2. Calculate the planar atomic density in atoms per square millimeter for thefollowing crystal planes in FCC copper, which has a lattice constant of0.36147 nm.(a)(100)(b)(110)(c)(111)

For (111) plane:Because one cube does not cover 30 degrees, then 3 cubes do not cover 240 degrees,…

Answered: 2. Calculate the planar atomic density…

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter22: Inorganic Materials

Section: Chapter Questions

Problem 44AP

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3.49
The angle of diffraction of (220) set of planes for an FCC element occurs at 69.22° when monochromatic x-radiation having a wavelength of 0.1542 nm is used. (a) Calculate the atomic radius of the element; (b) Calculate the angle of diffraction from the set of planes (310).
44
1. The co-ordination number of metal crystallizing in a hexagonal close packed structure is (a) 12 (b) 4 (c) 8 (d) 6
The metal MIhas an FCC crystal structure. If the angle of diffraction for the (220) set of planes occurs at 69.22°(first-order reflection) when monochromatic x-radiation having a wavelength of 0.1542 nm is used, compute (a) the interplanar spacing for this set of planes,(b) the lattice parameter (the cubic edge length)a, (c) atomic radius for aMIatom.
Predict the structure of each of the following silicate minerals (network, sheets, double chains, and so forth). Give the oxidation state of each atom.(a) Apophyllite, KCa4(Si8O20)F ? 8 H2O(b) Rhodonite, CaMn4(Si5O15)(c) Margarite, CaAl2(Al2Si2O10)(OH)2
-The metal niobium has a BCC crystal structure. If the angle of diffraction for the (211) set of planes occurs at 75.99° when monochromatic x-radiation having a wavelength of 0.1659 nm is used, compute (a) the interplanar spacing for this set of planes, and (b) the atomic radius for the niobium atom.
Most ceramic materials have low thermal conductivities because(a) Electron mobility is strongly restricted due to their strong ionic-covalent bonding.(b) False, in general they are excellent thermal conductors (they are used in ovens).(c) Electron mobility is dependent on T and therefore they are poor conductors at high temperatures.(d) Electron mobility is highly restricted by secondary bonds.
2. Answer ALL parts a) - c). Sodium ([Ne] 3s¹3pº) forms a simple cubic (sc) primitive crystal structure, in which Na atoms are arranged at the corners of a cube. a) How many atoms are contained in the unit cell, and how many valence bands can be expected? b) Sketch the crystal orbitals at the special points Ã¯'(0,0,0), X(1/2,1/2,0), and M(1/2,1/2,1/2), and hence draw the corresponding band structure along T-X-M-T. c) With the aid of a diagram, explain how the band structure would change if the cube was distorted into a rhombohedron by elongation along a body diagonal?
Most ceramic materials have low thermal conductivities because:(a) Electron mobility is strongly restricted due to their strong ionic-covalent bonding.(b) False, in general they are excellent thermal conductors (they are used in ovens).(c) Electron mobility is dependent on T and therefore they are poor conductors at high temperatures.(d) Electron mobility is very restricted by secondary bonds.
Structure of the Bis-( dimethylglyoximato) nickel(II) ( write the C.N , geometry type):
Sketch the band structure of a Li AND a Si crystal. (ii) How would you expect the electrical conductivity in Li AND Si crystals to vary with temperature? (iii) Account for the fact that the conductivity of Si is enhanced by the addition of small amounts of B.

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2. Calculate the planar atomic density in atoms per square millimeter for the following crystal planes in FCC copper, which has a lattice constant of 0.36147 nm. (a) (100) (b) (110) (c) (111)