Synthesis and structure determination of AgScP2Se6, AgErP2Se6 and AgTmP2Se6 - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie Année : 2009

Synthesis and structure determination of AgScP2Se6, AgErP2Se6 and AgTmP2Se6

Arno Pfitzner
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Sabrina Turba
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Résumé

AgScP2Se6, AgErP2Se6 and AgTmP2Se6 were obtained by high temperature reaction of stoichiometric amounts of the elements in evacuated silica ampoules. They crystallize in the space-group P 1c, Z = 2, with the lattice constants a = 6.463 (1) Å, c = 13.349 (1) Å (AgScP2Se6), a = 6.578 (1) Å, c = 13.410 (2) Å (AgErP2Se6), and a = 6.567 (1) Å, c = 13.422 (1) Å (AgTmP2Se6). The crystal structures of AgScP2Se6 and AgErP2Se6 were refined from merohedrally twinned crystals. No twinning was observed for AgTmP2Se6. The crystal structures are isotypic and can be described as a variant of the CdI2 structure type. Thus, selenium atoms are hexagonally close packed. The octahedral voids of every second layer are occupied by Ag, M3+, and P2 dumbbells in an ordered fashion. The crystal structures are isotypic to AgScP2S6 and AgInP2S6.

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Dates et versions

hal-00482070 , version 1 (08-05-2010)

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Arno Pfitzner, S. Seidlmayer, Sabrina Turba. Synthesis and structure determination of AgScP2Se6, AgErP2Se6 and AgTmP2Se6. Journal of Inorganic and General Chemistry / Zeitschrift für anorganische und allgemeine Chemie, 2009, 635 (4-5), pp.704. ⟨10.1002/zaac.200900004⟩. ⟨hal-00482070⟩

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