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Journal Article

The indide Er2.30(1)Ni1.84(1)In0.70(1) – A new superstructure of the U3Si2 family


Lukachuk,  M.
Former Departments, Max Planck Institute for Solid State Research, Max Planck Society;

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Rodewald, U. C., Lukachuk, M., Heying, B., & Pöttgen, R. (2006). The indide Er2.30(1)Ni1.84(1)In0.70(1) – A new superstructure of the U3Si2 family. Monatshefte füt Chemie, 137(1), 7-13.

Cite as: https://hdl.handle.net/21.11116/0000-000F-0281-C
Single crystals of the indide Er-2.30(1) Ni-1.84(1) In-0.70(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, alpha = 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 (1) over bar). 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.