Any binary chemical compound containing just silicon and another chemical element
Binary compounds of silicon are binarychemical compounds containing silicon and one other chemical element.[1] Technically the term silicide is reserved for any compounds containing silicon bonded to a more electropositive element. Binary silicon compounds can be grouped into several classes. Saltlike silicides are formed with the electropositive s-block metals. Covalent silicides and silicon compounds occur with hydrogen and the elements in groups 10 to 17.
Transition metals form metallic silicides, with the exceptions of silver, gold and the group 12 elements. The general composition is MnSi or MSin with n ranging from 1 to 6 and M standing for metal. Examples are M5Si, M3Si (Cu, V, Cr, Mo, Mn, Fe, Pt, U), M2Si (Zr, Hf, Ta, Ir, Ru, Rh, Co, Ni, Ce), M3Si2 (Hf, Th, U), MSi (Ti, Zr, Hf, Fe, Ce, Th, Pu) and MSi2 (Ti, V, Nb, Ta, Cr, Mo, W, Re).
The Kopp–Neumann law applies; heat capacities are linear in the proportion of silicon:
As a general rule, nonstochiometry implies instability. These intermetallics are in general resistant to hydrolysis, brittle, and melt at a lower temperature than the corresponding carbides or borides. They are electrical conductors. However, some, such as CrSi2, Mg2Si, β-FeSi2 and MnSi1.7, are semiconductors. Since degenerate semiconductors exhibit some metallic properties, such as luster and electrical conductivity which decreases with temperature, some silicides classified as metals may be semiconductors.
Many cluster compounds of lithium silicides are known, such as Li13Si4, Li22Si5, Li7Si3 and Li12Si7.[2] Li4.4Si is prepared from silicon and lithium metal in high-energy Ball mill process.[3] Potential uses include electrodes in lithium batteries. Li12Si7 has a Zintl phase with planar Si56− rings. Li NMR spectroscopy suggests these rings are aromatic.[4]
Other group 1 elements also form clusters: sodium silicide can be represented by NaSi, NaSi2 and Na11Si36[5] and potassium silicide by K8Si46. Group 1 silicides are in general high melting, metallic grey, with moderate to poor electrical conductance and prepared by heating the elements. Superconducting properties have been reported for Ba8Si46.[6] Several silicon Zintl ions (Si4− 4, Si4− 9, Si2− 5) are known with group 1 counterions.[7]
Group 2
Silicides of group 2 elements are also saltlike silicides except for beryllium whose phase diagram with silicon is a simple eutectic (1085 °C @ 60% by weight silicon).[8] Again there is variation in composition: magnesium silicide is represented by Mg2Si,[9]calcium silicide can be represented by Ca2Si, CaSi, CaSi2, Ca5Si3 and by Ca14Si19,[10] strontium silicide can be represented by Sr2Si, SrSi2 and Sr5Si3[11] and barium silicide can be represented by Ba2Si, BaSi2, Ba5Si3 and Ba3Si4.[12] Mg2Si, and its solid solutions with Mg2Ge and Mg2Sn, are good thermoelectric materials and their figure of merit values are comparable with those of established materials.
Transition and inner transition metals
The transition metals form a wide range of silicon intermetallics with at least one binary crystalline phase. Some exceptions exist. Gold forms a eutectic at 363 °C with 2.3% silicon by weight (18% atom percent) without mutual solubility in the solid state.[13]Silver forms another eutectic at 835 °C with 11% silicon by weight, again with negligible mutual solid state solubility. In group 12 all elements form a eutectic close to the metal melting point without mutual solid-state solubility: zinc at 419 °C and > 99 atom percent zinc and cadmium at 320 °C (< 99% Cd).
Commercially relevant intermetallics are group 6molybdenum disilicide, a commercial ceramic mostly used as an heating element. Tungsten disilicide is also a commercially available ceramic with uses in microelectronics. Platinum silicide is a semiconductor material. Ferrosilicon is an iron alloy that also contains some calcium and aluminium.
