Question: SrTiO3 has the perovskite structure, a = 3.905Å. Calculate..... (a) Ti-O distance (b) Sr-O distance (c) describe the coordination environment of O (d) calculate the density of SrTiO3 (e) what is the lattice type (f) is the structure close packed?

(b) What is the coordination environment of (i) Sr, (ii) Ti, (111) O. (c) Calculate the Sr-O and Ti-O bond lengths. Calculate the density of (d) Is the structure close packed? If so, describe it. What is the lattice type (e) What compositional modifications may be made to SrTiO3 in an a tricity. (ii) superconductivity, (iii) ionic conductivity. .

5. (1.29) SrTiOz has the cubic perovskite structure, a = 3.91 Å, with atomic coordinates: Sr: 1/2 1/2 1/2, Ti: 0 0 0, 0:1/20 0,0 1/2 0,0 0 1/2. (a) Draw a projection of the structure on the x-z plane. (b) What is the coordination environment of (i) Sr, (ii) Ti, (iii) O. (c) Calculate the Sr-O and Ti-O bond lengths. Calculate the density of SrTiO3.

The crystal structure of SrTiO3 is cubic, with a unit cell edge a = 3.90 Å. Calculate the expected 2θ positions of the first three peaks in the diffraction pattern which correspond to the planes (100), (110), (111) if the radiation is Cu Kα(λ= 1.54 Å).

SrTiO3 The structure factor represents the scattering of x-rays from the periodic arrangement of atoms within a particular crystal structure. Using the atomic positions for the atoms within the unit cell, you can calculate the (hkl) planes will result in constructive interference conditions from the lattice and their relative intensities.

Q4: (25') (Lecture 6) (1) SrTiO3 is an insulator with a bandgap of 3.1 eV. By replacing Srl+ with Lalt, La SrTiO3 becomes metallic. Your colleague has a La Sri- TiO3 thin film, but does not know the doping ratio (x). By doing transport measurements, the resistivity at room temperature is p=1000uQ.cm and the mobility is p=10cm’V's-!.

1.) a) Strontium Titanate (SrTiO3) has a simple cubic lattice with Ti at 0,0,0; Sr* at %% Y; and 0% at 1,0,0; 0,4,0; and 0,0,%. Is this material likely to show piezo- electricity? Explain why or why not. b) Germanium has the diamond cubic structure: an FCC lattice with atoms at 0,0,0 and %,/,/. Is this material likely to show piezo-electricity?

(1) Strontium titanate, SrTiO3 crystallizes in a cubic structure with Sr at the corners of the cube, Ti in the middle of the cube, and O atoms in the centers of all its faces. (a) Draw the crystal structure defining a suitable lattice and basis, defining the position of each atom (b) what is the intensity relationship between the first four Bragg

The unit cell of strontium titanate SrTiO3 is depicted on the left in the figure below showing the crystal structure as confirmed by X-ray diffraction experiments. The lattice constant is a=3.9×10−10 m. A typical X-ray powder diffraction spectrum is displayed on the right. The wave length of the X-ray beam (Cu-Ka radiation) is λ=1.54×10− ...

Question: calculate the structure factor of the perovskite SrTiO3 shown at the right. Note the atomic form factor for the elements are Sr2- 18.1, Ti4- 19.5, O 4.1 Sr2 ·-Tin 0