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### Engineering materials

1. ENGINEERING MATERIALS DR. ANEELA WAKEEL
2. Atomic mass Cu=63.5g/mol
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4. CRYSTALLINE STRUCTURE 10
5. 11 Axial length are represented by a, b, c. Interaxial angles are α, β, γ.
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10. FCC=12
11. COORDINATION NUMBER Number of nearest neighbours or touching atoms around an atom 17 Coordination number (SC)=6 BCC=8 FCC=12 The primitive, body-centred and face-centred cubic unit cells.mp4
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15. CRYSTAL STRUCTURE CHARACTERISTICS 24
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20. 29 Determine the density of BCC iron, which has a lattice parameter of 0.2866 nm. Example 3.4 SOLUTION Atoms/cell = 2, a0 = 0.2866 nm = 2.866  10-8 cm Atomic mass = 55.847 g/mol Volume of unit cell = = (2.866  10-8 cm)3 = 23.54  10-24 cm3/cell Avogadro’s number NA = 6.02  1023 atoms/mol 3 0 a 3 23 24 / 882 . 7 ) 10 02 . 6 )( 10 54 . 23 ( ) 847 . 55 )( 2 ( number) s adro' cell)(Avog unit of (volume iron) of mass )(atomic atoms/cell of (number Density cm g =   = = −  
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33. MILLER INDICES 42
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46. DRAW PLANE FROM MILLER INDICES 55