Ferroselite
A valid IMA mineral species - grandfathered
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About Ferroselite
Formula:
FeSe2
Colour:
Steel gray to tin white with rose tint, brass yellow
Lustre:
Metallic
Hardness:
6 - 6½
Specific Gravity:
7.20
Crystal System:
Orthorhombic
Member of:
Name:
For the chemical composition.
Type Locality:
Dimorph of:
Unique Identifiers
Mindat ID:
1527
Long-form identifier:
mindat:1:1:1527:7
GUID
(UUID V4):
(UUID V4):
a799fcd3-a6b7-4a35-83b3-1a6eb8d3098f
IMA Classification of Ferroselite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1955
Type description reference:
Classification of Ferroselite
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.
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.
2.12.2.2
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
2 : SULFIDES
12 : AmBnXp, with (m+n):p = 1:2
3.9.9
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
9 : Sulphides etc. of Fe
3 : Sulphides, Selenides, Tellurides, Arsenides and Bismuthides (except the arsenides, antimonides and bismuthides of Cu, Ag and Au, which are included in Section 1)
9 : Sulphides etc. of Fe
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Fse | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Ferroselite
Metallic
Transparency:
Opaque
Colour:
Steel gray to tin white with rose tint, brass yellow
Comment:
Tarnishes to brassy tone
Streak:
Black
Hardness:
6 - 6½ on Mohs scale
Hardness:
VHN25=858 - 933 kg/mm2 - Vickers
Tenacity:
Very brittle
Density:
7.20 g/cm3 (Measured) 7.139 g/cm3 (Calculated)
Optical Data of Ferroselite
Anisotropism:
Strong, from greenish gray to lilac gray
Reflectivity:
Wavelength | R1 | R2 |
---|---|---|
400nm | 42.3% | 44.1% |
420nm | 42.5% | 44.3% |
440nm | 43.0% | 44.5% |
460nm | 43.5% | 45.1% |
480nm | 43.9% | 45.9% |
500nm | 44.4% | 47.0% |
520nm | 44.9% | 48.2% |
540nm | 45.3% | 49.5% |
560nm | 46.0% | 50.9% |
580nm | 46.8% | 52.3% |
600nm | 47.6% | 53.7% |
620nm | 48.2% | 54.9% |
640nm | 48.7% | 55.9% |
660nm | 49.1% | 56.3% |
680nm | 49.3% | 56.5% |
700nm | 49.5% | 56.7% |
Graph shows reflectance levels at different wavelengths (in nm). Top of box is 100%. Peak reflectance is 56.7%.
R1 shown in black, R2 shown in red
Colour in reflected light:
White with gray-brown hue
Pleochroism:
Visible
Chemistry of Ferroselite
Mindat Formula:
FeSe2
Elements listed:
Common Impurities:
Co
Crystallography of Ferroselite
Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Pnnm
Setting:
Pnnm
Cell Parameters:
a = 4.8007 Å, b = 5.776 Å, c = 3.5850 Å
Ratio:
a:b:c = 0.831 : 1 : 0.621
Unit Cell V:
99.41 Ă
Âł (Calculated from Unit Cell)
Z:
2
Morphology:
Slender prismatic crystals
Twinning:
Stellate and cruciform twins, twin lammellae in polished sections.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0011936 | Ferroselite | Kjekshus A, Rakke T, Andresen A (1974) Compounds of the marcasite type crystal structure. IX. Structural data for FeAs2, FeSe2, NiAs2, NiSb2, and CuSe2 Acta Chemica Scandinavica A28 996-1000 | 1974 | synthetic | 0 | 293 | |
0020709 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 0 | 293 | |
0020710 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 1.7 | 293 | |
0020711 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 3.83 | 293 | |
0020712 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 8.1 | 293 | |
0020713 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 17.3 | 293 | |
0020714 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 24.4 | 293 | |
0020715 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 32 | 293 | |
0020716 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 46 | 293 | |
0020717 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 0.0001 | 198.2 | |
0020718 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 0.0001 | 148.4 | |
0020719 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 0.0001 | 50.4 | |
0020720 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 3.68 | 197 | |
0020721 | Ferroselite | Lavina B, Downs R T, Sinogeikin S (2018) The structure of ferroselite, FeSe2, at pressures up to 46 GPa and temperatures down to 50 K: A single-crystal micro-diffraction analysis Crystals 8 289; doi:10.3390/cryst807 | 2018 | Paradox Valley, Uravan District, Montrose County, Colorado, USA | 3.64 | 116 | |
0013331 | Ferroselite | Pickardt J, Reuter B, Riedel E, Sochtig J (1975) On the formation of FeSe2 single crystals by chemical transport reactions Journal of Solid State Chemistry 15 366-368 | 1975 | synthetic | 0 | 293 | |
0015754 | Ferroselite | Tengner S (1938) Uber diselenide und ditelluride von eisen, kobalt und nickel Zeitschrift fur Anorganische und Allgemeine Chemie 239 126-132 | 1938 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.568 Ă | (100) |
2.474 Ă | (100) |
1.885 Ă | (70) |
2.871 Ă | (50) |
1.695 Ă | (40) |
2.400 Ă | (35) |
1.541 Ă | (35) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
High-đ alteration and/or metamorphism | |
33 : Minerals deposited by hydrothermal metal-rich fluids (see also [#12]) | |
Stage 10a: Neoproterozoic oxygenation/terrestrial biosphere | <0.6 |
53 : Other minerals with taphonomic origins | <0.4 |
Geological Setting:
Red bed deposits of Colorado Plateau type.
