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The crystal structure of samarium octamolybdate is characterized by layers of cis-edge-sharing bi-face-capped octahedral Mo8 clusters parallel to the (bc) plane of the orthorhombic unit cell. The arrangement of the O atoms is derived from the close-packing layer sequence ABAC. The Mo—Mo distances range from 2.5959 (5) to 2.8413 (6) Å within the Mo8 clusters, with a mean value of 2.731 Å. The shortest Mo...Mo distance between the Mo8 clusters within the same layer is 3.0672 (5) Å, and between clusters of adjacent layers 3.6342 (5) Å. The Mo—O distances lie between 1.949 (3) and 2.163 (3) Å (mean value 2.050 Å). The Sm3+ ion lies away from the centre of a distorted cubocta­hedron with Sm...O distances ranging from 2.316 (4) to 3.159 (3) Å.

Supporting information

cif

Crystallographic Information File (CIF)
Contains datablocks smmo8, global

hkl

Structure factor file (CIF format)
Contains datablock smmo8

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