prov:value
| - As the second material, there may be used the metals such as Pb, Bi, Ag, Sn, Sb, Te, Se, Cu, Mg, Sc, Y, Ti, Cd, Zn, In, Si, Ge, As, Al, Ga, Cr, Mn, Fe, etc., metal oxides such as ZnO, Sb2 O3, In2 O, InO, In2 O3, OsO4, CdO, Ga2 O, Ga2 O3, Ag2 O, Co2 O3, MoO3, SnO, SnO2, Tl2 O, WO3, Bi2 O3, TeO2, PbO, Pb3 O4, PbO2, Nb2 O5, V2 O5, Ni2 O3, etc., metal halides such as PbI2, BiI3, AgI, SnI2, SnI4, SbI3,
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