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The Indide Er2.30(1)Ni1.84(1)In0.70(1) – A New Superstructure of the U3Si2 Family

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Summary.

Single crystals of the indide Er2.30(1)Ni1.84(1)In0.70(1) were isolated from an arc-melted sample of the initial composition 5Er:2Ni:1In. Er2.30Ni1.84In0.70 crystallizes with a new superstructure of the Mo2FeB2 type: P4/m, a = 738.6(2), c = 361.4(1) pm, wR2 = 0.0393, 487 F 2 values, 22 variables, BASF = 0.500(3) (meroedric twin matrix 010 100 00\(\bar(1)\)). The structure may be described as an intergrowth variant of slightly distorted AlB2 and CsCl related slabs. Formation of the superstructure results in two crystallographically independent sites 1a and 1c that center the CsCl slab. These sites have different size and they are occupied by 90% In + 10% Er (1c) and 51% In + 49% Er (1a), respectively. The crystal chemical consequences are discussed on the basis of a group-subgroup scheme.

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Authors and Affiliations

  1. Institut für Anorganische und Analytische Chemie and NRW Graduate School of Chemistry, Westfälische Wilhelms-Universität Münster, 48149, Münster, Germany

    Ute Ch. Rodewald, Mar’yana Lukachuk, Birgit Heying & Rainer Pöttgen

  2. Max-Plank-Institut für Festkörperforschung, 70569, Stuttgart, Germany

    Mar’yana Lukachuk

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  1. Ute Ch. Rodewald
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  2. Mar’yana Lukachuk
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  3. Birgit Heying
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  4. Rainer Pöttgen
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Correspondence to Rainer Pöttgen.

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Rodewald, U., Lukachuk, M., Heying, B. et al. The Indide Er2.30(1)Ni1.84(1)In0.70(1) – A New Superstructure of the U3Si2 Family. Monatsh. Chem. 137, 7–13 (2006). https://doi.org/10.1007/s00706-005-0409-5

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  • DOI: https://doi.org/10.1007/s00706-005-0409-5

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