Grandidierite has unit cell dimension a =1.097?8, b =1.033?5, c =0.576?0?nm,space group Pbum ,and chemical equation to MgAl 2Al[SiO 4][BO 3]O 2, d values of three strongest diffraction peaks are 5.482(9)、5.17(10)、5....Grandidierite has unit cell dimension a =1.097?8, b =1.033?5, c =0.576?0?nm,space group Pbum ,and chemical equation to MgAl 2Al[SiO 4][BO 3]O 2, d values of three strongest diffraction peaks are 5.482(9)、5.17(10)、5.04(10).Grandidierite occurs four peaks of infrared absorption spectra:943,688,568,407?cm 1 .Coordination of Mg is five in grandidierite by X ray absorption near edge spectra(XANES).展开更多
文摘Grandidierite has unit cell dimension a =1.097?8, b =1.033?5, c =0.576?0?nm,space group Pbum ,and chemical equation to MgAl 2Al[SiO 4][BO 3]O 2, d values of three strongest diffraction peaks are 5.482(9)、5.17(10)、5.04(10).Grandidierite occurs four peaks of infrared absorption spectra:943,688,568,407?cm 1 .Coordination of Mg is five in grandidierite by X ray absorption near edge spectra(XANES).
