chain geometry
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2020 ◽  
Vol 59 (8) ◽  
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Michael Böhme ◽  
Aleksej Jochim ◽  
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Günther J. Redhammer

The title compound, Ca3ZnGeO2[Ge4O12] (tricalcium zinc germanium dioxide dodecaoxidotetragermanate), adopts a taikanite-type structure. The tetrahedral [Ge4O12] chain geometry is very similar to that of the silicate chain of taikanite,i.e.BaSr2Mn3+2O2[Si4O12], while the major difference is found parallel to thecaxis. In taikanite, Mn3+octahedra form an infinite zigzag chain, whereas the title compound has a chain of distorted ZnO6octahedra, which alternates with distorted GeO4tetrahedra connected to each otherviatwo common edges. Eightfold-coordinated Ca2+polyhedra and ZnO6octahedra form a slab parallel to (001) which alternates with another slab containing the tetrahedrally coordinated Ge sites along thecaxis.


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Shaoyun Chen ◽  
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Vol 63 (3-4) ◽  
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Aneta Sulima
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