Compound formation and Mn2+-activated luminescence in the binary systems R2O- and ROGa2O3
1968; Pergamon Press; Volume: 30; Issue: 1 Linguagem: Inglês
10.1016/0022-1902(68)80064-8
ISSN1878-1225
AutoresC. W. W. Hoffman, Jesse J. Brown,
Tópico(s)Inorganic Fluorides and Related Compounds
ResumoThe binary systems arising from combinations of Ga2O3 with the common oxides of Li, Na, K, Mg, Ca, Sr, Ba, Zn, Cd, and Pb have been investigated by solid state methods. Twenty compounds were isolated and their Mn2+-activated luminescence examined. The Li2O, Na2O, and K2O systems each contain two compounds (X2O·Ga2O3 and X2O·5Ga2O3); the MgO, ZnO, and CdO one (XO· Ga2O3); the SrO and BaO, three (4XO·Ga2O3, 3XO·Ga2O3, and XO·Ga2O3); and the PbO two (2PbO·Ga2O3 and PbO·Ga2O3). The three calcium gallate compounds previously reported (3CaO· Ga2O3, CaO·Ga2O3, and CaO·2Ga2O3), were confirmed. Four compounds were found to give significant Mn2+-activated luminescence; MgO·Ga2O3, ZnO·Ga2O3, K2O·5Ga2O3, and CaO·2Ga2O3 with characteristic peak emissions at 512, 513·5, 507 and 587 mn respectively. The crystal chemistry of AB2O4 compounds is discussed in view of the probable crystal structures of the compounds of this study and previous literature.
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