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18 Cards in this Set
- Front
- Back
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What are the 7 types of crystal structures? |
Simple Cubic, Tetragonal, Orthorhombic, Hexagonal, Rhombohedral, Monoclinic, Triclinic |
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What are the 4 lattice types? |
Simple, Face Centred, Body Centred, Base Centred |
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What are the total number of allowed nodes? (Relative to Quantum Numbers) |
Primary Quantum Number-1 |
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Why does the p-orbital split in energy levels? How many levels? How many electrons are in each state? |
The p-orbital splits because the spin can either interact positively or negatively with the angular momentum. There are 2 possible levels. 4 in one state and 2 in the other. |
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What is the bonding principle of covalent and ionic bonding. |
Electron cloud interacting for covalent. Electron transfer and ionic attraction for ionic bonding. |
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How does a hydrogen bond differ from a normal polar bond? |
Hydrogen bonds have a much higher polarity due to the electronegativity difference? |
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What is the principle of metallic bonding? |
Sea of delocalized electrons |
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The higher the miller indices, the ____________ the interplanar distance. The relationship is |
Smaller. 1/sqrt((h/a)^2+(k/b)^2+(l/c)^2) |
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What are epitaxial structures? |
One crystal film grown on a bulk crystal. |
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What is MBE? Explain how it works. |
Molecular Beam Epitaxy. (Several source crucibles are heated to evaporate the material. The vapour is released in a controlled matter to deposit on a source. (Thermal Evaporating works in a similar way but with only one material) |
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What is ion sputtering? |
Ion sputtering is bombarding the target sample with ions to coat with the ion. |
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What is CVD? How does it work? |
Chemical Vapour Deposition. A vacuum chamber is pumped with a gas, which grows on a seed in the chamber. |
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Is the anode the source material or being coated in electroplating? |
The source material? |
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If we want to cut a crystal along a certain plane, where should we cleave relative to the plane? |
Perpendicular to the plane |
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If 2 crystal fields have greater overlap, is the energy lower or higher? |
Lower |
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Why are only 14 Bravais structures possible if there are 7 crystal types and 4 lattice structures? |
Several structures are the same and thus degenerate |
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What is a quasicrystal |
5 sided symmetry, but NO translational symmetry |
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How many directions are textured crystals ordered in? |
One |
