a) With the aid of a sketch, state the main components and show their arrangement in a powder X- ray diffractometer. With reference to the basic geometry of the instrument, explain how a diffraction pattern is produced from a powdered sample. Why is monochromatic radiation used?
a) With the aid of a sketch, state the main components and show their arrangement in a powder X- ray diffractometer. With reference to the basic geometry of the instrument, explain how a diffraction pattern is produced from a powdered sample. Why is monochromatic radiation used?
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C1
Transcribed Image Text:9):
The XRD pattern obtained for caesium chloride (CSCI) using a powder diffractometer with CuKa
radiation (2 0.1542 nm) is given below along with the diffraction angles of the peaks. It is known
that CSCI belongs to the cubic crystal system and the peaks in the XRD pattern have been identified
(indexed).
Courts
20
21.55°
30.69°
37.86°
43.98°
Peak
(001)
(011)
(111)
(002)
2000 -
1500
1000
500
20
30
Diffraction Angle 20
a) With the aid of a sketch, state the main components and show their arrangement in a powder X-
ray diffractometer. With reference to the basic geometry of the instrument, explain how a
diffraction pattern is produced from a powdered sample. Why is monochromatic radiation
used?
200
111
L00
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