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Keywords:

  • cage compounds;
  • clathrates;
  • germanium;
  • inorganic synthesis;
  • structure elucidation
Thumbnail image of graphical abstract

Now they are 10! The title compound displays a new type of crystal structure and is labeled clathrate X according to the general classification of clathrate structures. In contrast to typical clathrates, this compound has three-coordinate atoms within the framework and combines distorted 24-vertex polyhedra (see picture, green) centered around tellurium guest atoms with very irregular 10-vertex polyhedra around sulfur atoms (yellow).