Magnesium silicide

Base Information

• Chemical Name: Magnesium silicide
• CAS No.: 22831-39-6
• Deprecated CAS: 1313-07-1,310402-17-6,1270160-10-5,1402143-05-8,1448517-05-2,2007918-24-1,1270160-10-5,1402143-05-8,310402-17-6
• Molecular Formula: Mg₂Si
• Molecular Weight: 76.6955
• European Community (EC) Number: 245-254-5
• UN Number: 2624
• DSSTox Substance ID: DTXSID4066830
• Wikipedia: Magnesium_silicide
• Wikidata: Q421028
• Mol file: 22831-39-6.mol

Synonyms:Magnesium silicide;22831-39-6;Magnesium silicide (Mg2Si);Dimagnesium silicide;Dimagnesium monosilicide;UN2624;Magnesium silicide, powder;UNII-475E6FMG3K;EINECS 245-254-5;39404-03-0;Magnesium silicide [UN2624] [Dangerous when wet];MFCD00016202;Magnesiumsilicid;Mg.Si;Mg2Si;Mg2-Si;475E6FMG3K;Siliciuro de magnesio (Mg2Si);DTXSID4066830;NA2624;AKOS030228358;Q421028;Magnesium silicide, pieces, 99.7% trace metals basis;Magnesium silicide, >=99% trace metals basis, -20 mesh

Chemical Property of Magnesium silicide

Chemical Property:

• Appearance/Colour: blue crystals
• Melting Point: 1102 °C
• Boiling Point: °Cat760mmHg
• Flash Point: °C
• PSA: 0.00000
• Density: g/cm³
• LogP: -0.38080
• Sensitive.: Air & Moisture Sensitive
• Water Solubility.: Insoluble in water and denser than water.
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 0
• Rotatable Bond Count: 0
• Exact Mass: 75.9470099
• Heavy Atom Count: 3
• Complexity: 18.3
• Transport DOT Label: Dangerous When Wet

Purity/Quality:

98%Min ^*data from raw suppliers

Magnesium silicide ^*data from reagent suppliers

Safty Information:

• Pictogram(s): F
• Hazard Codes: F
• Statements: 14-14/15
• Safety Statements: 7/8-43

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Metals -> Metals, Inorganic Compounds
• Canonical SMILES: [Mg]=[Si]=[Mg]
• Description: Magnesium silicide has the molecular formula of Mg2Si and the molecular weight of 76.6955 g/mol. Its density is 1.998 g/cc and its melting point is 1102°C. It is a black powder.Mg2Si crystallizes in a cubic CaF2 (fluorspar)-type lattice with a = 4.49 ? . The centers of this lattice are analogous to that of diamond. Each Si atom forms four covalent sp3 bonds. The Mg subshells are only half-filled. There is no bonding between the two Mg atom sites. The distance between the Mg and Si atoms is 2.77 ? . Bonding in this compound is essentially covalent.
• Physical properties: Magnesium silicide is unstable in air and reacts with moisture to form silane. When magnesium silicide is placed into aqueous HCl, the gas silane, SiH4, is produced. This gas is the silicon analogue of methane, CH4, but is more reactive. Silane is pyrophoric, that is due to the presence of O2 in the air, i.e. it spontaneously combusts in air. These reactions are typical of a Group-2 silicide. Mg2Si reacts similarly with sulfuric acid. As a powder, magnesium silicide is dark blue or slightly purple in color.
• Uses: Magnesium silicide is used to produce alloys such as aluminum alloys. It is also used in food, beverages, as a flavor enhancer and as an intermediate in chemical research. Magnesium silicide (Mg2Si) can be used as a thermoelectric material for the fabrication of thermoelectric (TE) devices. It can also be used as a counter electrode for lithium-ion batteries. It can generally be synthesized as a nanoparticle that can be utilized as a deoxygenation agent. In semiconductor research. Has been used to build Mg-Si rectifiers.

