Gallium has an orthorhombic structure, with a0 0.45258 nm, b0 0.45186 nm and c0 = 0.76570 nm. The density is 5.904 g/cm3, and the atomic weigh is 69.72 g/mol. Determine: a- The number of atoms in each unit cell; b- The packing factor in the unit cell. %3D %3D %3D

Gallium has an orthorhombic structure, with a0 0.45258 nm, b0 0.45186 nm and c0 = 0.76570 nm. The density is 5.904 g/cm3, and the atomic weigh is 69.72 g/mol. Determine: a- The number of atoms in each unit cell; b- The packing factor in the unit cell. %3D %3D %3D

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Concept explainers

Crystal Lattices and Unit Cell

Consider a crystal. The regular and repeating pattern of constituent particles is the most distinguishing feature of crystalline solids. A crystal lattice is formed when these particles are replaced with representative points. The three-dimensional arrangement of constituent particles is known as a crystal lattice. Unit cell is that the smallest portion of a space lattice which when repeated in several directions, generate the whole lattice. Unit cell is a building block of a lattice. It is the smallest unit of cell.

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Crystal
aSIs on
very lattice point.
Crystal Structure Lattice + Basis
9- Gallium has an orthorhombic structure, with a0 0.45258 nm, b0 0.45186 nm,
and co =0.76570 nm. The density is 5.904 g/cm3, and the atomic weigh is 69.72
g/mol. Determine:
a- The number of atoms in each unit cell;
b- The packing factor in the unit cell.

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10-Calculate the number of vacancies per m3 for gold at 900 C. the energy for vacancy
formation is 0.86 eV/atom.
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