Figure 6
(a) Projections of the crystal structure of AgBi2B5O11 (left) and Bi3B5O12 (Filatov et al., 2004 ) (right) onto the bc plane in comparison to the pole figure of thermal expansion coefficients. (b) The portion of the crystal structures of AgBi2B5O11 (left) and Bi3B5O12 (Filatov et al., 2004 ) (right) onto the ac plane in comparison to the pole figure of thermal expansion coefficients. The O, Bi and Ag atoms are highlighted in red, violet and yellow, respectively. BO3 and BO4 groups are shown as grey triangles and tetrahedra, respectively. |