Petříčekite (original) (raw)

A valid IMA mineral species

About PetříčekiteHide

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Specific Gravity:

6.673 (Calculated)

Crystal System:

Orthorhombic

Name:

Named in honor of Václav Petříček (1948 - ), crystallographer with the Institute of Physics of the Czech Academy of Sciences, Prague, Czech Republic.

The Cu analogue of ferroselite and kullerudite. Chemically related minerals: athabascaite, bellidoite, berzelianite, klockmannite, umangite.

Associated, i.a., with some unknown selenides.

The structure is based on edge-sharing chains of CuSe6 octahedra, that are parallel to [001]. Sharing of Se2 dimers provides a link between the chains, and the Se–Se bonds are parallel to (001).

Unique IdentifiersHide

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Long-form identifier:

mindat:1:1:47038:4

2ae4bcaa-e2f1-4975-adeb-b368cb73fcf7

IMA Classification of PetříčekiteHide

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Type description reference:

Bindi, Luca, Förster, Hans-Jürgen, Grundmann, Günter, Keutsch, Frank, Stanley, Chris (2016) Petříčekite, CuSe2, a New Member of the Marcasite Group from the Předbořice Deposit, Central Bohemia Region, Czech Republic. Minerals, 6 (2) 33 doi:10.3390/min6020033

Classification of PetříčekiteHide

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2.EB.10a

2 : SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulfantimonites, sulfbismuthites, etc.)
E : Metal Sulfides, M: S <= 1:2
B : M:S = 1:2, with Fe, Co, Ni, PGE, etc.

Mineral SymbolsHide

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

Physical Properties of PetříčekiteHide

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Hardness:

VHN15=28 - 40 kg/mm2 - Vickers

Fracture:

Irregular/Uneven

Density:

6.673 g/cm3 (Calculated)

Optical Data of PetříčekiteHide

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Anisotropism:

light grey-blue to light pink rotation tints

Bireflectance:

weakly bireflectant from slightly blue-grey to slightly pinkish-grey

Reflectivity:

Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 42.85%.
R1 shown in black, R2 shown in red

Colour in reflected light:

pale blue grey to pale pinkish

Internal Reflections:

none

Chemistry of PetříčekiteHide

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Crystallography of PetříčekiteHide

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Crystal System:

Orthorhombic

Class (H-M):

m m m _(_2/_m_2/_m_2/m ) - Dipyramidal

Cell Parameters:

a = 4.918(2) Å, b = 6.001(2) Å, c = 3.670(1) Å

Ratio:

a:b:c = 0.82 : 1 : 0.612

X-Ray Powder DiffractionHide

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Powder Diffraction Data:

Geological EnvironmentHide

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Geological Setting:

El Dragón mine; possibly also in the Sierra de Cacheuta

Type Occurrence of PetříčekiteHide

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General Appearance of Type Material:

inclusions, to 150 μm, in eucairite grains

Place of Conservation of Type Material:

collections of the Harvard Mineralogical and Geological Museum, Cambridge, MA 02138, USA (reference number MGMH#2016.01)

Associated Minerals at Type Locality:

Reference:

Bindi, L., Förster, H.-J., Grundmann, G., Keutsch, F.N. and Stanley, C.J. (2016) Petříčekite, CuSe2, a new member of the marcasite group from the Předbořice deposit, Central Bohemia Region, Czech Republic. Minerals: 6(2): 33.

Synonyms of PetříčekiteHide

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Relationship of Petříčekite to other SpeciesHide

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Other Members of this group:

Common AssociatesHide

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Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

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Other InformationHide

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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 PetříčekiteHide

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References for PetříčekiteHide

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Reference List:

Bindi, Luca, Förster, Hans-Jürgen, Grundmann, Günter, Keutsch, Frank, Stanley, Chris (2016) Petříčekite, CuSe2, a New Member of the Marcasite Group from the Předbořice Deposit, Central Bohemia Region, Czech Republic. Minerals, 6 (2) 33 doi:10.3390/min6020033

Localities for PetříčekiteHide

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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

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- 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.