Type Occurrence of Ferroselite
General Appearance of Type Material:
Prismatic crystals of the mineral are 0.2-0.5 mm long and up to 0.1 mm in cross-section.
Place of Conservation of Type Material:
Mining Museum, St. Petersburg Mining Institute, St. Petersburg, Russia, 46-2/1.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 69853.
A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 69853.
Geological Setting of Type Material:
Cementing sandstones and pelites in Middle Devonian deposits.
Associated Minerals at Type Locality:
Reference:
Buryanova, E.Z., Komkov, A.I. (1955) A new mineral - ferroselite. Doklady Akademii Nauk SSSR: 105: 812-813.
Synonyms of Ferroselite
Other Language Names for Ferroselite
German:Ferroselit
Russian:ЀДŃŃĐŸŃДлОŃ
Simplified Chinese:çœçĄéçż
ææčçĄéçż
ææčéçĄçż
ææčçĄéçż
ææčéçĄçż
Spanish:Ferroselita
Traditional Chinese:çœçĄé”瀊
ææčçĄé”瀊
ææčé”çĄç€Š
ææčçĄé”瀊
ææčé”çĄç€Š
Relationship of Ferroselite to other Species
Member of:
Other Members of this group:
Frohbergite | FeTe2 | Orth. mmm (2/m 2/m 2/m) : Pnnm |
Kullerudite | NiSe2 | Orth. mmm (2/m 2/m 2/m) : Pnnm |
Marcasite | FeS2 | Orth. mmm (2/m 2/m 2/m) : Pnnm |
Mattagamite | CoTe2 | Orth. mmm (2/m 2/m 2/m) : Pnnm |
PetĆĂÄekite | CuSe2 | Orth. mmm (2/m 2/m 2/m) : Pnnm |
Common Associates
Associated Minerals Based on Photo Data:
3 photos of Ferroselite associated with Cobaltomenite | CoSeO3 · 2H2O |
3 photos of Ferroselite associated with Sandstone | |
2 photos of Ferroselite associated with Calcite | CaCO3 |
2 photos of Ferroselite associated with Leucoxene | |
2 photos of Ferroselite associated with Selenium | Se |
1 photo of Ferroselite associated with Haynesite | (UO2)3(OH)2(SeO3)2 · 5H2O |
1 photo of Ferroselite associated with Boltwoodite | (K,Na)(UO2)(SiO3OH) · 1.5H2O |
1 photo of Ferroselite associated with K Feldspar | |
1 photo of Ferroselite associated with Clausthalite | PbSe |
1 photo of Ferroselite associated with Berzelianite | Cu2-xSe (x â 0.12) |
Related Minerals - Strunz-mindat Grouping
2.EB. | Iridarsenite | (Ir,Ru)As2 |
2.EB. | Selenolaurite | RuSe2 |
2.EB. | Andrieslombaardite | RhSbS |
2.EB. | Kanatzidisite | (SbBiS3)2Te2 |
2.EB.05a | Aurostibite | AuSb2 |
2.EB.05b | Bambollaite | Cu(Se,Te)2 |
2.EB.05a | Cattierite | CoS2 |
2.EB.05a | Erlichmanite | OsS2 |
2.EB.05a | Fukuchilite | Cu3FeS8 |
2.EB.05a | Geversite | PtSb2 |
2.EB.05a | Hauerite | MnS2 |
2.EB.05a | Insizwaite | Pt(Bi,Sb)2 |
2.EB.05a | Krut'aite | CuSe2 |
2.EB.05a | Laurite | RuS2 |
2.EB.05a | Penroseite | (Ni,Co,Cu)Se2 |
2.EB.05a | Pyrite | FeS2 |
2.EB.05a | Sperrylite | PtAs2 |
2.EB.05a | Trogtalite | CoSe2 |
2.EB.05a | Vaesite | NiS2 |
2.EB.05a | VillamanĂnite | (Cu,Ni,Co,Fe)S2 |
2.EB.05a | Dzharkenite | FeSe2 |
2.EB.05a | Gaotaiite | Ir3Te8 |
2.EB.05a v | Cayeuxite | |
2.EB.10b | Alloclasite | Co1-xFexAsS |
2.EB.10d | Costibite | CoSbS |
2.EB.10a | Frohbergite | FeTe2 |
2.EB.10c | Glaucodot | (Co0.50Fe0.50)AsS |
2.EB.10a | Kullerudite | NiSe2 |
2.EB.10a | Marcasite | FeS2 |
2.EB.10a | Mattagamite | CoTe2 |
