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El jouhari
As-La-O-Sr-Tl
As-B-Cs-La-O
Ca-La-O-P-Rb-V
As-B-K-La-O
As-B-La-O-Rb
structural properties
effective charge
electronic and electrical properties
valence or charge transfer
values of luminescence
chalcogen
rare earth
pnictogen
metalloid
lanthanoid
trigonal