A p–type materialis electrically
The number of tetrahedral voids in the unit cell of a face centred cubic lattice of similar atoms is |
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In a triclinic crystal: |
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A solid compound contains X, Y and Z atoms in a cubic lattice with X atoms occupying the corners, Y atoms in the body centred position and Z atoms at the centres of faces of the unit cell. What is the empirical formula of the compound? |
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The fraction of total volume occupied by the atoms present in a simple cube is |
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Percentage of free space in cubic close packed structure and in body centred packed structure are respectively |
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The efficiency of packing is 68% in |
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A substance AxBy crystallizes in a face centred cubic (fcc) lattice in which atoms 'a' occupy each corner of the cube and atoms ‘B’ occupy the centres of each face of the cube. Identify the correct composition of the substance AxBy: |
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Which one of the following compound exhibits both Schottky and Frenkel defects? |
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AB is an ionic solid. If the ratio of ionic radii of A+and B– is 0.52. What is the coordination number of B–? |
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For a crystal, the angle of diffraction (2θ) is 90° and the second order line has a d value of 2.28Å. The wavelength (in Å) of X–rays usedfor Bragg's diffraction is |
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