiite to other Species
Related Minerals - Nickel-Strunz Grouping
| 2.AC.05a | Atheneite | Pd2As0.75Hg0.25 | Hex. 6 m2 : P62m |
| 2.AC.05b | Vincentite | Pd3As | Tet. |
| 2.AC.10c | Arsenopalladinite | Pd8(As,Sb)3 | Tric. 1 : P1 |
| 2.AC.10b | Mertieite-II | Pd8Sb2.5As0.5 | Trig. 3m (3 2/m) : R3c |
| 2.AC.10a | Stillwaterite | Pd8As3 | Trig. |
| 2.AC.15a | Isomertieite | Pd11Sb2As2 | Iso. m3m (4/m 3 2/m) : Fd3m |
| 2.AC.15b | Mertieite-I | Pd11(Sb,As)4 | Hex. |
| 2.AC.20b | Palarstanide | Pd5(Sn,As)2 | Hex. |
| 2.AC.20a | Stibiopalladinite | Pd5Sb2 | Hex. |
| 2.AC.20c | Menshikovite | Pd3Ni2As3 | Hex. 6/m : P63/m |
| 2.AC.25e | Majakite | PdNiAs | Hex. |
| 2.AC.25a | Palladoarsenide | Pd2As | Mon. 2/m : P2/m |
| 2.AC.25f | Palladobismutharsenide | Pd2(As,Bi) | Orth. |
| 2.AC.25c | Palladodymite | (Pd,Rh)2As | Orth. |
| 2.AC.25b | Rhodarsenide | (Rh,Pd)2As | Orth. |
| 2.AC.25d | Naldrettite | Pd2Sb | Orth. mm2 : Cmc21 |
| 2.AC.30 | UM1999-02-As:NiRh | (Rh,Ni)7As4 | |
| 2.AC.30 | Polkanovite | Rh12As7 | Hex. |
| 2.AC.35a | Genkinite | (Pt,Pd,Rh)4Sb3 | Tet. 4 2 2 |
| 2.AC.35b | Ungavaite | Pd4Sb3 | Tet. 4 2 2 : P41 21 2 |
| 2.AC.40 | Polarite | Pd(Bi,Pb) | Orth. mm2 : Cmc21 |
| 2.AC.45c | Borishanskiite | Pd1+x(As,Pb)2 , x = 0-0.2 | Orth. mm2 |
| 2.AC.45a | Froodite | α-PdBi2 | Mon. 2/m : B2/m |
| 2.AC.45b | Iridarsenite | (Ir,Ru)As2 | Mon. |
Related Minerals - Dana Grouping (8th Ed.)
| 2.16.2.1 | Isomertieite | Pd11Sb2As2 | Iso. m3m (4/m 3 2/m) : Fd3m |
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.
References for Miessiite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kojonen, K. K., Tarkian, M., Roberts, A. C., Törnroos, R., & Heidrich, S. (2007). Miessiite, Pd11Te2Se2, a new mineral species from Miessijoki, Finnish Lapland, Finland. The Canadian Mineralogist, 45(5), 1221-1227.
Internet Links for Miessiite
mindat.org URL:
https://www.mindat.org/min-29258.html
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Localities for Miessiite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for 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.
Finland (TL) | |
| Kojonen, K.K., Tarkian, M., Roberts, A.C., Törnroos, R., Heidrich, S. (2007): Miessiite, Pd11Te2Se2, a new mineral species from Miessijoki, Finnish Lapland, Finland. Canadian Mineralogist, 45, (in press); 33rd International Geological Congress (2008) session MPM-04 Platinum-group mineralogy: Pt-Pd selenides from river placers, northern Finland; Kojonen, K. K., Tarkian, M., Roberts, A. C., Törnroos, R., & Heidrich, S. (2007). Miessiite, Pd11Te2Se2, a new mineral species from Miessijoki, Finnish Lapland, Finland. The Canadian Mineralogist, 45(5), 1221-1227.; Kari Kojonen (2012) PGE ore potential in the southwestern granulite belt of Northern Finland. Geological Survey of Finland, Report of Investigation 207 pp 64-67 |