Nuclear quadrupole resonance line spectra were analyzed in terms-of the loc
al structural order for a variety of inhomogeneities in solids. The applica
tion of the results of our analysis to a few different types of disorder se
lected from previous NQR studies helps give general. insights for the under
standing of the local properties of disorder in solids. The characteristics
of the line spectra being specific to the molecular mixed solutions could
be well understood by carrying out the spectral analyses in conjunction wit
h the systematic classification of the local field inhomogeneity according
to the structural isomorphism or heteromorphism.