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  • 1
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 535 (1986), S. 110-122 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Trigonal Planar Coordinated Platinum: Preparation and Crystal Structure of SrPtAs (Sb), BaPtP (As, Sb), SrPtxP2-x, SrPtxAs0,90, and BaPtxAs0,90BaPtP and BaPtAs crystallize in ternary SrSi2-type derivative structures formed by a different ordered occupation of the Si positions by Pt and P (As) (P213, lattice constants see „Inhaltsübersicht“). For the other compounds given in the title we found the AlB2-type structure with a statistical (P6/mmm) or ordered (P6m2) distribution of Pt and P (As, Sb) among the boron sites or a modified Ni2In-type structure which can be described as an ordered superstructure of the AlB2-type (P63/mmc).
    Notes: BaPtP und BaPtAs kristallisieren in ternären Varianten der SrSi2-Struktur, in denen die Si-Positionen auf unterschiedliche Weise geordnet von Pt und P(As) besetzt sind (P213; BaPtP: a = 653,3 pm, BaPtAs: a = 671,6 pm). Für die übrigen im Titel angegebenen Verbindungen fanden wir den AlB2-Typ mit statistischer (P6/mmm) oder geordneter (P6m2) Verteilung von Pt und P (As, Sb) auf den Bor-Plätzen sowie eine Ni2In-Variante, die als geordnete Überstruktur des AlB2-Typs beschrieben werden kann:
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  • 2
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 582 (1990), S. 224-224 
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
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  • 3
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 618 (1992), S. 30-34 
    ISSN: 0044-2313
    Keywords: Calcium palladium pnictides ; Preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Preparation and Crystal Structures of the Compounds CaPdAs, CaPdSb, and CaPdBiThe new compounds CaPdAs, CaPdSb, and CaPdBi were prepared by heating appropriate mixtures of the elements. X-ray structure determinations carried out with single crystals (space group and lattice constants see “Inhaltsübersicht”) showed, that the arsenide crystallizes in a distorted stacking variant of the AlB2, type structure, where the Pd atoms have a planar environment of As atoms. CaPdSb and CaPdBi are isotypic and form the TiNiSi type structure, where the Pd-Atoms are surrounded tetrahedrally (strongly distorted) by Sb or Bi atoms.
    Notes: CaPdAs (Pnma; a = 7,137(1) Å, b = 8,646(2) Å, c = 16,590(3) Å; Z = 16) kristallisiert in einer verzerrten Stapelvariante des AlB2-Typs, bei der die Pd-Atome planar von drei As-Atomen umgeben sind. CaPdSb (a = 7,354(2) Å, b = 4,617(1) Å, c = 7,903(2) Å) und CaPdBi (a = 7,422(2) Å, b = 4,753(1) Å, c = 8,085(2) Å) sind isotyp und bilden die TiNiSi-Struktur (Pnma; Z = 4) mit einer stark verzerrten Tetraederkoordination um die Pd-Atome. Die Verbindungen wurden durch Erhitzen der entsprechenden Elementgemenge dargestellt, die Strukturen röntgenographisch mit Einkristallmethoden bestimmt.
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  • 4
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 618 (1992), S. 35-38 
    ISSN: 0044-2313
    Keywords: Ternary nickelphosphides ; magnesium ; manganese ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Mg3Ni20P6 and Mn3Ni20P6 - Two new Phosphides with Cr23C6-type StructureThe crystal structures of Mg3Ni20P6 (a = 11.113(3)A) and Mg3Ni20P6 (a = 11.085(1)Å) were determined by single crystal X-ray investigations. Both compounds, prepared by heating appropriate mixtures of the elements, crystallize in a ternary variant of the Cr23C6-type structure (Fm3m), which is well-known due to a large number of ternary borides.
    Notes: Die Kristallstrukturen von Mg3Ni20P6 (a = 11,113(3) Å) und Mn3Ni20P6 (a = 11,085(1) Å) wurden röntgenographisch mit Einkristallmethoden bestimmt. Beide Verbindungen, dargestellt durch Erhitzen entsprechender Elementgemenge, bilden eine Besetzungsvariante der Cr23C6-Struktur (Fm3m), in der viele ternäre Boride kristallisieren.