Technology Process of Magnesium silicide

There total 48 articles about Magnesium silicide which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 92.6%

magnesium (7439-95-4) + silicon (7440-21-3) → magnesium silicide (22831-39-6)

Guidance literature:

With hydrogen; In melt; at 699.84 ℃; for 10h; Temperature; Time; Inert atmosphere;

DOI:10.1016/j.jallcom.2015.07.291

Reference yield: 81.1%

boron + magnesium (7439-95-4) → magnesium diboride + magnesium silicide (22831-39-6) + magnesium oxide

Guidance literature:

With SiC; In neat (no solvent, solid phase); pressing mixt. of Mg, B in 1:2 stoich. ratio with addn. of SiC into pellets, sintered at 700-900 °C for 1 h in flowing Ar, cooling; X-ray diffraction;

DOI:10.1063/1.1591070

Reference yield:

sodium magnesium hydride + magnesium hydride + silicon (7440-21-3) → magnesium silicide (22831-39-6) + hydrogen (1333-74-0) + sodium hydride (7646-69-7)

Guidance literature:

sodium magnesium hydride; magnesium hydride; silicon; With magnesium oxide; In neat (no solvent, solid phase); at -196.16 ℃; for 0.5h; Milling;

In neat (no solvent, solid phase); at 50 - 350 ℃; for 2h;

DOI:10.1016/j.jallcom.2014.10.086

upstream raw materials:

magnesium

tetrachlorosilane

silica gel

ethyl iodide

Downstream raw materials:

titanium disilicide

disilane

hexasilane

Si₈H₁₈-cluster

Refernces

• 1、 Yang, Xiaomeng,Chen, Shaoping,Zhang, Hua,Lv, Feng,Fan, Wenhao,Wang, Wenxian,Munir, Zuhair A.. "Thermoelectric Properties and Transport Mechanism of Pure and Bi-Doped SiNWs-Mg2Si". . . Retrieved 2018.
• 2、 Liang, Jianwen,Li, Xiaona,Hou, Zhiguo,Guo, Cong,Zhu, Yongchun,Qian, Yitai. "Nanoporous silicon prepared through air-oxidation demagnesiation of Mg2Si and properties of its lithium ion batteries". . p. 7230 - 7233. Retrieved 2015.
• 3、 Herbst,Meyer. "Structural, electronic, and hydriding properties of Li2MgSi". . p. 65 - 68. Retrieved 2010.
• 4、 Tani, Jun-Ichi,Kido, Hiroyasu. "Thermoelectric properties of Bi-doped Mg2Si semiconductors". . p. 218 - 224. Retrieved 2005.
• 5、 Senkov,Cavusoglu,Froes. "Synthesis of a low-density Ti-Mg-Si alloy". . p. 246 - 252. Retrieved 2000.
• 6、 Isoda,Tada,Shioda,Shinohara. "Si-particle-size dependence of Mg2Si powders directly produced by liquid-solid synthesis method". . p. 598 - 603. Retrieved 2016.
• 7、 Chen,Yang,Gao,Li,Yu,Ma,Yuan. "Non-isothermal crystallization kinetics of Mg60Zn30Ti5Si5amorphous alloy prepared by mechanical alloying". . p. 174 - 178. Retrieved 2016.
• 8、 Ohashi, Naoki,Mora-Fonz, David,Otani, Shigeki,Ohgaki, Takeshi,Miyakawa, Masashi,Shluger, Alexander. "Inverse Perovskite Oxysilicides and Oxygermanides as Candidates for Nontoxic Infrared Semiconductor and Their Chemical Bonding Nature". . p. 18305 - 18313. Retrieved 2020.
• 9、 Ma, Xiaowei,Chen, Banghao,Latturner, Susan E.. "Synthesis and properties of new multinary silicides R5Mg 5Fe4AlxSi18-x (R = Gd, Dy, Y, x ≈ 12) grown in Mg/Al flux". . p. 6089 - 6095. Retrieved 2012.
• 10、 Yi, Su-In,Attari, Vahid,Jeong, Myunghwan,Jian, Jie,Xue, Sichuang,Wang, Haiyan,Arroyave, Raymundo,Yu, Choongho. "Strain-induced suppression of the miscibility gap in nanostructured Mg2Si-Mg2Sn solid solutions". . p. 17559 - 17570. Retrieved 2018.