Powder Diffraction - Spallation Neutron Source
Powder Diffraction - Spallation Neutron Source
Powder Diffraction - Spallation Neutron Source
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Crystallite Size Broadening<br />
d*=constant<br />
See GSAS Manual, pp 158-167.<br />
GSAS fits crystallite broadening<br />
with two profile terms:<br />
• LX -> Lorentzian<br />
• GP -> Gaussian<br />
Relation between avg. size (p) and<br />
GSAS terms:<br />
p = 18000Kl<br />
pLX<br />
p = 18000Kl<br />
p GP<br />
K 1 (Scherrer constant, related to<br />
crystal shape)<br />
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