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  • 5
    ISSN: 0044-2313
    Keywords: Ternary Rhodium phosphides ; crystal structure ; phase transition ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: About the Effect of Temperature, Pressure, and Substitution on the Crystal Structure of ARh2P2 (A = Ca, Sr, Eu, Ba)Four compounds ARh2P2 (A = Ca, Sr, Eu, Ba) were prepared by heating mixtures of the elements and investigated by means of single crystal X-ray methods. They crystallize in the ThCr2Si2 type structure (I4/mmm; Z = 2) with P—P distances along [001] reaching from 2.26 Å (CaRh2P2) to 3.74 Å (BaRh2P2). With increasing temperature (EuRh2P2) or increasing pressure (SrRh2P2) a first order phase transition occurs with strong changes of the P—P distances. Substitution of the atoms changes the bond lengths of the compounds too.
    Notes: Vier Verbindungen ARh2P2 (A = Ca, Sr, Eu, Ba) wurden durch Erhitzen entsprechender Elementgemenge dargestellt und hinsichtlich ihrer Kristallstruktur mit Hilfe von Einkristallmethoden charakterisiert. Sie kristallisieren in der tetragonalen ThCr2Si2-Struktur (I4/mmm; Z = 2) und unterscheiden sich im wesentlichen durch ihre P—P-Abstände längs [001]. Diese reichen von 2,26 Å bei CaRh2P2 bis 3,74 Å bei BaRh2P2 und verändern sich drastisch im Zuge von Phasenumwandlungen 1. Ordnung durch Temperaturerhöhung bei EuRh2P2 sowie unter erhöhtem Druck bei SrRh2P2. Substitution übt ebenfalls einen großen Einfluß auf den Strukturfeinbau der Verbindungen aus.
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  • 6
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 620 (1994), S. 561-565 
    ISSN: 0044-2313
    Keywords: Ternary palladium phosphide ; erbium ; crystal structure ; band calculations ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Er3Pd7P4  -  Crystal Structure Determination and Extended Hückel CalculationsEr3Pd7P4 was prepared by heating the elements (1050°C) and investigated by means of single-crystal X-ray methods. The compound crystallizes in a new structure (C2/m; a = 15.180(3) Å, b = 3.955(1) Å, c = 9.320(1) Å, β = 125,65(1)°; Z = 2) with a three-dimensional framework of Pd and P atoms and with Er atoms in the holes. The Pd atoms are surrounded tetrahedrally, trigonally or linearly by P atoms, which are coordinated by nine metal atoms in the form of a tricapped trigonal prism. Therefore the atomic arrangement of Er3Pd7P4 is related to the structures of ternary transition metal phosphides with a metal: phosphorus ratio of 2:1. Band calculations using the Extended Hückel method show strong covalent Pd—P bonds and weak bonding interactions between Pd atoms with Pd—Pd distances shorter than 2.9 Å.
    Notes: Er3Pd7P4 wurde durch Erhitzen der Elemente auf 1050°C dargestellt und röntgenographisch mit Einkristallmethoden untersucht. Die Verbindung kristallisiert monoklin (C2/m; a = 15,180(3) Å, b = 3,955(1) Å, c = 9,320(1) Å, β = 125,65(1)°; Z = 2) in einer neuen Struktur mit einem dreidimensionalen Gerüst aus Pd- und P-Atomen, in dessen Lücken sich die Er-Atome befinden. Die P-Umgebung der Pd-Atome ist tetraedrisch, trigonal oder linear. Die P-Atome ihrerseits werden von 9 Metallatomen in Form eines dreifach überkappten trigonalen Prismas koordiniert. Der Aufbau von Er3Pd7P4 ist dementsprechend verwandt mit den Strukturen ternärer Übergangsmetall-Phosphide mit einem Metall: Nichtmetallverhältnis von 2:1. Extended Hückel Rechnungen zeigen u. a. neben starken kovalenten Pd—P-Bindungen schwache bindende Wechselwirkungen zwischen denjenigen Pd-Atomen, deren Abstände voneinander kürzer als 2,9 Å sind.
