Abstract
Li0.55Ag0.45InSe2 crystals with orthorhombic structure were grown by the Bridgman-Stockbarger method with Li0.37Ag0.63InSe2 microcrystals of tetragonal modification found on their surface.The effect of substitution of silver and lithium ions on the evolution of structural properties in Li0.55Ag0.45InSe2 and Li0.37Ag0.63InSe2 phases was investigated. A fundamental difference in the change of unit cell parameters in the temperature range of 100–300 K has been revealed. A negative temperature expansion coefficient along the c axis was detected in the tetragonal modification Li0.37Ag0.63InSe2.
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