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Table 2 Values of ionic radii and theoretical value of lattice constant

From: Composition, Microstructure, and Electrical Properties Control of the Powders Synthesized by Sol–Gel Auto-Combustion Method Using Citric Acid as the Fuel

x

a exp, Å

a th, Å

rB, Å

rA, Å

r, Å

u, Å

0.0

8.330

8.208

0.640

0.626

0.633

0.2600

0.2

8.334

8.295

0.691

0.629

0.660

0.2604

0.4

8.335

8.305

0.742

0.604

0.673

0.2608

0.6

8.355

8.316

0.794

0.578

0.686

0.2612

0.8

8.361

8.327

0.845

0.553

0.699

0.2616

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