3. Figure below shows experimental powder diffraction patterns for ZnS (Zinc Blende),and CdS (Hexagonal) using Cu Ka radiation.a) Determine d-spacing for the following indexed reflections.ZnS: (111)(220)(311)CdS: (100) (002)(103)b) Estimate the unit cell parameters a and c based on question a).For cubic unit cell:1d²h² +k² +1²a²2=For Hexagonal unit cell:1 4,h² +hk+k²4Sin²0d²a²C²2²c) Estimate the averaged crystallite sizes for ZnS using its (111) peak.4 sin² 02²3-) +1²= Scherrer equation: t =Intensity (a.u.)3000- ZnS2000-1000-4000-2000--0Cds20ΚλB cos B(111)(002)(100)(200)(IOT), assume K=130(102)40(220)(311)tav(110)(103)[°2Theta](112)(004) (201)(200)(202)5060(400) (331)-(210)-(114)- (203)(211)70(105)

a) To determine d-spacing for the following indexed reflections: 1) (111), (220), (311) for ZnS 2)…

Answered: Figure below shows experimental powder…

Figure below shows experimental powder diffraction patterns for ZnS (Zinc Blende), nd CdS (Hexagonal) using Cu Ka radiation.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

3. Figure below shows experimental powder diffraction patterns for ZnS (Zinc Blende),
and CdS (Hexagonal) using Cu Ka radiation.
a) Determine d-spacing for the following indexed reflections.
ZnS: (111)(220)(311)
CdS: (100) (002)(103)
b) Estimate the unit cell parameters a and c based on question a).
For cubic unit cell:
1
d²
h² +k² +1²
a²
2
=
For Hexagonal unit cell:
1 4,h² +hk+k²
4Sin²0
d²
a²
C²
2²
c) Estimate the averaged crystallite sizes for ZnS using its (111) peak.
4 sin² 0
2²
3
-) +
1²
=

Scherrer equation: t =
Intensity (a.u.)
3000- ZnS
2000-
1000-
4000-
2000-
-0
Cds
20
Κλ
B cos B
(111)
(002)
(100)
(200)
(IOT)
, assume K=1
30
(102)
40
(220)
(311)
tav
(110)
(103)
[°2Theta]
(112)
(004) (201)
(200)
(202)
50
60
(400) (331)
-(210)
-(114)
- (203)
(211)
70
(105)

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