MnSi, known as brownleeite, can be found in outer space. Several Mn silicides form a Nowotny phase. Nanowires based on silicon and manganese can be synthesised from Mn(CO)5SiCl3 forming nanowires based on Mn19Si33.[14] or grown on a silicon surface[15][16][17] MnSi1.73 was investigated as thermoelectric material[18] and as an optoelectronic thin film.[19] Single-crystal MnSi1.73 can form from a tin-lead melt[20]
In the frontiers of technological research, iron disilicide is becoming more and more relevant to optoelectronics, specially in its crystalline form β-FeSi2.[21][22] They are used as thin films or as nanoparticles, obtained by means of epitaxial growth on a silicon substrate.[23][24]
Silicon carbide (SiC) is widely used as a ceramic or example in car brakes and bulletproof vests. It is also used in semiconductor electronics. It is manufactured from silicon dioxide and carbon in an Acheson furnace between 1600 and 2500 °C. There are 250 known crystalline forms with alpha silicon carbide the most common. Silicon itself is an important semiconductor material used in microchips. It is produced commercially from silica and carbon at 1900 °C and crystallizes in a diamond cubic crystal structure. Germanium silicide forms a solid solution and is again a commercially used semiconductor material.[83] The tin–silicon phase diagram is a eutectic[84] and the lead–silicon phase diagram shows a monotectic transition and a small eutectic transition but no solid solubility.[85]
Group 15
Silicon nitride (Si3N4) is a ceramic with many commercial high-temperature applications such as engine parts. It can be synthesized from the elements at temperatures between 1300 and 1400 °C. Three different crystallographic forms exist. Other binary silicon nitrogen compounds have been proposed (SiN, Si2N3, Si3N)[86] and other SiN compounds have been investigated at cryogenic temperatures (SiN2, Si(N2)2, SiNNSi).[87]Silicon tetraazide is an unstable compound that easily detonates.
The phase diagram with phosphorus shows SiP and SiP2.[88] A reported silicon phosphide is Si12P5 (no practical applications),[89][90] formed by annealing an amorphous Si-P alloy.
The arsenic–silicon phase diagram measured at 40 Bar has two phases: SiAs and SiAs2.[91] The antimony–silicon system comprises a single eutectic close to the melting point of Sb.[92] The bismuth system is a monotectic.[93]
Group 16
In group 16 silicon dioxide is a very common compound that widely occurs as sand or quartz. SiO2 is tetrahedral with each silicon atom surrounded by 4 oxygen atoms. Numerous crystalline forms exist with the tetrahedra linked to form a polymeric chain. Examples are tridymite and cristobalite. A less common oxide is silicon monoxide that can be found in outer space. Unconfirmed reports exist for nonequilibrium Si2O, Si3O2, Si3O4, Si2O3 and Si3O5.[94]Silicon sulfide is also a chain compound. Cyclic SiS2 has been reported to exist in the gas phase.[95] The phase diagram of silicon with selenium has two phases: SiSe2 and SiSe.[96] Tellurium silicide is a semiconductor with formula TeSi2 or Te2Si3.[97]
Group 17
Binary silicon compounds in group 17 are stable compounds ranging from gaseous silicon fluoride (SiF4) to the liquids silicon chloride (SiCl4 and silicon bromide SiBr4) to the solid silicon iodide (SiI4). The molecular geometry in these compounds is tetrahedral and the bonding mode covalent. Other known stable fluorides in this group are Si2F6, Si3F8 (liquid) and polymeric solids known as polysilicon fluorides (SiF2)x and (SiF)x. The other halides form similar binary silicon compounds.[98]
The periodic table of the binary silicon compounds
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^Tungsten: Properties, Chemistry, Technology of the Element, Alloys, and Chemical Compounds Lassner, Erik, Schubert, Wolf-Dieter 1999
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Unit of the National Guard of UkraineThis article may require copy editing for grammar, style, cohesion, tone, or spelling. You can assist by editing it. (June 2023) (Learn how and when to remove this template message)2nd Battalion of Special Assignment DonbasUkrainian: 2-й батальйон спеціального призначення НГУ «Донбас»Donbas Battalion emblemFounded2014 (2014)Country UkraineBranch National Guard of UkraineSize900[1]Garrison/HQSeve...
Banned political party in Ukraine For the post-Soviet banned party, see Communist Party of Ukraine and Communist Party of Ukraine (renewed). Not to be confused with Ukrainian Communist Party or Ukrainian Communist Party (Borotbists). This article needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: Communist Party of Ukraine Soviet Union – news...
Testing before a blood transfusion This article needs more reliable medical references for verification or relies too heavily on primary sources. Please review the contents of the article and add the appropriate references if you can. Unsourced or poorly sourced material may be challenged and removed.Find sources: Cross-matching – news · newspapers · books · scholar · JSTOR (November 2021) Cross-matchingCompatibility testing concerning RBCsMeSHD001788&...
