Manganese disilicide

Manganese disilicide  File:Кристаллы дисилицида марганца на пластинках кремния.tif

Electron micrograph of MnSi2 stars grown on Si plates

Names
IUPAC name

Manganese disilicide

Identifiers

CAS Number

* 12032-86-9 Y

3D model (JSmol)

* Interactive image

ChemSpider |

* 4891874

EC Number |

* 234-781-6

PubChem CID

* 6336881

InChI

* InChI=1S/Mn.2Si

Key: FHTCLMVMBMJAEE-UHFFFAOYSA-N

SMILES

* [Si]=[Mn]=[Si]

Properties

Chemical formula

| MnSi2
Molar mass | 111.109 g/mol
Appearance  | gray crystals[1]
Melting point |  1,152 °C (2,106 °F; 1,425 K)[1][3] dec.

Magnetic susceptibility (χ)

| 0.7×10−6 emu/g (MnSi1.72)[2]
Structure

Crystal structure

| Tetragonal[4]

Space group

| P4c2 (No. 116), tP44

Lattice constant

a = 0.5518 nm, c = 1.7449 nm

Formula units (Z)

| 4
Hazards
Flash point | Non-flammable
Related compounds

Other cations

| Cobalt disilicide
Iron disilicide
Titanium disilicide

Related compounds

| Manganese monosilicide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

N (what is YN ?)
Infobox references

Manganese disilicide (MnSi2) is an intermetallic compound, a silicide of manganese. It is a non-stoichiometric compound, with a silicon deficiency expressed as MnSi2–x. Crystal structures of many MnSi2–x compounds resemble a chimney ladder and are called Nowotny phases. They include MnSi2 (x=0), Mn4Si7 (x=0.250), Mn11Si19 (x=0.273), Mn15Si26 (x=0.267) and Mn27Si47 (x=0.259). These phases have very similar unit cells whose length varies from 1.75 nm for MnSi2 or Mn4Si7, which have almost the same structures, to 11.8 nm for Mn27Si47.[5]

Mn4Si7 structure

MnSi2–x Nowotny phases have a Mn sublattice with a β-tin structure overlaid with a face-centered cubic Si sublattice. They resemble chimneys of transition metal atoms containing spiraling ladders of Si. These phases are semiconductors with a band gap of 0.4 to 0.9 eV. They exhibit a reasonably high thermoelectric figure of merit ZT ~ 0.8 and have potential applications in thermoelectric generators.[5]

## References

1. ↑ 1.0 1.1 Haynes, William M., ed (2016). CRC Handbook of Chemistry and Physics (97th ed.). CRC Press. p. 4.73. ISBN 9781498754293.
2. ↑ Shinoda, Daizaburo; Asanabe, Sizuo (1966). "Magnetic Properties of Silicides of Iron Group Transition Elements". Journal of the Physical Society of Japan 21 (3): 555. doi:10.1143/JPSJ.21.555. Bibcode: 1966JPSJ...21..555S.
3. ↑ Levinson, Lionel M. (1973). "Investigation of the defect manganese silicide MnnSi2n−m". Journal of Solid State Chemistry 6 (1): 126–135. doi:10.1016/0022-4596(73)90212-0. Bibcode: 1973JSSCh...6..126L.
4. ↑ Shin, Yooleemi; Rhim, Sung Hyon; Duong, Anh Tuan; Nguyen, Van Quang; Hong, Soon Cheol; Cho, Sunglae; Park, Hyun-Min (2015). "New synthesis of MnSi2 thin film and its thermoelectric properties". Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films 33 (6): 061516. doi:10.1116/1.4932515. ISSN 0734-2101. Bibcode: 2015JVSTA..33f1516S.
5. ↑ 5.0 5.1 Higgins, Jeremy M.; Schmitt, Andrew L.; Guzei, Ilia A.; Jin, Song (2008). "Higher Manganese Silicide Nanowires of Nowotny Chimney Ladder Phase". Journal of the American Chemical Society 130 (47): 16086–16094. doi:10.1021/ja8065122. PMID 18983151.

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Manganese compounds

* MnO
* Mn3O4
* Mn5O8
* MnS
* MnS2
* MnSO4
* MnSe2
* MnSe
* MnTe
* Mn(NO3)2
* MnCO3
* MnCl2
* MnCl3
* MnCl4
* MnF2
* MnBr2
* MnI2
* MnTiO3
* MnMoO4
* Mn(CH3COO)2
* Mn2O3
* MnF3
* K6Mn2O6
* MnO2
* Mn(OH)2
* MnO3
* K3MnO4
* MnF4
* Na2MnO4
* K2MnO4
* Mn2O7
* NaMnO4
* KMnO4
* NH4MnO4
* AgMnO4
* Ca(MnO4)2
* Ba(MnO4)2
* MnH(CO)5
* Mn2(CO)10

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