2.EB.10e | Paracostibite | CoSbS |
2.EB.10e | Pararammelsbergite | NiAs2 |
2.EB.10f | Oenite | CoSbAs |
2.EB.10a | PetĆĂÄekite | CuSe2 |
2.EB.15a | Anduoite | (Ru,Os)As2 |
2.EB.15a | Clinosafflorite | CoAs2 |
2.EB.15a | Löllingite | FeAs2 |
2.EB.15a | Nisbite | NiSb2 |
2.EB.15a | Omeiite | (Os,Ru)As2 |
2.EB.15c | Paxite | CuAs2 |
2.EB.15a | Rammelsbergite | NiAs2 |
2.EB.15a | Safflorite | (Co,Ni,Fe)As2 |
2.EB.15b | SeinÀjokite | (Fe,Ni)(Sb,As)2 |
2.EB.20 | Arsenopyrite | FeAsS |
2.EB.20 | Gudmundite | FeSbS |
2.EB.20 | Osarsite | (Os,Ru)AsS |
2.EB.20 | Ruarsite | (Ru,Os)AsS |
2.EB.25 va | Antimony-bearing Gersdorffite | Ni(As,Sb)S |
2.EB.25 | Cobaltite | CoAsS |
2.EB.25 | Gersdorffite | NiAsS |
2.EB.25 | Hollingworthite | (Rh,Pt,Pd)AsS |
2.EB.25 | Irarsite | (Ir,Ru,Rh,Pt)AsS |
2.EB.25 | Jolliffeite | NiAsSe |
2.EB.25 | Krutovite | NiAs2 |
2.EB.25 | Maslovite | PtBiTe |
2.EB.25 | Michenerite | PdBiTe |
2.EB.25 | Padmaite | PdBiSe |
2.EB.25 | Platarsite | Pt(As,S)2 |
2.EB.25 | Testibiopalladite | PdSbTe |
2.EB.25 | Tolovkite | IrSbS |
2.EB.25 | Ullmannite | NiSbS |
2.EB.25 | Willyamite | CoSbS |
2.EB.25 | Changchengite | IrBiS |
2.EB.25 | Mayingite | IrBiTe |
2.EB.25 | Kalungaite | PdAsSe |
2.EB.25 | Milotaite | PdSbSe |
2.EB.25 | Paragersdorffite | Ni(As,S)2 |
2.EB.25 | Orthogersdorffite | NiAsS |
2.EB.30 | Urvantsevite | Pd(Bi,Pb)2 |
2.EB.35 | Rheniite | ReS2 |
Other Information
Thermal Behaviour:
Heated in a closed tube, it gives a dark-red sublimate and the characteristic selenium odor.
Notes:
On heating becomes magnetic.
Dissolved by HNO3, only slightly by HCl and H2SO4.
Dissolved by HNO3, only slightly by HCl and H2SO4.
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 Ferroselite
mindat.org URL:
https://www.mindat.org/min-1527.html
Please feel free to link to this page.
Please feel free to link to this page.
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References for Ferroselite
Reference List:
Localities for Ferroselite
Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
All localities listed without proper references should be considered as questionable.
Argentina | |
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Paar, Werner H., Topa, Dan, Roberts, Andrew C., Criddle, Alan J., Amann, Gerhard, Sureda, Ricardo J. (2002) The new mineral species brodtkorbite, Cu2HgSe2, and the associated selenide assemblage from Tuminico, Sierra de Cacho, La Rioja, Argentina. The Canadian Mineralogist, 40 (1) 225-237 doi:10.2113/gscanmin.40.1.225 | |
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| Dill, H.G., Weber, B. (2010) Accessory minerals of fluorite and their implication regarding the environment of formation (NabburgâWölsendorf fluorite district, SE Germany), with special reference to fetid fluorite (âStinkspatâ). Ore Geology Reviews, 37 (2). 65-86 doi:10.1016/j.oregeorev.2010.01.004 |
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PĆedboĆice deposit, PĆedboĆice, KovĂĄĆov, PĂsek District, South Bohemian Region, Czech Republic