2. Crystal Structure

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crystal structure analysisX-ray sourcesx-rays used for diffraction are radiations withwavelengths 0.05 ~ 0.25 nma voltage of 35 kV is applied between cathode(W filament) and anode (Mo target)x-ray spectrum 0.2 ~ 1.4 nmwavelength of K α line 0.07 nm18
X-ray diffractionreflected wave patterns of beam are not in phase,no reinforced beam will be produceddestructive interference occursreflected wave patterns of beam are in phase,reinforcement of the beam or constructiveinterference occursnλ = MP + PN n = 1, 2, 3…..19nλ = 2 d hkl sinθ
Page 2: crystal systemonly 7 different type
Page 5 and 6: BCCFCCcoordination number = 8total
Page 7 and 8: the closest packingHCPa b a b a …
Page 9 and 10: directions are crystallographically
Page 11 and 12: ex. draw the following crystallogra
Page 13 and 14: hexagonal structureMiller-Bravais i
Page 15 and 16: volume, planar, linear densityvolum
Page 17: no. of atoms = ½ + 1 + ½ = 2 atom
Page 21 and 22: diffraction pattern for cubic unit
Page 23: BCC {110) and {200}sin 2 θ A h 2 A

2. Crystal Structure

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