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Orange red crystals of Na 2 ZrSe 3  were obtained by the reaction of Na 2 Se, Zr and Se at 800 °C. The new compound is monoclinic, s. g. C2/m with a = 6.952(2), b = 12.01(1), c = 7.257(2) Å, ß = 108.81(2)°, Z = 4. Its crystal structure was determined from single crystal diffractometer data (Mo-K α -radiation) and refined to a conventional R of 0.016. It is characterized by layers based on a distorted ccp packing of Se-atoms where all metal atoms occupy octahedral voids in an ordered fashion. Zr atoms are located on the nodes of a 6 3 -net forming CrCl 3  type selenozirconate layer (d(Zr-Se) = 2.702 Å).

Na 2 ZrSe 3 , ein neues Chalcogenometallat(IV) mit Schichtstruktur/Na 2 ZrSe 3 , a New Chalcogenometallate(IV) with a Layered Structure