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Sections 12.1 – 12.2 Types of Solids Metallic Solids

Sections 12.1 – 12.2 Types of Solids Metallic Solids. Bill Vining SUNY Oneonta. In these sections… Types of Solids Unit Cells Cubic Unit Cells X-Ray Diffraction. Types of Solids and Metallic Solids. Types of Solids: Ionic Molecular Network: crystalline amorphous Metallic.

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Sections 12.1 – 12.2 Types of Solids Metallic Solids

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  1. Sections 12.1 – 12.2 Types of SolidsMetallic Solids Bill Vining SUNY Oneonta

  2. In these sections… Types of Solids Unit Cells Cubic Unit Cells X-Ray Diffraction Types of Solids and Metallic Solids

  3. Types of Solids: Ionic Molecular Network: crystalline amorphous Metallic Metallic Close-packed

  4. More Network Solids diamond Quartz: SiO2

  5. Find a unit cell:

  6. Counting Atoms in Unit Cells: Inside: 1 Face: ½ Edge: ¼ Corner: 1/8

  7. Unit Cells, Dimensions and Measurements: What percentage of a simple cubic unit cell is filled with atoms?

  8. Unit Cells, Dimensions and Measurements: U metal: Body centered cubic unit cell Unit cell edge = 343 pm What is the radius of a U atom?

  9. Face Centered Cubic Unit Cell = Cubic Closest Packed Structure

  10. Unit Cells, Dimensions and Measurements: Ca metal: Face centered cubic unit cell Density = 1.54 g/cm3 What is the radius of a Ca atom?

  11. What fraction of a simple cubic unit cell is filled with atoms? What fraction of a face-centered cubic unit cell is filled with atoms?

  12. X-Ray Diffraction: Determining the distance between planes of atomsX-rays and atomsOrders of diffractionBragg’s Law

  13. Silver metal crystallizes in an FCC lattice. Monochromatic x-radiation from a copper target has a wavelength of 154 pm. If this radiation is used in a diffraction experiment with a silver crystal, a second-order diffracted beam is observed at a theta value of 22.18°. If the spacing between these planes corresponds to the unit cell length (d = a), what is the d-spacing between the planes that gave rise to this reflection? What is the metallic radius of a silver atom? Using X-Ray Diffraction: Bragg’s Law

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