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- W4241024172 abstract "Die silbrig bis dunkelmetallisch glänzenden Verbindungen (E1)4(E2)2[Sn(E15)4] (E1 = Na, K; E2 = Ca, Sr, Ba; E15 = P, As, Sb, Bi) wurden durch Schmelzreaktionen, ausgehend von der Zusammensetzung entsprechenden Gemengen der Elemente erhalten. Sie kristallisieren im Na6[ZnO4]-Typ (hexagonal, Raumgruppe: P63mc, Z = 2; Na4Ca2[SnP4]: a = 938,94(7), c = 710,09(8) pm; K4Sr2[SnAs4]: a = 1045,0(2), c = 767,0(1) pm; K4Ba2[SnP4]: a = 1029,1(6), c = 780,2(4) pm; K4Ba2[SnAs4]: a = 1051,3(1), c = 795,79(7) pm; K4Ba2[SnSb4]: a = 1116,9(2), c = 829,2(1) pm; K4Ba2[SnBi4]: a = 1139,5(2), c = 832,0(2) pm). Die Anionenteilstruktur ist durch isolierte Tetraedereinheiten [Sn(E15)4]8– charakterisiert, die entlang [001] alle gleichsinnig ausgerichtet sind. In der Kationenteilstruktur besetzen Alkali- und Erdalkalimetallkationen eine der beiden Punktlagen gemeinsam, während die zweite nur von Alkalimetallkationen eingenommen wird. Nur K4Sr2[SnAs4] konnte bisher in einer weiteren Modifikation isoliert werden, die eine Überstrukturvariante mit dreifachem Zellvolumen (hexagonal, Raumgruppe: P63cm, Z = 6; a = 1801,3(2), c = 767,00(9) pm) und geordneter Kationenteilstruktur darstellt. Pnictogenidostannates(IV) with Discrete Tetrahedral Anions: New Representatives (E1)4(E2)2[Sn(E15)4] (with E1 = Na, K; E2 = Ca, Sr, Ba; E15 = P, As, Sb, Bi) of the Na6[ZnO4] Type and the Superstructure Variant of K4Sr2[SnAs4] The silvery to dark metallic lustrous compounds (E1)4(E2)2[Sn(E15)4] (E1 = Na, K; E2 = Ca, Sr, Ba; E15 = P, As, Sb, Bi) were prepared from melts of stoichiometric mixtures of the elements. They crystallize in the Na6[ZnO4]-type structure (hexagonal, space group: P63mc, Z = 2; Na4Ca2[SnP4]: a = 938.94(7), c = 710.09(8) pm; K4Sr2[SnAs4]: a = 1045.0(2), c = 767.0(1) pm; K4Ba2[SnP4]: a = 1029.1(6), c = 780.2(4) pm; K4Ba2[SnAs4]: a = 1051.3(1), c = 795.79(7) pm; K4Ba2[SnSb4]: a = 1116.9(2), c = 829.2(1) pm; K4Ba2[SnBi4]: a = 1139.5(2), c = 832.0(2) pm). The anionic partial structure consists of tetrahedra [Sn(E15)4]8– orientated all in the same direction along [001]. In the cationic partial structure one of the two cation positions is occupied statistically by alkali and alkaline earth metal atoms. Up to now only for K4Sr2[SnAs4] a second modification could be isolated, forming a superstructure type with three times the unit cell volume (hexagonal, space group: P63cm, Z = 6; a = 1801.3(2), c = 767.00(9) pm) and an ordered cationic partial structure." @default.
- W4241024172 created "2022-05-12" @default.
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- W4241024172 date "2000-06-01" @default.
- W4241024172 modified "2023-10-03" @default.
- W4241024172 title "Pniktogenidostannate(IV) mit isolierten Tetraeder-Anionen: Neue Vertreter (E1)4(E2)2[Sn(E15)4] (mit E1 = Na, K; E2 = Ca, Sr, Ba; E15 = P, As, Sb, Bi) vom Na6[ZnO4]-Typ und die Überstrukturvariante von K4Sr2[SnAs4]" @default.
- W4241024172 doi "https://doi.org/10.1002/(sici)1521-3749(200006)626:6<1373::aid-zaac1373>3.3.co;2-a" @default.
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