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{
"metadata": {
"name": "",
"signature": "sha256:d811f941685df0c27130d7c823a224d6aa75e253b0c49d58341e9220ca07cdb5"
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"worksheets": [
{
"cells": [
{
"cell_type": "heading",
"level": 1,
"metadata": {},
"source": [
"Chapter16-Structure of Solids"
]
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex1-pg483"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 16.1\n",
"##calculation of density\n",
"\n",
"##given values\n",
"a=3.36*10**-10;##lattice constant in m\n",
"M=209.;##atomicmass of polonium in kg\n",
"N=6.02*10**26;##avogadro's number\n",
"z=1.;##no of atom\n",
"##calculation\n",
"d=z*M/(N*a**3)\n",
"\n",
"print'%s %.2f %s'%('density (in kg/m^3) is',d,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"density (in kg/m^3) is 9152.34 \n"
]
}
],
"prompt_number": 7
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex2-pg483"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 16.2\n",
"##calculation of no of atoms\n",
"\n",
"##given values\n",
"a=4.3*10**-10;##edge of unit cell in m\n",
"d=963.;##density in kg/m**3\n",
"M=23.;##atomicmass of sodium in kg\n",
"N=6.02*10**26;##avogadro's number\n",
"\n",
"##calculation\n",
"z=d*N*a**3./M;\n",
"\n",
"print'%s %.2f %s'%('no of atoms is',z,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"no of atoms is 2.00 \n"
]
}
],
"prompt_number": 3
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex3-pg483"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 16.3\n",
"##calculation of distance\n",
"\n",
"##given values\n",
"z=4.;##no of atoms in fcc\n",
"d=2180.;##density in kg/m**3\n",
"M=23+35.3;##atomicmass of sodium chloride in kg\n",
"N=6.02*10**26;##avogadro's number\n",
"\n",
"##calculation\n",
"a1=z*M/(N*d);\n",
"a=a1**(1/3.);\n",
"l=a/2.;##in m\n",
"\n",
"print'%s %.2f %s'%('distance between adjacent chlorine and sodium atoms in armstrong is',l*10**10,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"distance between adjacent chlorine and sodium atoms in armstrong is 2.81 \n"
]
}
],
"prompt_number": 4
},
{
"cell_type": "heading",
"level": 2,
"metadata": {},
"source": [
"Ex4-pg495"
]
},
{
"cell_type": "code",
"collapsed": false,
"input": [
"import math\n",
"##Example 16.4\n",
"##calculation of interatomic spacing\n",
"\n",
"##given values\n",
"alpha=30*math.pi/180.;##Bragg angle in degree\n",
"h=1;\n",
"k=1;\n",
"l=1;\n",
"m=1;##order of reflection\n",
"x=1.75*10**-10;##wavelength in m\n",
"\n",
"##calculation\n",
"d=m*x/(2.*math.sin(alpha));\n",
"a=d*math.sqrt(h**2+k**2+l**2.);##in m\n",
"\n",
"print'%s %.2f %s'%('interatomic spacing in armstrong is',a*10**10,'');\n"
],
"language": "python",
"metadata": {},
"outputs": [
{
"output_type": "stream",
"stream": "stdout",
"text": [
"interatomic spacing in armstrong is 3.03 \n"
]
}
],
"prompt_number": 6
}
],
"metadata": {}
}
]
}
|
