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XRD patterns for the Li- and Ta-modified KNN materials (LKNNT) powders with compositions (a) L3.0Ty, (b) L3.5Ty and (c) L4.0Ty. The 001, 100, 002 and 200 peaks of the tetragonal phase were identified in (a) with the (T) letter, while the 110, 001, 220 and 002 peaks of the orthorhombic phase were also identified in (a) with the (O) letter. The peaks marked with asterisk in (b) were identified as belonging to the KLiNbO phase.
