cubic structure with the position of the Cs+ ion at (1/2 1/2 1/2) and the position of the CI- ion at (0 0 0). The following are the physical data of CsCl density CsCl=3.97x10^6 g/m: ionic radius Cs+=0.169 nm; Cl ion radius=0.181 nm; atomic mass of Cs=132.90 g/mol; atomic mass of Cl = 35.45 g/mol a. Draw the CsCI crystal structure, determine the CsCI Bravais lattice, calculate the lattice parameters from the ion radius data and from the density data, calculate the CSCI crystal packing factor b. In the CsCl structure, the ratio of the positive ion radius, r+ to the negative ion radius, r- has a certain minimum value so that positive ions can occupy the space between eight (8) negative ions. Calculate the minimum value of the r+/r- ratio.
cubic structure with the position of the Cs+ ion at (1/2 1/2 1/2) and the position of the CI- ion at (0 0 0). The following are the physical data of CsCl density CsCl=3.97x10^6 g/m: ionic radius Cs+=0.169 nm; Cl ion radius=0.181 nm; atomic mass of Cs=132.90 g/mol; atomic mass of Cl = 35.45 g/mol a. Draw the CsCI crystal structure, determine the CsCI Bravais lattice, calculate the lattice parameters from the ion radius data and from the density data, calculate the CSCI crystal packing factor b. In the CsCl structure, the ratio of the positive ion radius, r+ to the negative ion radius, r- has a certain minimum value so that positive ions can occupy the space between eight (8) negative ions. Calculate the minimum value of the r+/r- ratio.
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Chapter1: Chemical Foundations
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Transcribed Image Text:Caesium Chloride (CsCI) crystals have a
cubic structure with the position of the Cs+
ion at (1/2 1/2 1/2) and the position of the
CI- ion at (0 0 0). The following are the
physical data of CsCl density
CsCl=3.97x10^6 g/m:
ionic radius Cs+=0.169 nm;
Cl ion radius30.181 nm; atomic mass of
Cs=132.90 g/mol; atomic mass of Cl = 35.45
g/mol
a. Draw the CsCI crystal structure, determine
the CSCI Bravais lattice, calculate the lattice
parameters from the ion radius data and
from the density data, calculate the CsCI
crystal packing factor
b. In the CsCl structure, the ratio of the
positive ion radius, r+ to the negative ion
radius, r- has a certain minimum value so
that positive ions can occupy the space
between eight (8) negative ions. Calculate
the minimum value of the r+/r- ratio.
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