Synthesis and crystal chemistry of BaNd2Ti3O10, BaNd2Ti5O14, and Nd4Ti9O24 |
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Authors: | D Kolar S Gaberscek B Volavsek HS Parker RS Roth |
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Institution: | J. Stefan Institute, Ljubljana, Yugoslavia;National Bureau of Standards, Washington, D.C. 20234 USA |
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Abstract: | Two new ternary compounds BaNd2Ti3O10 (1:1:3) and BaNd2Ti5O14 (1:1:5) have been identified in the BaONd2O3TiO2 system. Single crystals of the compounds were grown and unit cell dimensions and space group symmetry were determined. BaNd2Ti3O10 is orthorhombic with a = 3.8655 ± 0.0003, b = 28.156 ± 0.003 and c = 7.6221 ± 0.0007 Å and possible space groups are Cmcm or Cmc2. The compound melts congruently at 1640 ± 20°C. BaNd2Ti5O14 is also orthorhombic with a = 22.346 ± 0.002, b = 12.201 ± 0.001 and c = 3.8404 ± 0.0003 Å and possible space groups are Pbam and Pba2. This compound melts congruently at 1540 ± 20°C. Single crystals of the binary compound Nd4Ti9O24 were also grown and found to be orthorhombic with a = 35.289 ± 0.003, b = 13.991 ± 0.001, c = 14.479 ± 0.001 Å, space group Fddd. |
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