Statistical analysis of structural parameters of crystals with colquiriite
structure - LiMM'F-6- retrieved from the inorganic crystal structure databa
se, and from literature, has revealed strong correlations between some of t
hem. The type and degree of correlation is site- and constitution-dependent
. Therefore, except the total sample, some selected subsets of data are ana
lysed with only one variable ion occupying the given site. Structural param
eters are not equally sensitive to changes imposed by the change of the cry
stal constitution. The pairs of subsets with the general formulae LiSrM'F-6
and LiCaM'F-6, as well as LiMAlF6 and LiMGaF6, exhibit similar dependencie
s between structural parameters. The results, presented, can be used to pre
dict the changes of the structure while growing new crystals with colquirii
te structure. The results of principal component analysis clearly show that
the first factor explains most of the variation of structural data. It has
a geometric nature and correlates with the effective radii of the doping i
ons. (C) 2001 Elsevier Science B.V. All rights reserved.