عيش فينومعلومات عامةالمنشأ مصر تعديل - تعديل مصدري - تعديل ويكي بيانات عيش فينو عبارة عن لفافة خبز طويلة على شكل خبز فرنسي، ومصدرها مصر مصنوعة من دقيق القمح. إنه أكثر أنواع الخبز شيوعًا في البلاد بعد الخبز البلدي. لها قوام ناعم وغالبًا ما يتم تقطيعها للسماح بالحشو، وتشمل الأن
Stade d'AbidjanDatos generalesNombre Stade d'AbidjanFundación 1936Entrenador Akéssé LewisInstalacionesEstadio Stade Robert ChamprouxCapacidad 3.000Ubicación Abiyán, Costa de MarfilUniforme Titular Alternativo Última temporadaLiga Primera División de Costa de Marfil(2017-18) 13º [editar datos en Wikidata] El Stade d'Abidjan es un equipo de fútbol de Costa de Marfil que participa en la Segunda División de Costa de Marfil, la segunda categoría de fútbol en el país. Histori...
ملك جوسون غيونغجونغ (بالكورية: 이윤) ملك جوسون فترة الحكممن 1720 إلى 1724 مرافق الملكة دانيالملكة سوني معلومات شخصية الميلاد 20 نوفمبر 1688(1688-11-20)قصر تشانغيونغ الوفاة 11 أكتوبر 1724 (35 سنة)قصر تشانغيونغ مكان الدفن ويرنغ مواطنة مملكة جوسون الأب الملك سكجونغ الأم هيبن من ...
2008 video game 2008 video gameStar Wars: The Force UnleashedDeveloper(s)LucasArts[a]Publisher(s)LucasArts[b]Director(s)Haden BlackmanProducer(s)George LucasIsa Anne StamosMatthew J. FillbrandtJulio TorresFranklin AliotoDesigner(s)John StaffordRich DavisProgrammer(s)Cédrick CollombArtist(s)Matt OmernickWriter(s)Haden BlackmanShawn PitmanJohn StaffordCameron SueyComposer(s)Mark GriskeyPlatform(s)iOSJ2MEN-GageNintendo DSPlayStation 2PlayStation 3PlayStation PortableWiiXbox 360M...
Embioptera TaksonomiKerajaanAnimaliaFilumArthropodaKelasInsectaOrdoEmbioptera Lameere, 1900 lbs Embioptera adalah salah satu ordo serangga yang memiliki 500 spesies yang diketahui. Ordo ini sebelumnya bernama Embiidina. Serangga dalam ordo ini umumnya memiliki panjang 4–10 mm dengan pengecualian beberapa spesies panjangnya 1 cm. Serangga ini menyebar di area tropis dan subtropis dengan habitat ketinggian maksimal 4000 dpl. Serangga ini pada masa Permian memiliki sayap, tetapi pada...
Sajus na Demokratitschnite Sili Parteivorsitzender Rumen Christow Gründung 7. Dezember 1989 Ausrichtung konservativ, christdemokratisch Farbe(n) blau Narodno Sabranie November 2021:3/240(als Teil des Wahlbündnis GERB – SDS) Internationale Verbindungen IDU, CDI Europaabgeordnete 1/17(als Teil des Wahlbündnis GERB – SDS) Europapartei EVP EP-Fraktion EVP Website www.sds.bg Die Union der Demokratischen Kräfte (bulgarisch Съюз на демократичните сили/Saju...
Robert and Mariam Hayes StadiumThe HayesFormer namesTom and Lib Phillips Field (1988–2006)LocationUniversity of North Carolina at CharlotteOwnerUNC CharlotteCapacity1,100 (seated)3,000 (standing room)Field sizeLeft field: 335 ftLeft Center Field: 370 ftCenter Field: 390 ftRight Center Field: 370 ftRight field: 335 ftSurfaceTurf Infield, Natural Grass OutfieldConstructionOpenedFebruary 25, 1984 (initial) March 30, 2007 (reopened)Construction cost$5.9 million($8.56 million in 2022 dollar...
This article is about the film. For the radio telescope in the hills above Stanford University, see Stanford Dish. For the radio telescope in Australia, see Parkes Observatory. For the television program, see The Dish (TV series). For other uses, see dish (disambiguation). 2000 Australian filmThe DishTheatrical release posterDirected byRob SitchWritten bySanto CilauroTom GleisnerJane KennedyRob SitchProduced bySanto CilauroTom GleisnerMichael HirshJane KennedyRob SitchStarringSam NeillKevin H...
