Homework Answers
In each diagram cations i.e., Na+ and Mg+2 which are samller in size are at the edges and each is shared by 4 unit cells.
Anions Cl- and O-2 which are larger in size are at the corners and faces. At corners they are shared by 8 unit cells and at faces they are shared by two atomic cells
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10 points. Identify all atomic positions in each structure. NaCl (rock salt) Mgo
NaCl has a rock salt crystal structure with a unit cell edge length of 0.56 nm....
NaCl has a rock salt crystal structure with a unit cell edge length of 0.56 nm. The atomic weights of the Na and Cl are 23 and 35.5 g/mol, respectively, and the Avogadro's number is 6.022 x 10“ formula units/mol. (a) Draw a unit cell to show the crystal structure of the NaCl. (b) What is the coordination number of the atoms in this structure? (c) How many Na atoms and Cl atoms in one unit-cell of such a structure?...
1. In rock-salt phases, cations are more mobile than the anions. (19/22 pts) a) For the 2D slices...
1. In rock-salt phases, cations are more mobile than the anions. (19/22 pts) a) For the 2D slices of the rock salt structure shown below, sketch and identify the 2 types of intrinsic point defects possible for pure rock salt phases. (5 pts) b) What effect, if any, do you expect an increase in temperature to have on the conductivity and c) Consider rock salt phases with composition MgO, NaF and NaCl. Which of these do you expect d) Small...
as soon as possible uestion 2: (16 points) agnesium oxide (Mg0) has the rock salt crystal...
as soon as possible
uestion 2: (16 points) agnesium oxide (Mg0) has the rock salt crystal structure and a ensity of 3.58 g/cm2. The atomic weights of magnesium doxygen are 24.31 g/mol and 16.00 g/mol, respectively. Using the information above, determine the unit cell edge length. etermine the unit cell edge length from the radii in the table below assuming that ns just touch each other along the edges. Ionic Radius (nm) Ionic Radius (nm) Anion Cation Mg2 Fe2 Na...
An AX ceramic that has a NaCl crystal structure, i.e., a face-centered cubic crystal structure with all of its octahedral sites filled with cations. What is the atomic packing factor of this AX cryst...
An AX ceramic that has a NaCl crystal structure, i.e., a face-centered cubic crystal structure with all of its octahedral sites filled with cations. What is the atomic packing factor of this AX crystal structure, assuming that the interstitial cations fit perfectly into each octahedral site?
An AX ceramic that has a NaCl crystal structure, i.e., a face-centered cubic crystal structure with all of its octahedral sites filled with cations. What is the atomic packing factor of this AX crystal...
The crystal lattice and lattice parameters of sodium chloride (NaCl) salt are given below. a =...
The crystal lattice and lattice parameters of sodium chloride (NaCl) salt are given below. a = b = c = 2.8 A, a=B=y=90° Atomic radii (in A): Ina -1.80 and rc -1.00 Ionic radii (in A): Na+ = 1.13 and Ta-- 1.67 (a) Identify the lattice points and unit cell of NaCl. (3 marks) (b) Name the Bravais lattice of NaCl. (1 mark) (c) Determine the density (ing cm) of Naci. (3 marks) (d) Determine the atomic packing factor of...
Calculate the theoretical density of Mns, given that it has the rock salt crystal structure. You...
Calculate the theoretical density of Mns, given that it has the rock salt crystal structure. You may want to use the table below. The atomic weights for Mn and S are 54.94 g/mol and 32.06 g/mol, respectively. Cation Fe2+ Ni2+ Mg2+ Ionic Radius (nm) Anion Ionic Radius (nm) 0.077 0.140 0.069 S2- 0.184 0.072 0.067 Mn2+ p= g/cm3 the tolerance is +/-2%
Q. 3. Potassium fluoride adopts the rock salt (NaCl type) structure, with a density of 2.48...
Q. 3. Potassium fluoride adopts the rock salt (NaCl type) structure, with a density of 2.48 g/cm3. Using the data for the Part 4 model you constructed, calculate the expected distance between the center of the potassium ion and the center of an adjacent fluoride ion in pm. Q. 4. The diameter of a Cs+ ion is 334 pm; the diameter of a Br- ion is 392 pm. For CsBr, which crystallizes in the CsCl type structure from Part 5,...
Please show full work while solving The following compounds all display the NaCl structure. (i.e. They...
