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Miessiite

A valid IMA mineral species

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Formula:

Pd₁₁Te₂Se₂

Colour:

black

Lustre:

Metallic

Hardness:

2 - 2½

Specific Gravity:

10.94 (Calculated)

Crystal System:

Isometric

Member of:

Isomertieite Group

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:

ⓘ Miessijoki River, Enontekiö, Lapland, Finland

This page provides mineralogical data about Miessiite.

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Unique IdentifiersHide

Mindat ID:

29258

Long-form identifier:

mindat:1:1:29258:2

GUID
(UUID V4):

e759a6fe-7114-4c80-9750-42ee6af3551c

IMA Classification of MiessiiteHide

IMA status:

Approved

Approval year:

2006

First published:

2007

Type description reference:

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 doi:10.2113/gscanmin.45.5.1221

Classification of MiessiiteHide

Strunz-mindat (2024):

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

Dana 8th ed.:

2.16.2.2

2 : SULFIDES
16 : Miscellaneous

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

Symbol	Source	Reference
Mie	IMA–CNMNC	Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
Mie	The Canadian Mineralogist (2019)	The Canadian Mineralogist (2019) The Canadian Mineralogist list of symbols for rock- and ore-forming minerals (December 30, 2019). download

Physical Properties of MiessiiteHide

Lustre:

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 MiessiiteHide

Reflectivity:

Wavelength	R₁	R₂
400nm	44.3%	22.6%
420nm	45.56%	23.6%
440nm	47.6%	26.5%
460nm	48.65%	28.7%
470nm	48.9%	29.5%
480nm	49.1%	30.2%
500nm	49.6%	30.8%
520nm	50.3%	30.5%
540nm	51.4%	31.2%
546nm	51.6%	31.6%
560nm	52.2%	32.45%
580nm	53.3%	33.2%
589nm	53.9%	33.7%
600nm	54.6%	34.35%
620nm	55.7%	35.1%
640nm	56.5%	36.1%
650nm	56.8%	36.65%
660nm	57.1%	37.2%
680nm	57.55%	37.8%
700nm	58.3%	38.4%

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 58.3%.
R₁ shown in black, R₂ shown in red

Colour in reflected light:

Light grey color in air; pinkish grey color in oil

Chemistry of MiessiiteHide

Mindat Formula:

Pd₁₁Te₂Se₂

Elements listed:

Pd, Se, Te - search for minerals with similar chemistry

Crystallography of MiessiiteHide

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 Å³ (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Powder Diffraction Data:

d-spacing	Intensity
2.543 Å	(20)
2.395 Å	(80)
2.197 Å	(100)
2.072 Å	(20)
1.875 Å	(25)
1.555 Å	(25)
1.305 Å	(25)
1.271 Å	(30)

Geological EnvironmentHide

Paragenetic Mode(s):

Paragenetic Mode	Earliest Age (Ga)
Near-surface Processes
26 : Hadean detrital minerals
High-𝑇 alteration and/or metamorphism
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12])
Stage 4b: Highly evolved igneous rocks	>3.0
37 : Layered igneous intrusions and related PGE minerals

Type Occurrence of MiessiiteHide

Type Locality:

ⓘ Miessijoki River, Enontekiö, Lapland, Finland

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:

Vincentite	Thorianite	Tantalite	Stillwaterite	Pyrite
Mertieite	Magnetite	Laurite	Kotulskite	Isomertieite
Isoferroplatinum	Cooperite	Chromite	Braggite

Reference:

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.

Download:

https://rruff.info/rruff_1.0/uploads/CM45_1221.pdf

Synonyms of MiessiiteHide

IMA2006-013

Relationship of Miessiite to other SpeciesHide

Member of:

Isomertieite Group

Other Members of this group:

Isomertieite

Pd₁₁Sb₂As₂

Iso. m3m (4/m 3 2/m) : Fd3m

Related Minerals - Strunz-mindat Grouping Hide

2.AC.	Törnroosite	Pd₁₁As₂Te₂	Iso. m3m (4/m 3 2/m) : Fd3m
2.AC.	Vadlazarenkovite	Pd₈Bi_1.5Te_1.25As_0.25	Trig. 3m (3 2/m) : R3c
2.AC.05a	Atheneite	Pd₂As_0.75Hg_0.25	Hex. 6 m2 : P6₂m
2.AC.05b	Vincentite	Pd₃As	Mon.
2.AC.10c	Arsenopalladinite	Pd₈(As,Sb)₃	Tric. 1 : P1
2.AC.10b	Mertieite	Pd₈Sb_2.5As_0.5	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	Pseudomertieite	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. mmm (2/m 2/m 2/m) : Pnma
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. 6/m : P6₃/m
2.AC.35a	Genkinite	Pt₄Sb₃	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.45a	Froodite	α-PdBi₂	Mon. 2/m : B2/m
2.AC.50	Nipalarsite	Ni₈Pd₃As₄	Iso. m3m (4/m 3 2/m)
2.AC.50	Viteite	Pd₅InAs	Tet. 4/mmm (4/m 2/m 2/m) : P4/mmm

Other InformationHide

Health Risks:

No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

Internet Links for MiessiiteHide

mindat.org URL:

https://www.mindat.org/min-29258.html
Please feel free to link to this page.

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Raman and XRD data at RRUFF project

References and PDF downloads at RRUFF project

American Mineralogist Crystal Structure Database

Handbook of Mineralogy page PDF

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References for MiessiiteHide

Reference List:

(2023) Miessiite. Handbook of Mineralogy. Mineralogical Society of America

Localities for MiessiiteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the

symbol to view information about a locality. The

symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed.

- This locality has estimated coordinates. ⓘ - Click for references and 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). ~~Struck out~~ - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.

Finland (TL)

Lapland

Enontekiö

ⓘ Miessijoki River (TL)

Kojonen et al. (2007) +3 other references

Miessiite

Unique IdentifiersHide

IMA Classification of MiessiiteHide

Classification of MiessiiteHide

Mineral SymbolsHide

Physical Properties of MiessiiteHide

Optical Data of MiessiiteHide

Chemistry of MiessiiteHide

Crystallography of MiessiiteHide

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Type Occurrence of MiessiiteHide

Synonyms of MiessiiteHide

Relationship of Miessiite to other SpeciesHide

Related Minerals - Strunz-mindat GroupingHide

Other InformationHide

Internet Links for MiessiiteHide

References for MiessiiteHide

Localities for MiessiiteHide

Locality ListHide

Related Minerals - Strunz-mindat Grouping Hide