Silicon oxynitride

Silicon oxynitride
Names
	Other names Silicon nitride oxide, dinitride disilicon oxide
Identifiers
CAS Number	Si2N2O: 12033-76-0 ;
ECHA InfoCard	100.031.617
EC Number	Si2N2O: 234-793-1;
Properties
Chemical formula	N2OSi2
Molar mass	100.183 g·mol−1
Appearance	Colorless crystals
Density	2.81 g·cm−3
Structure
Crystal structure	Orthorhombic
Space group	Cmc21 No 36, Pearson symbol oS20
Lattice constant	a = 0.48553 nm, b = 0.52194 nm, c = 0.52194 nm, Z = 4
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Silicon oxynitride is a ceramic material with the chemical formula SiO_xN_y. While in amorphous forms its composition can continuously vary between SiO₂ (silica) and Si₃N₄ (silicon nitride), the only known intermediate crystalline phase is Si₂N₂O.^[2] It is found in nature as the rare mineral sinoite in some meteorites and can be synthesized in the laboratory.^[3]

^ Ohashi, Masayoshi; et al. (1993). "Solid Solubility of Aluminum in O'-SiAlON". J. Am. Ceram. Soc. 76 (8): 2112–2114. doi:10.1111/j.1151-2916.1993.tb08343.x.
^ Hillert M, Jonsson S, Sundman B (1992). "Thermodynamic Calculation of the Si-N-O System". Z. Metallkd. 83: 648–654.
^ Ryall, W. R.; Muan, A. (1969). "Silicon Oxynitride Stability". Science. 165 (3900): 1363–4. Bibcode:1969Sci...165.1363R. doi:10.1126/science.165.3900.1363. PMID 17817887. S2CID 22339579.

[str-1] Ohashi, Masayoshi; et al. (1993). "Solid Solubility of Aluminum in O'-SiAlON". J. Am. Ceram. Soc. 76 (8): 2112–2114. doi:10.1111/j.1151-2916.1993.tb08343.x.

[2] Hillert M, Jonsson S, Sundman B (1992). "Thermodynamic Calculation of the Si-N-O System". Z. Metallkd. 83: 648–654.

[3] Ryall, W. R.; Muan, A. (1969). "Silicon Oxynitride Stability". Science. 165 (3900): 1363–4. Bibcode:1969Sci...165.1363R. doi:10.1126/science.165.3900.1363. PMID 17817887. S2CID 22339579.

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