Please show full work while solving
The following compounds all display the NaCl structure. (i.e. They are isomorphous.) For each pair, indicate which would have the lattice energy of lesser magnitude. ROCI OKCI Sro Mgo CBao CSF Mgo Mgs Case Cas Consider how the relative energies of interaction of "point" charges would vary with respect to the expected interionic distances, according to Coulomb's Law. (Detailed calculations should NOT be required to make these comparisons -- but consider, for example, the...
Be sure to answer all parts. Draw the structure of each ammonium salt. Be sure to...
Be sure to answer all parts. Draw the structure of each ammonium salt. Be sure to include ion charges. triethylammonium iodide edit structure ...
3. (6 points) Use principles of atomic structure and/or chemical bonding to answer each of the...
3. (6 points) Use principles of atomic structure and/or chemical bonding to answer each of the following. a. The radius of the Ca atom is 0.197 nm; the radius of the Ca ion is 0.099 nm. Account for this difference. b. The lattice energy of CaO(s) is -3,460 kJ/mol; the lattice energy for K2O(s) is -2,240 kJ/mol. Account for this difference.
NaCl has a rock salt crystal structure with a unit cell edge length of 0.56 nm. The atomic weights of the Na and Cl are 23 and 35.5 g/mol, respectively, and the Avogadro's number is 6.022 x 10“ formula units/mol. (a) Draw a unit cell to show the crystal structure of the NaCl. (b) What is the coordination number of the atoms in this structure? (c) How many Na atoms and Cl atoms in one unit-cell of such a structure?...
1. In rock-salt phases, cations are more mobile than the anions. (19/22 pts) a) For the 2D slices of the rock salt structure shown below, sketch and identify the 2 types of intrinsic point defects possible for pure rock salt phases. (5 pts) b) What effect, if any, do you expect an increase in temperature to have on the conductivity and c) Consider rock salt phases with composition MgO, NaF and NaCl. Which of these do you expect d) Small...
as soon as possible
uestion 2: (16 points) agnesium oxide (Mg0) has the rock salt crystal structure and a ensity of 3.58 g/cm2. The atomic weights of magnesium doxygen are 24.31 g/mol and 16.00 g/mol, respectively. Using the information above, determine the unit cell edge length. etermine the unit cell edge length from the radii in the table below assuming that ns just touch each other along the edges. Ionic Radius (nm) Ionic Radius (nm) Anion Cation Mg2 Fe2 Na...
An AX ceramic that has a NaCl crystal structure, i.e., a face-centered cubic crystal structure with all of its octahedral sites filled with cations. What is the atomic packing factor of this AX crystal structure, assuming that the interstitial cations fit perfectly into each octahedral site?
An AX ceramic that has a NaCl crystal structure, i.e., a face-centered cubic crystal structure with all of its octahedral sites filled with cations. What is the atomic packing factor of this AX crystal...
The crystal lattice and lattice parameters of sodium chloride (NaCl) salt are given below. a = b = c = 2.8 A, a=B=y=90° Atomic radii (in A): Ina -1.80 and rc -1.00 Ionic radii (in A): Na+ = 1.13 and Ta-- 1.67 (a) Identify the lattice points and unit cell of NaCl. (3 marks) (b) Name the Bravais lattice of NaCl. (1 mark) (c) Determine the density (ing cm) of Naci. (3 marks) (d) Determine the atomic packing factor of...
Calculate the theoretical density of Mns, given that it has the rock salt crystal structure. You may want to use the table below. The atomic weights for Mn and S are 54.94 g/mol and 32.06 g/mol, respectively. Cation Fe2+ Ni2+ Mg2+ Ionic Radius (nm) Anion Ionic Radius (nm) 0.077 0.140 0.069 S2- 0.184 0.072 0.067 Mn2+ p= g/cm3 the tolerance is +/-2%
Please show full work while solving
The following compounds all display the NaCl structure. (i.e. They are isomorphous.) For each pair, indicate which would have the lattice energy of lesser magnitude. ROCI OKCI Sro Mgo CBao CSF Mgo Mgs Case Cas Consider how the relative energies of interaction of "point" charges would vary with respect to the expected interionic distances, according to Coulomb's Law. (Detailed calculations should NOT be required to make these comparisons -- but consider, for example, the...
Be sure to answer all parts. Draw the structure of each ammonium salt. Be sure to include ion charges. triethylammonium iodide edit structure ...
3. (6 points) Use principles of atomic structure and/or chemical bonding to answer each of the following. a. The radius of the Ca atom is 0.197 nm; the radius of the Ca ion is 0.099 nm. Account for this difference. b. The lattice energy of CaO(s) is -3,460 kJ/mol; the lattice energy for K2O(s) is -2,240 kJ/mol. Account for this difference.
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