2023
DOI: 10.1002/zaac.202300109
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Laves phases: superstructures induced by coloring and distortions

Abstract: The structural chemistry of Laves phases, especially with respect to their superstructures induced by coloring and distortions is discussed. Starting from the three classical Laves phases MgCu2, MgZn2 and MgNi2, the more complex Komura phases are derived. Different possibilities of their description are summarized. In the second part, the superstructures are discussed based on their respective prototypes. The crystal chemical relationships are illustrated based on group‐subgroup descriptions using the Bärnigha… Show more

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Cited by 12 publications
(13 citation statements)
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“…More information about the structural chemistry of Laves phases can be found in a recent review article. 72 27 Al solid-state NMR investigations showed an intense central line originating from the |+1/2〉 ↔ |−1/2〉 transition which can be modelled with a Gauss-Lorentz fit. The resonance signal can be found at δ = 1091 ppm (Fig.…”
Section: Resultsmentioning
confidence: 99%
“…More information about the structural chemistry of Laves phases can be found in a recent review article. 72 27 Al solid-state NMR investigations showed an intense central line originating from the |+1/2〉 ↔ |−1/2〉 transition which can be modelled with a Gauss-Lorentz fit. The resonance signal can be found at δ = 1091 ppm (Fig.…”
Section: Resultsmentioning
confidence: 99%
“…19 Finally, also some aluminum representatives of the Yb 6 Ir 5 Ga 7 type structure 20 (P6 3 /mcm, superstructure of MgZn 2 ) could be synthesized and characterized by our group. 21 Based on these and other recent results, we summarized the structural and crystal chemistry of Laves phases 22 and the Mo 3 Al 2 C type compounds 23 with a special focus on superstructure formation and discussed the crystal-chemical peculiarities based on group−subgroup relations. During the search in the Pearson database, 24 it became clear that the majority of the binary MAl 2 phases adopts the cubic MgCu 2 type structure (M = Ca−Ba, Sc, Y, La−Nd, Sm−Lu, Th, U−Pu), 17,25−34 while the hexagonal MgZn 2 type is only realized for ZrAl 2 and HfAl 2 .…”
Section: ■ Introductionmentioning
confidence: 91%
“…The crystal chemical details of Laves phase superstructures have recently been reviewed. 77 Several aluminides were reported as equiatomic compounds, and the MgZn 2 type (space group P6 3 /mmc) was assigned. 13 Meanwhile, it is known that an equiatomic composition with complete atom ordering is not possible.…”
Section: ■ Selected Crystal Structuresmentioning
confidence: 99%
“…YbCu 4 In shows 1:1 Yb/In ordering and crystallizes with the noncentrosymmetric MgCu 4 Sn type (space group F 3 m ). The crystal chemical details of Laves phase superstructures have recently been reviewed . Several aluminides were reported as equiatomic compounds, and the MgZn 2 type (space group P 6 3 / mmc ) was assigned .…”
Section: Selected Crystal Structuresmentioning
confidence: 99%