Editing Magnesium oxide (section)

==Related oxides==
While "magnesium oxide" normally refers to MgO, the compound [[magnesium peroxide]] MgO<sub>2</sub> is also known. According to evolutionary crystal structure prediction,<ref>{{cite journal| last = Zhu| first = Qiang| author2 = Oganov A.R.| author3 = Lyakhov A.O.| title = Novel stable compounds in the Mg-O system under high pressure| journal = Phys. Chem. Chem. Phys.| year = 2013| volume = 15| issue = 20| pages = 7696–7700| url = http://uspex.stonybrook.edu/pdfs/Mg-O-paper-2013.pdf| doi = 10.1039/c3cp50678a| pmid = 23595296| bibcode = 2013PCCP...15.7696Z| access-date = 2013-11-06| archive-date = 2013-12-03| archive-url = https://web.archive.org/web/20131203011451/http://uspex.stonybrook.edu/pdfs/Mg-O-paper-2013.pdf| url-status = dead}}</ref> MgO<sub>2</sub> is thermodynamically stable at pressures above 116 GPa (gigapascals), and a semiconducting [[suboxide]] Mg<sub>3</sub>O<sub>2</sub> is thermodynamically stable above 500 GPa. Because of its stability, MgO is used as a model system for investigating vibrational properties of crystals.<ref>{{cite journal| last= Mei| first = AB|author2=O. Hellman|author3=C. M. Schlepütz|author4= A. Rockett|author5= T.-C. Chiang|author6= L. Hultman|author7= I. Petrov|author-link7=Ivan Georgiev Petrov|author8= J. E. Greene|author-link8=J. E. Greene|title= Reflection Thermal Diffuse X-Ray Scattering for Quantitative Determination of Phonon Dispersion Relations.|journal=Physical Review B|volume= 92| issue = 17|year= 2015|page=174301| doi=10.1103/physrevb.92.174301|bibcode=2015PhRvB..92q4301M|doi-access= free}}</ref>