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Varykhalov
As-Ba-Fe-K
Bi-Te
Ir-O-Sr
Ir-La-O-Sr
S-Si-Zr
superconductivity
superconductivity energy gap
values of superconductivity energy gap
electronic and electrical properties
optical properties
transitional
metalloid
alkaline
pnictogen
quaternary
orthorhombic
tetragonal
trigonal