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Abstract

Different degrees of similarity between inorganic crystal structures are defined concisely and examples are presented that illustrate their practical application. A notation giving the coordination of atoms is presented together with some basic rules for developing crystal-chemical formulae and the Bauverband description of inorganic structure types. Typical examples of the nomenclature are: pyrite $\textrm{Fe}^{[6o]}\{g\}[$ S₂^[(3;1)t]], $\mathbi{F}\boldmath{(}\square\boldmath{2}\mathbi{l}\boldmath{)} + F^{\prime}$ FeS₂ $Pa\bar{3}$ ; spinel Mg^[4]Al₂^[6]O₄, $_{\infty}^3[$ Mg^[4t]Al₂^[6o]O₄^[1,3;12co]], $\mathbi{F}^{\prime\prime\prime}_\mathbf{222} + D$ , $T^{\prime}$ MgAl₂O₄ $Fd\bar 3m$ .