German zoologist and professor Oscar HertwigOscar Hertwig by Nicola PerscheidBorn21 April 1849Friedberg, HesseDied25 October 1922 (1922-10-26) (aged 73)BerlinNationalityGermanKnown forStudy of protistsScientific careerFieldsZoology Illustration from O. Hertwig's book Lehrbuch der Entwicklungsgeschichte des Menschen und der Wirbeltiere (Textbook of developmental history of humans and vertebrates), 1906. Oscar Hertwig (21 April 1849 in Friedberg – 25 October 1922 in Berlin) was...
2016 American horror drama television The ExorcistGenreSupernaturalHorrorCreated byJeremy SlaterBased onThe Exorcistby William Peter BlattyStarring Alfonso Herrera Ben Daniels Hannah Kasulka Brianne Howey Kurt Egyiawan Alan Ruck Geena Davis Li Jun Li Brianna Hildebrand John Cho Zuleikha Robinson Composers Daniel Hart (season 1) Tyler Bates (season 2) Country of originUnited StatesOriginal languageEnglishNo. of seasons2No. of episodes20ProductionExecutive producers Jeremy Slater Rolin Jones Ru...
Commune and town in Kayes Region, MaliNioro Tougouné RangabéCommune and townNioro Tougouné RangabéLocation in MaliCoordinates: 15°13′12″N 8°51′14″W / 15.220°N 8.854°W / 15.220; -8.854Country MaliRegionKayes RegionCercleNioro du Sahel CerclePopulation (2009 census)[1] • Total11,510Time zoneUTC+0 (GMT) Nioro Tougouné Rangabé (also Nioro Tougouné Rangaba) is a small town and commune in the Cercle of Nioro in the Kayes Regio...
Mixture used to improve soil fertility Composting redirects here. Not to be confused with Compositing. Humanure redirects here. For the album by Cattle Decapitation, see Humanure (album). Not to be confused with Manure or Potting compost. Community-level composting in a rural area in Germany Compost is a mixture of ingredients used as plant fertilizer and to improve soil's physical, chemical, and biological properties. It is commonly prepared by decomposing plant and food waste, recycling org...
1930 film Sunny SkiesDirected byNorman TaurogWritten byGeorge ClevelandStory byA. P. YoungerProduced byPhil GoldstoneStarringBenny RubinMarceline Day Marjorie KaneCinematographyArthur ReevesEdited byClarence KolsterMusic byAl ShortProductioncompanyTiffany PicturesDistributed byTiffany PicturesRelease dateMay 18, 1930Running time73 minutesCountryUnited StatesLanguageEnglish Sunny Skies is a 1930 American Pre-Code musical comedy film directed by Norman Taurog, starring Benny Rubin and Marceline...
Aerial TramwayThe Palm Springs Aerial Tramway – a car climbing from the valley station below. The Palm Springs Aerial Tramway in Palm Springs, California, is the largest rotating aerial tramway in the world. It was opened in September 1963 as a way of getting from the floor of the Coachella Valley to near the top of San Jacinto Peak and was constructed in rugged Chino Canyon. Before its construction, the only way to the top of the mountain was to hike hours from Idyllwild. The rotating cars...
Prismálbum en directo de Pink FloydPublicación 21 de septiembre de 1987Grabación Filadelfia, Estados Unidos, 19 de septiembre de 1987 (En Vivo)Género(s) Rock progresivoDiscográfica EMI Records (Reino Unido), Columbia Records (Estados Unidos)Productor(es) James Guthrie, David GilmourCalificaciones profesionales Progarchives Enlace Cronología de álbumes en directo de Pink Floyd Ummagumma ((1969)) Prism ((1987)) Delicate Sound of Thunder ((1988)) [editar datos en Wikidata] Prism...
2004 DC Comics title Superman: True BritCover of Superman: True Brit, first published in Oct 30, 2004.[1]Publication informationPublisherDC ComicsFormatOne-shotGenre Superhero No. of issues1Main character(s)SupermanCreative teamWritten byJohn CleeseArtist(s)John Byrne Superman: True Brit is a DC Comics Elseworlds first published in 2004 in the US, and by Titan Books in the UK. Written by John Cleese and Kim Howard Johnson, with art by John Byrne and Mark Farmer, it reimagines the orig...