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Eine Zintl-Phase mit isolierten SnSb48 -Anionen: Na8SnSb4 A Zintl Phase with Isolated S n S b / - Anions, Na8SnSb4 Brigitte Eisenmann* und Jürgen Klein Abteilung II für Anorganische Chemie im Eduard-Zintl-Institut der Technischen Hochschule Darmstadt, Hochschulstraße 4, D-6100 Darmstadt Herrn Professor Dr. Albrecht Rabenau zum 65. Geburtstag gewidmet Z. Naturforsch. 43b, 6 9 - 7 1 (1988); eingegangen am 10. September 1987 Crystal Structure, Semimetallic Anions, Zintl Phases The new compound Na8SnSb4 has been prepared from appropriate mixtures of the

structural long-range order. We start the following discussion with a short overview on valence-precise binary beryllium compounds and a survey of beryllium-containing Zintl phases and finally focus on binary and multinary beryllium intermetallics. The basic crystallographic data of all these phases are compiled in the Pearson database [ 10 ]. In addition to the crystal chemical data, in the following subchapters we also briefly review the physical properties of the respective beryllium intermetallics, where applicable. Except for the few technologically important

Introduction Zintl phases gained some interest as reversible hydrogen storage materials since they react under mild conditions, e.g. CaSiH 1.3 [ 1 ], [ 2 ], KSiH 3 [ 3 ], [ 4 ] or SrAl 2 H 2 [ 5 ], [ 6 ]. Chemisorbed hydrogen storage materials can be divided into (i) ionic (e.g. MgH 2 ) or (ii) complex metal hydrides (e.g. NaAlH 4 , or LiBH 4 ) or (iii) molecular hydrides (e.g. NH 3 BH 3 ) [ 7 ], [ 8 ], [ 9 ], [ 10 ], [ 11 ], [ 12 ]. Ionic metal hydrides like MgH 2 exhibit strong Coulomb interactions of the hydride anions with metal cations and thus show high

Sr14[Al4]2[Ge]3: Eine Zintl-Phase mit isolierten [Ge]4–- und [Al4]8–-Anionen Sr14[Al4]2[Ge]3: A Zintl Phase with Isolated [Ge]4− and [Al4]8− Anions Marco Wendorff und Caroline Röhr Institut für Anorganische und Analytische Chemie, Universität Freiburg, Albertstr. 21, D-79104 Freiburg, Germany Reprint requests to Prof. Dr. C. Röhr. E-mail: Z. Naturforsch. 2007, 62b, 1227 – 1234; received June 5, 2007 The new ternary intermetallic compound Sr14[Al4]2[Ge]3 was synthesized from stoichiomet- ric ratios of the elements. The crystal

NaGaSn5, eine neue Zintl-Phase mit Ga—Sn-Schrauben NaGaSn5, a New Zintl Phase Containing Ga—Sn Helices Wolfgang Blase und Gerhard Cordier* Eduard-Zintl-Institut der Technischen Hochschule Darmstadt, Abteilung Anorganische Chemie II, Hochschulstraße 4, D-6100 Darmstadt Z . Naturforsch. 43b, 1017-1019 (1988); eingegangen am 28. März 1988 Gallides, Stannides, Crystal Structure, Zintl-Phases NaGaSn, (trigonal; P3,12 (No. 151); a = 632.8(4), c = 617.0(3) pm, Z - 1; dv = 5.33 g/cm3) was grown from the melt. The crystal structure contains Ga and Sn atoms in a

1162 Notizen N O T I Z E N Sr2Sb3, eine Zintl-Phase mit Sb6-Kettenanion Sr 2 Sb3, a Z i n t l - P h a s e w i t h a S b ö - C h a i n A n i o n B r i g i t t e E i s e n m a n n * A b t e i l u n g I I f ü r A n o r g a n i s c h e C h e m i e , E d u a r d - Z i n t 1 - I n s t i t u t d e r T e c h n i s c h e n H o c h s c h u l e D a r m s t a d t , H o c h s c h u l s t r a ß e 4 , D - 6 1 0 0 D a r m s t a d t Z . N a t u r f o r s c h . 3 4 b , 1 1 6 2 - 1 1 6 4 ( 1 9 7 9 ) ; e i n g e g a n g e n a m 2 . M a i 1 9 7 9 S t r o n t i u m A n t i

Ca3AISb3 und Ca5Al2Bi6, zwei neue Zintlphasen mit kettenförmigen Anionen New Zintl Phases with Chain Anions: On Ca3AlSb3 and Ca5Al2Bi6 Gerhard Cordier, H erbert Schäfer* und Michael Stelter Abteilung II für Anorganische Chemie im Eduard-Zintl-Institut der Technischen Hochschule Darmstadt, Hochschulstr. 4, D-6100 Darmstadt Z. Naturforsch. 39b, 727—732 (1984); eingegangen am 25. Januar 1984 Calcium Antimonidoaluminates, Calcium Bismutidoaluminates, Crystal Structures, Zintl Phases The new compound Ca3AlSb3 crystallizes in the orthorhombic system (space group Pnma

Zur Kenntnis farbiger ternärer und quaternärer Zintl-Phasen Coloured Ternary and Quaternary Zintl-Phases Ursula Eberz, Werner Seelentag und Hans-Uwe Schuster* Institut für Anorganische Chemie der Universität zu Köln, Greinstraße 6, D-5000 Köln 41 Z. Naturforsch. 35b, 1341-1343 (1980); eingegangen am 5. August 1980 Lithium, Magnesium, Scandium, Gold, Palladium Ternary and quaternary, mostly coloured compounds of Au, Pd and Pt, resp., with Li, Mg, Sc and Sn were prepared and structurally investigated. They crystallize in a "filled" Zinkblende type structure

1 Introduction The alkaline earth metals form a large variety of binary electron-precise Zintl phases with the tetrel elements [ 1 ], [ 2 ], [ 3 ]. The typical textbook examples are Ca 2 Si, CaSi and CaSi 2 with isolated Si 4− ions, Si 2− zig-zag chains and Si − arsenic-related puckered hexagons, respectively. Due to the close proximity of the ionic radii [ 4 ] of the pairs Ca 2+ (100 pm)/Yb 2+ (102 pm) and Sr 2+ (118 pm)/Eu 2+ (117 pm), such Zintl phases are also formed with the divalent rare earth elements. Especially the europium compounds of this

Notizen 1151 NOTIZEN Ba3Sn2As4, eine neue Zintlphase mit Kettenstruktur On Ba3Sn2As4, a New Zintl Phase with Chain Structure Brigitte Eisenmann, Hanna Jordan und H erbert Schäfer* A bteilung II für A norganische C hem ie im E d u ard -Z in tl-In stitu t der T echnischen H ochschule D arm stad t, H ochschulstraße 4, D-6100 D arm stad t Z . N aturforsch. 39b, 1151-1153 (1984); eingegangen am 5. M ärz 1984 B ariu m arsen idopo lystannate(III), C rystal S truc tu re , Z in tl Phases T he new com pound B a3Sn2A s4 crystallizes in the m onoclinic system