Miessiite Mineral Data

General Miessiite Information

Chemical Formula:

Pd11Te2Se2

Composition:

Molecular Weight = 1,589.46 gm

Tellurium 16.78 % Te

Palladium 73.78 % Pd

Selenium 9.44 % Se

______

100.00 %

Empirical Formula:

Pd_11.02Te_2.09Se_1.9

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

Miessiite Image

Images:

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

Miessiite Crystallography

Cell Dimensions:

a = 12.448, Z = 8; V = 1,928.85 Den(Calc)= 10.95

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: F d3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 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),

Physical Properties of Miessiite

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

Optical Properties of Miessiite

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	∑ R(λ)
400 nm	44.30
420 nm	45.65
440 nm	47.60
460 nm	48.65
470 nm	48.90
480 nm	49.10
500 nm	49.60
520 nm	50.30
540 nm	51.40
546 nm	51.60
560 nm	52.20
580 nm	53.30
589 nm	53.90
600 nm	54.60
620 nm	55.70
640 nm	56.50
650 nm	56.80
660 nm	57.10
680 nm	57.55
700 nm	58.30

**Standardized Intensity (100%) Reflection Spectra of Miessiite in Oil**
λ	R	∑ R(λ)
400 nm	22.60
420 nm	23.60
440 nm	26.50
460 nm	28.70
470 nm	29.50
480 nm	30.20
500 nm	30.80
520 nm	30.50
540 nm	31.20
546 nm	31.60
560 nm	32.45
580 nm	33.20
589 nm	33.70
600 nm	34.35
620 nm	35.10
640 nm	36.10
650 nm	36.65
660 nm	37.20
680 nm	37.80
700 nm	38.40

**Calculated Relative Intensity Colors of Miessiite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R

**Calculated Relative Intensity Colors of Miessiite in Oil**
Relative Intensity	0%	40%	80%	100%	120%	160%	200%	240%	280%	320%
R

Calculated Properties of Miessiite

Electron Density:

Bulk Density (Electron Density)=9.37 gm/cc
note: Specific Gravity of Miessiite =11.0 gm/cc.

Fermion Index:

Fermion Index = 0.18
Boson Index = 0.82

Photoelectric:

PE_Miessiite= 248.24 barns/electron
U=PE_Miessiite x rElectron Density=2,326.52 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Miessiite is Not Radioactive

Miessiite Classification

Dana Class:

02.16.02.02 (02)Sulfides - Including Selenides and Tellurides

(02.16)with miscellaneous formulae

(02.16.02)Dana Group

02.16.02.01 Isomertieite Pd11Sb2As2 F d3m 4/m 3 2/m

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

02.A - Simple Sulfides, Selenides, etc

02.AC -Alloys of metalloids with PGE

02.AC.15a Isomertieite Pd11Sb2As2 F d3m 4/m 3 2/m

02.AC.15a Miessiite! Pd11Te2Se2 F d3m 2/m 3

Other Miessiite Information

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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Ask about Miessiite here :
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Print or Cut-and-Paste your Miessiite Specimen Label here :

Miessiite

Pd11Te2Se2
Dana No: 02.16.02.02 Strunz No: 02.AC.15a
Locality:

Notes: