This work was partly supported by Ministry of Science and Higher Education(Poland)and funded from Science Resources:No.1S-0300–500-1-05-06 and UPB-DZS 518-10-020-3101-01/18;One of us(M.Maciejkowicz)would like to thank for the financial support from National Science Center of Poland for the grant PRELUDIUM 14 No.UMO-2017/27/N/ST8/00741.
Gd^3+-doped lead molybdato–tungstates with the chemical formula of Pb1–3xxGd2x(MoO4)1–3x(WO4)3x(where x=0.0455,0.0839,0.1430,corresponding to 9.53,18.32,33.37 mol%of Gd^3+,respectively,as well asdenotes cationic va...