Refined crystal structures of the scandium garnets Ca3Sc2Si3O12, Ca3Sc2Ge3O12, and Cd3Sc2Ge3O12

Luminescence spectroscopy of Eu3+ in Ca3Sc2Si3O12

“…It corresponds to the mineral Eringaite [1], and its crystal structure has been shown three decades ago to be of the garnet type [2]. This material has proved to be a suitable host for luminescent lanthanide ions.…”

Synthesis and luminescence of sub-micron sized Ca3Sc2Si3O12:Ce green phosphors for white light-emitting diode and field-emission display applications

“…The XRD pattern of the sample fired at 1100 • C agrees with the powder data of Ca 3 Sc 2 Si 3 O 12 with a garnet-type structure (space group Ia3d, cubic system) in PDF card (No. 72-1969) [14]. Compared with other synthesis methods, pure Ca 3 Sc 2 Si 3 O 12 phase can be obtained at a relatively low temperature of 1100 • C by gel-combustion method.…”

Fully relativistic analysis of the absorption spectra of Ca3Sc2Ge3O12:Ni2+

“…The Ni 2+ -O 2-distance is 2.095 Å for the octahedral positions and 1.762 Å for the tetrahedral ones [6]. Since the electrical charges of the substituting and substituted ions are different, charge compensators, such as La 3+ and Zr 4+ are needed to maintain the electric neutrality of the samples.…”

“…CaSGG belongs to the family of garnet crystals (space group Ia3d) with lattice constant a = 12.512 Å [6]. The unit cell contains eight formula units.…”

“…The Cartesian coordinates of ions (in Å) in both clusters obtained by using the crystal structure data from [6] are listed in Table 2. In order to take into account the effects of the surroundings of the above model clusters, an effective Madelung potential was considered by locating several thousand point charges (with charges "+4" for germanium, "+3" for scandium, "+2" for calcium, and "-2" for oxygen ions) at atomic sites outside the cluster.…”