Sloved Homwork-01
)HOME WORK (1 ﯾﺠﺐ ﻣﻼء ﻛﺎﻓﺔ ﻣﻌﻠﻮﻣﺎت اﻟﻄﺎﻟﺐ ﺑﺪﻗﺔ و ﺑﻮﺿﻮح و ﺑﺎﻻﺳﻢ اﻟﺜﻼﺛﻲ و ﻓﻲ ﺣﺎﻟﺔ ﻋﺪم اﻛﺘﻤﺎل ﻣﻌﻠﻮﻣﺎت اﻟﻄﺎﻟﺐ أو ﻋﺪم وﺿﻮﺣﮭﺎ ﺗﺨﺼﻢ اﻟﺪرﺟﺔ اﺳﻢ اﻟﻄﺎﻟﺐ: .................................................................................................................. اﻟﺮﻗﻢ اﻟﺠﺎﻣﻌﻲ: ................................................ رﻗﻢ اﻟﻤﺠﻤﻮﻋﺔ اﻟﻨﻈﺮﯾﺔ: ........ اﺳﻢ اﻟﻄﺎﻟﺐ: .................................................................................................................. اﻟﺮﻗﻢ اﻟﺠﺎﻣﻌﻲ: ................................................ رﻗﻢ اﻟﻤﺠﻤﻮﻋﺔ اﻟﻨﻈﺮﯾﺔ: ........ اﺳﻢ اﻟﻄﺎﻟﺐ: .................................................................................................................. اﻟﺮﻗﻢ اﻟﺠﺎﻣﻌﻲ: ................................................ رﻗﻢ اﻟﻤﺠﻤﻮﻋﺔ اﻟﻨﻈﺮﯾﺔ: ........ اﺳﻢ اﻟﻄﺎﻟﺐ: .................................................................................................................. اﻟﺮﻗﻢ اﻟﺠﺎﻣﻌﻲ: ................................................ رﻗﻢ اﻟﻤﺠﻤﻮﻋﺔ اﻟﻨﻈﺮﯾﺔ: ........ ﺗﻌﻠﯿﻤﺎت: -1ﯾﺘﻢ ﺣﻞ ﻛﻞ ﺳﺆال ﻓﻲ ورﻗﺔ ﻣﻨﻔﺼﻠﺔ -2ﯾﺘﻢ ﺗﺪﺑﯿﺲ أوراق اﻟﺤﻞ و ووﺿﻊ ھﺬه اﻟﻮرﻗﺔ ﻛﻐﻼف ﻟﻠﺤﻠﻮل ﻣﻊ اﻟﺘﺄﻛﺪ ﻣﻦ ﻣﻼء اﻟﺒﯿﺎﻧﺎت -3أﺧﺮ ﻣﯿﻌﺎد ﻟﺘﺴﻠﯿﻢ ھﺬا اﻟـ Homeworkھﻮ ﺗﺎرﯾﺦ ﯾﻮم اﻟﺨﻤﯿﺲ 1434/5/12 Page 1 Home Work 1 (1) Show for the body-centered cubic crystal structure that the unit cell edge length a and the atomic radius r are related through a BCC = 4 r 3 (2) If the atomic radius of lead is 0.175 nm, calculate the volume of its unit cell in cubic meters. Home Work 1 Page 2 (3) Show that the atomic packing factor (APF) for BCC is 68%. Home Work 1 Page 3 (4) Calculate the radius of a palladium atom, given that Pd has an FCC crystal structure, a density of 12.0 g/cm3, and an atomic weight of 106.4 g/mol ……………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………… Home Work 1 Page 4 (5) Beryllium (Be) has CPH unit cell crystal structure for which the ratio of the lattice parameters is 1.568. If the radius of the Be atom is 1.143 Å, it is required to: (a) determine the unit cell volume; and (b) calculate the theoretical density of Be and compare it with the literature (actual) value. Find the Be atomic weight from periodical table. You may try to search about literature value in the text book or through the internet Home Work 1 Page 5 (6) Within a cubic unit cell, sketch the following directions: Home Work 1 Page 6 (7) Determine the indices for the directions shown in the following cubic unit cell: …… Home Work 1 Page 7 (8) Sketch within a cubic unit cell the following planes: (9) Determine the Miller indices for the planes shown in the following unit cells: … Home Work 1 Page 8 (10) Calculate linear density for FCC [100] and [111] directions. … Home Work 1 Page 9 (11) Calculate linear density expressions for BCC [110] and [111] directions. Home Work 1 Page 10 (12) Calculate planar density expressions for FCC (100) and (111) planes. Home Work 1 Page 11 (13) Calculate planar density expressions for BCC (100) and (110) planes. Home Work 1 Page 12 (14) The metal rhodium has an FCC crystal structure. If the angle of diffraction for the (311) set of planes occurs at 38° (first-order reflection) when monochromatic x-radiation having a wavelength of 0.0711 nm is used, compute: (a) the interplanar spacing for this set of planes, and (b) the atomic radius for a rhodium atom. Home Work 1 Page 13 (15) X-ray diffraction analysis experiment of the first order is performed for an FCC element, calculate the incidence angle (θ) of the diffraction X-ray beam that will indicate plane (100). Given that the available X-ray wavelength λ = 4.0 Å, element atomic weight and density are 26.9 g/mol and 2.6 g/cm3, respectively. Home Work 1 Page 14 (16) The metal niobium has a BCC crystal structure. If the angle of diffraction for the (211) set of planes occurs at 76° (first-order reflection) 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 Home Work 1 Page 15
© Copyright 2024