Post-Lab 1. Cesium chloride structure a Why is it not proper to say that CSCI has a body-centered cubic structure? b. Thallium (1) chloride crystallizes in the cesium chloride lattice, as shown in Fig. 5. The shortest distance between the center of a TI' ion and the center of a CI ion is 333 pm. 1) What is the length of the edge of a unit cell of TICI? Hint: How many TICI diameters equal one body diagonal? 2) What is the density in g/cm' of TICI?

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Chapter11: States Of Matter; Liquids And Solids
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Post-Lab
1. Cesium chloride structure
a. Why is it not proper to say that CSCI has a body-centered cubic structure?
b. Thallium (1) chloride crystallizes in the cesium chloride lattice, as shown in Fig. 5. The
shortest distance between the center of a TI' ion and the center of a CI ion is 333 pm.
1) What is the length of the edge of a unit cell of TICI? Hint: How many TICI diameters
equal one body diagonal?
2) What is the density in g/cm' of TICI?
2. Superconductors. Given the idealized unit cell for the structure of a superconductor shown
below to be orthorhombic, answer the following questions.
COPPR
a. How many copper atoms are there per unit cell? (Show calculations.)
b. What is the number of oxygens per unit cell? and Y? and Ba?
c. What is the formula for this superconductor?
d. The coppers in this unit cell occupy two different kinds of sites. Based on the number
of each of these types and the formula for the compound, what are the oxidation states for
copper in this compound?
The following Questions will likely require some research and reading outside of our
textbook! Go dig out the information that you need!
3.
a. What makes a substance a superconductor?
72
Transcribed Image Text:Post-Lab 1. Cesium chloride structure a. Why is it not proper to say that CSCI has a body-centered cubic structure? b. Thallium (1) chloride crystallizes in the cesium chloride lattice, as shown in Fig. 5. The shortest distance between the center of a TI' ion and the center of a CI ion is 333 pm. 1) What is the length of the edge of a unit cell of TICI? Hint: How many TICI diameters equal one body diagonal? 2) What is the density in g/cm' of TICI? 2. Superconductors. Given the idealized unit cell for the structure of a superconductor shown below to be orthorhombic, answer the following questions. COPPR a. How many copper atoms are there per unit cell? (Show calculations.) b. What is the number of oxygens per unit cell? and Y? and Ba? c. What is the formula for this superconductor? d. The coppers in this unit cell occupy two different kinds of sites. Based on the number of each of these types and the formula for the compound, what are the oxidation states for copper in this compound? The following Questions will likely require some research and reading outside of our textbook! Go dig out the information that you need! 3. a. What makes a substance a superconductor? 72
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