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Figure 6
(a) Elastic modulus in the directions [{\bf e}_1^{\,\prime}] and [{\bf e}_2^{\,\prime}]. (b) Shear modulus and (c) Poisson's ratio in the directions 12 and 23 for silicon (311). The vector [{\bf{e}}_1^{\,\prime}] is fixed in the normal direction [311], and the vectors [{\bf e}_2^{\,\prime}] and [{\bf e}_3^{\,\prime}] are in the crystal plane (311). The angle α is between the vectors [{\bf e}_2^{\,\prime}] and [0 1 −1]/21/2 in the crystal plane: [{\bf e}_2^{\,\prime}](α=0°) = [0 1 −1]/21/2, [{\bf e}_2^{\,\prime}](α=90°) = [2 −3 −3]/(22)1/2.

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