Compounds Strukturbericht designation

The ternary variant TiNiSi type is also called E-phase structure. Many ternary compounds belonging to a MeTX formula (Me = rare earth metal, Ti, Hf, V, etc., T = transition metal of the Mn, Fe, Pt groups, X = Si, Ge, Sn, P, etc.) have this structure. Strukturbericht designation C23. 

Table D.9. Strukturbericht designations for binary compounds (AX type) ...

Table D.II.Strukturbericht designations for quaternary compounds (AjX or AXj type) ...

The structures of intermetallic phases are often designated in the literature by Strukturbericht and Pearson symbols instead of by the space group. The Strukturbericht method for classifying metallic structures consists of a capital letter followed by a number and a subscript. The A-series were supposed to be elemental structures (with an exception for A-15) the B-series, AB compounds the C-series, AB2 compounds, etc. The number and subscript following the letter designated the lattice. Examples are A1 for fee, A2 for bcc, Aa for bet, A3 for hep, A4 for diamond, etc., up to A20. For the AB binary systems, B1 is the NaCl structure, B2 is the CsCl structure, B3 is zinc blende, B4 is wurtzite, etc. up to B37. C designates the AB2 compoimds, D the A Bm compounds, etc. 

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