Question

3.- The Perovskite structure (CaTiOs) can be described as an FCC packing of Ca2* and O2 ions on which Ti4+ occupies of the octahedral sites, located in the cube center. Data, ionic radii, r(Ca2+)-0.106 nm; r(0%)-0.132 nm; r(Ti4+)-0.036 nm; atomic mass, M(Ca)-40.08; M(O)-16.00; M(Ti)-47.90. Calculate: a) The volume of the unit cell b) The packing factor c) The linear density (ions/nm) in the direction [111] d) The planar density (ions/nm2) in the planes (111) and (200) e) The volumetric density expressed in g/cm3 (Solution: a) V-0.0381 nm, b) pfs 0.897; c) ρ[111]-3.43 ions/nm; d) ρ(111)-20.38 ions/nm, ρ(200)-2648 ions/nm-e) ρν-5.94 g/cm*)

Answer 1

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