| dbo:abstract |
Eisensilicid ist eine von mehreren anorganischen chemischen Verbindungen zwischen Eisen und Silizium. (de) Iron monosilicide (FeSi) is an intermetallic compound, a silicide of iron that occurs in nature as the rare mineral naquite. It is a narrow-bandgap semiconductor with a room-temperature electrical resistivity of ca. 10,000 Ohm·cm and unusual magnetic properties at low temperatures. FeSi has a cubic crystal lattice with no inversion center; therefore its magnetic structure is helical, with right-hand and left-handed chiralities. The structure is similar to that of sodium chloride, with four iron atoms and four silicon atoms in each unit cell. Whereas in sodium chloride the eight atoms are at the corners of a cube and each ion is surrounded by six counter-ions, in iron monosilicide the atoms are all displaced parallele to body diagonals (along 3-fold axes) from the positions of sodium and chloride. The crystal therefore loses symmetry, but retains the 2-fold screw axes and the 3-fold axes of the sodium chloride crystal structure. As a result of this displacement, an iron atom is about as close to a silicon atom on the same 3-fold axis as to any of the other six silicon atoms around it (instead of being time further away as in sodium chloride). This means that each iron atoms has seven nearby silicon atoms, and conversely each silicon atom sits in a similar (enantiomorphic) cage of iron atoms. The cages only have 3-fold rotational symmetry, with three slightly different interatomic distances between the central atom and the seven surrounding atoms (to 3 atoms, 3 atoms, and 1 atom respectively). There are right-handed and left-handed 3-fold screw axes without there being a symmetry element taking one to the other. (Three-fold screw axes also exist in sodium chloride but are related by a mirror.) This means that iron monosilicide crystals exist in two different enantiomorphs. In 1948 Linus Pauling investigated the nature of the bonds in iron monosilicide. (en) Силицид железа — бинарное неорганическое соединениежелеза и кремния с формулой FeSi,желтовато-серые кристаллы,не растворяется в воде. (ru) |
| dbo:alternativeName |
Naquite, fersilicite (en) |
| dbo:iupacName |
Iron silicide (en) |
| dbo:thumbnail |
wiki-commons:Special:FilePath/MnSi_lattice.png?width=300 |
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5671 (xsd:nonNegativeInteger) |
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dbr:Cubic_crystal_system dbc:Iron_compounds dbr:Cobalt_monosilicide dbr:Electrical_resistivity dbr:Linus_Pauling dbr:Manganese_monosilicide dbr:Chirality dbc:Iron_monosilicide_structure_type dbr:Direct_and_indirect_band_gaps dbr:Iron dbr:Iron_germanide dbr:Silicide dbc:Transition_metal_silicides dbr:Sodium_chloride dbr:Ferrosilicon dbr:Enantiomorphic dbr:Semiconductor dbr:Naquite dbr:Pearson_symbol dbr:Inversion_center dbr:Body_diagonal dbr:Intermetallic_compound |
| dbp:imagecaption |
Structures of left-handed and right-handed FeSi crystals. The top presentation shows the eight atoms of the unit cell. The middle shows polyhedra surrounding the iron atoms. The bottom show the presence of screw axes. (en) |
| dbp:imagefile |
MnSi lattice.png (en) |
| dbp:iupacname |
Iron silicide (en) |
| dbp:othernames |
Naquite, fersilicite (en) |
| dbp:verifiedfields |
changed (en) |
| dbp:watchedfields |
changed (en) |
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dbt:Chembox dbt:Chembox_Hazards dbt:Chembox_Identifiers dbt:Chembox_Properties dbt:E dbt:Iron_compounds dbt:Reflist dbt:Cascite dbt:Chembox_Related dbt:Chembox_Structure dbt:Chemspidercite |
| dcterms:subject |
dbc:Iron_compounds dbc:Iron_monosilicide_structure_type dbc:Transition_metal_silicides |
| rdf:type |
owl:Thing dul:ChemicalObject dbo:ChemicalSubstance wikidata:Q11173 dbo:ChemicalCompound |
| rdfs:comment |
Eisensilicid ist eine von mehreren anorganischen chemischen Verbindungen zwischen Eisen und Silizium. (de) Силицид железа — бинарное неорганическое соединениежелеза и кремния с формулой FeSi,желтовато-серые кристаллы,не растворяется в воде. (ru) Iron monosilicide (FeSi) is an intermetallic compound, a silicide of iron that occurs in nature as the rare mineral naquite. It is a narrow-bandgap semiconductor with a room-temperature electrical resistivity of ca. 10,000 Ohm·cm and unusual magnetic properties at low temperatures. FeSi has a cubic crystal lattice with no inversion center; therefore its magnetic structure is helical, with right-hand and left-handed chiralities. In 1948 Linus Pauling investigated the nature of the bonds in iron monosilicide. (en) |
| rdfs:label |
Eisensilicid (de) Iron monosilicide (en) Силицид железа (ru) |
| owl:sameAs |
wikidata:Iron monosilicide dbpedia-de:Iron monosilicide dbpedia-ru:Iron monosilicide https://global.dbpedia.org/id/Z6gy |
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wikipedia-en:Iron_monosilicide?oldid=1051375194&ns=0 |
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wiki-commons:Special:FilePath/MnSi_lattice.png |
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wikipedia-en:Iron_monosilicide |
