3. Zinc Blende and Wurtzite (ZnS) a. What is the unit cell defined by the sulfide...
Paper overlay C C. Zinc Blende, ZnS Use the plastic black template marked phere on a metal get the pink sphere e firmly. Note that It takes a little patience to build this structure. Rather than placing a small pink sphere on rod, you are balancing it in one of the vacancies of the lattice. Have faith, if you get the nint in the correct location it will not fall out, the colorless spheres will hold it in place firmly....
Question 1: Crystal Lattices Hexagonal Close Packed (HCP) Cubic Close Packed (CCP) Sodium Chloride Zinc Blende Wurtzite a) Draw the structures of all close packing and ionic lattices above. b) Identify the presence of octahedral and tetrahedral holes between layers. How many of each type of "hole" surround each atom in the lattice? c) Identify the layers of each structure in the drawings. d) Write an account of close packed lattice structures. e) Note the similarities and differences between Hexagonal...
Using the unit cell for Zinc Blende (Figure 12.16), whatis the atom ratio of Zn to S Zinc blende (ZnS) O A 4:4 о с 3:5
2/3 correct answers are required for credit
Consider the insoluble compound zinc sulfide , ZnS. The zinc ion also forms a complex with hydroxide ions. Write a balanced net ionic equation to show why the solubility of ZnS (s) increases in the presence of hydroxide ions and calculate the equilibrium constant for this reaction. For Zn(OH)42. , K,-29x1015 . Use the pull-down boxes to specify states such as (aq) or (s). 1 1
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t). Và - H đi, dt 3H8 2009/01/06 Name: Student ID: (1) Write down the formula for the relationship between an atom's radius "r" und unit cell length "a" in (a) simple cubic (b) bodysentered cubic, and (c) face-centered cubie (9%) 11,67 ) (2) LiBr has a density of 3.464 g/em, rock salt structure, shown in Figure 1. The atomic weight of Li 6,941 and Br 79.904. Calculate (a) the molar...
3. A certain form of silver iodide adopts the zinc blende structure. The density of the salt is 5.69 g/cm. Calculate the length of a side of the unit cell. Calculate an approximate distance between the silver cations and iodide anions in the structure. (You can approximate the location of the silver ion because it resides in a pocket 4 of the way down the body diagonal.) 3
2. Calculate the atomic packing factor of the zinc blend (ZnS) crystal structure. The ZnS unit cell is shown below. (14 marks) The ionic radii of Zn?" and S. are 0.060 and 0.174 nm, respectively, On Os
1. Sketch the unit cell and calculate the density of BeO in gm/cm'. It has the zinc blende structure. What is the Coordination Number for the Beations What is the Coordination Number for the 02 ions 2. Sketch the unit cell and calculate the density of Si in gm/cm°. It has the diamond cubic structure What is the Coordination Number for the Si atoms?
Be rure to aswer all parts. Zine selenide (ZnSe) erystallizes in the rinc blende structure like ZnO (aee the figare belew) and has a deasity of 5.42 g/em o3 Zn2+ (a) How many Za and Se ions are in each unit cell? Zn ions Se ions (b) What is the mass of a unit cell? amu (c) What is the volume of a unit cell? Enter your answer in scientific notation. 3 cm x 10 (d) What is the edge...
Nanowires are high aspect-ratio metal or semiconducting wires with diameters on the order of 1 to 100 nanometers and typical lengths of 1 to 100 microns. Nanowires likely will be used in the future to create high-density electronic circuits. Nanowires can he fabricated from ZnO. ZnO has the wurtzite structure. The wurtzite structure is a hexagonal lattice with four atoms per lattice point at Zn (0, 0, 0), Zn (2/3, 1/3, 1/2), O (0, 0, 3/8), and O (2/3, 1/3,...