";s:4:"text";s:2826:"The spinels have the general formula AB2X4. 2013FY1109000-3).The following is available online, Table S1: Some thermodynamic equilibrium experiments details and results.The authors declare no conflict of interest.X.L. Answered In normal spinel structures of MgAl2O4 the percentage of tetrahedral voids occupied is? and Y.M.
1) W. J. Tropf and M. E. Thomas, Magnesium aluminum spinel (MgAlO 4), in E. D. Palik (ed. According to formula MgAl2O4 oxygen contains 4 atoms that means it is forming CCP or FCC also there is only 1 mg atom and 2 Al atom.Z=4Octahedral voids=4Tetrahedral voids=8As mg is occupying tetrahedral voids so percentage = (1/8)×100=12.5%.And percentage of octahedral voids occupied by Al atoms=(2/4)×100=50%. The sintering kinetics of a pure magnesium aluminate spinel, MgAl2O4, and that doped with LiF were determined through the use of the master sintering curve technique developed by Su and Johnson. 20 Powders with 0%, 0.5%, and 1.0% by mass LiF were densified in a vacuum hot press under a range of unaxial pressures. Given this resilience, the likelihood of radi- ation induced swelling and microcrack formation is dramatically supressed. keertanachiguru3581 27.04.2018 Chemistry Secondary School +13 pts. U. Anderson—contributing editorPlease check your email for instructions on resetting your password. 1 illustrates the arrangement of the Mg (Zn), Al and O atoms in a unit cell of normal spinel [15,16]. Magnesium aluminate (MgAl2O4) spinel has demonstrated a strong resis- tance under irradiation to the formation of large defect aggregates such as dislocation loops and voids. It suggests that the Al 3+ cations can occupy more than one position in the structure and the site … The classic example is MgAl2O4 where Mg is the M(II) cation and Al the M(III) cation. Necessary cookies are absolutely essential for the website to function properly. This study was financially supported by the DREAM project of MOST, China (Grant No. 2 provides improved Sellmeier equation based … Join now. According to formula MgAl 2 O 4, if there are 4 oxide ions then the compound will contain 1 Mg +2 ion and 2 Al +3 ions.. Now, for 4 O-2 ions in ccp arrangement, there will be 4 octahedral voids and 8 tetrahedral voids, so. X.L. Since, Mg 2+ ion is in tetrahedral field and Al +3 ion is in tetrahedral field, so the spinel is a normal spinel.. This category only includes cookies that ensures basic functionalities and security features of the website. 881-895 2) Handbook of Optics, 3rd edition, Vol.