Material chemistry Problem 2.4. The tetragonal crystal system allows for 2 Bravais lattices, a simple tetragonal (P)

Material chemistry

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Problem 2.4. The tetragonal crystal system allows for 2 Bravais lattices, a simple tetragonal (P) and a body-centered tetragonal (I). Show by simple geometrical construction that a face-centered tetragonal lattice is not a unique Bravais lattice and identify the actual Bravais lattice for this face- centered tetragonal lattice. Problem 2.5. The unit cell of the high temperature form of cristobolite, a form of quartz with the composition SiO2, is illustrated below. Identify the Bravais lattice, the basis, and the number of SiO₂ units per unit cell. Si4+ 02- Problem 2.4. The tetragonal crystal system allows for 2 Bravais lattices, a simple tetragonal (P) and a body-centered tetragonal (I). Show by simple geometrical construction that a face-centered tetragonal lattice is not a unique Bravais lattice and identify the actual Bravais lattice for this face- centered tetragonal lattice. Problem 2.5. The unit cell of the high temperature form of cristobolite, a form of quartz with the composition SiO2, is illustrated below. Identify the Bravais lattice, the basis, and the number of SiO₂ units per unit cell. Si4+ 02-

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Answer 24 A tetragonal crystal system has a defining symmetry of a single fourfold rotation axis A f... View the full answer