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  • 7
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 622 (1996), S. 589-592 
    ISSN: 0044-2313
    Keywords: ternary aluminium germanides ; yttrium ; rare earth ; crystal structure ; band calculations ; electron localization ; superconductivity ; zintl-compounds ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Y2AlGe3 - a Superconductive Metallic Zintl CompoundY2AlGe3 was prepared by heating the elements (950°C) and investigated by means of single-crystal X-ray methods. The compound crystallizes in a new structure (Pnma; a = 6.785(1) Å, b = 4.189(1) Å, c = 17.676(2) Å; Z = 4) with a three-dimensional framework of Al and Ge atoms and with Y in the cavities. The Al atoms are surrounded tetrahedrally by Ge atoms, which are arranged in the form of planar (Ge2-)∞ chains and isolated from each other respectively. Although Y2AlGe3 is a metallic conductor and no valence compound, it achieves the structural requirements of Zintl's concept. This picture is supported by electrondensity and ELF calculations, which reveals covalent Al—Ge and Ge—Ge bondings, therefore Y2AlGe3 is interpreted as a metallic Zintl-Compound, down-playing the metallic propertys. Y2AlGe3 becomes superconductively at 4.5 K. Isotypic compounds are found for Ln2AlGe3 with Ln = Dy, Ho, Er, and Tm (For lattice constants see “Inhaltsübersicht”).
    Notes: Y2AlGe3 wurde durch Erhitzen der Elemente auf 950°C dargestellt und röntgenographisch mit Einkristallmethoden untersucht. Die Verbindung kristallisiert in einer neuen Struktur (Pnma; a = 6,785(1) Å, b = 4,189(1) Å, c = 17,676(2) Å; Z = 4) mit einem dreidimensionalen Gerüst aus Al- und Ge-Atomen, in dessen Lücken sich die Y-Atome befinden. Al ist tetraedrisch von Ge-Atomen umgeben, die ihrerseits ebene (Ge2-)∞-Ketten bilden bzw. voneinander isoliert vorliegen. Trotz nicht valenzmäßiger Zusammensetzung gemäß Y3+ Y3+ Al3+ (Ge2)4- Ge4- und metallischer Leitfähigkeit weist Y2AlGe3 die Strukturmerkmale einer Zintl-Verbindung auf. Diese Interpretation wird gestützt durch Berechnungen der Elektronendichte und Elektronenlokalisierungsfunktion (ELF), die kovalente Ge—Ge- und Al—Ge-Bindungen zeigen. Die Verbindung wird demnach als metallische Zintl-Verbindung angesehen. Y2AlGe3 wird bei 4,5 K supraleitend. Isotyp kristallisieren die Verbindungen Ln2AlGe3 (Ln = Dy—Tm) mit den Gitterkonstanten: Dy2AlGe3: a = 6,785(3) Å, b = 4,171(1) Å, c = 17,665(7) Å Ho2AlGe3: a = 6,753(2) Å, b = 4,158(1) Å, c = 17,580(4) Å Er2AlGe3: a = 6,732(1) Å, b = 4,147(3) Å, c = 17,517(3) Å Tm2AlGe3: a = 6,706(3) Å, b = 4,061(5) Å, c = 17,550(9) Å.
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  • 8
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 597 (1991), S. 173-182 
    ISSN: 0044-2313
    Keywords: (strontium, europium, barium, uranium) nickel phosphides ; arsenides ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Ternary Phosphides and Arsenides of Nickel with a Metal: Non-Metal Ratio of 2:1Several new ternary phosphides and arsenides of nickel were prepared by reaction of the elements. SrNi5P3, SrNi5As3, and EuNi5As3 crystallize in the LaCo5P3 structure with the following lattice constants [Å]: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c}{} \hfill & {\rm a} \hfill & {\rm b} \hfill & {\rm c} \hfill\\{{\rm SrNi}_{\rm 5} {\rm P}_3 :} \hfill & {3.618(1)} \hfill & {11.789(2)} \hfill & {11.597(2)} \hfill\\{{\rm SrNi}_5 {\rm As}_3 :} \hfill & {3.759(1)} \hfill & {12.239(2)} \hfill & {11.890(2)} \hfill\\{{\rm EuNi}_{\rm 5} {\rm As}_3 :} \hfill & {3.742(1)} \hfill & {12.215(2)} \hfill & {11.839(2)} \hfill\\\end{array} $$\end{document}BaNi9P5 (a = 6.534(1) Å, c = 10.847(2) Å) and BaNi9As5 (a = 6.760(1) Å, c = 11.226(2) Å) crystallize in a new type of structure (P63/mmc, Z = 2). The characteristic polyhedra are trigonal Ni-antiprisms centered by P or As atoms and trigonal Ni-prisms with vacant centres and sides capped by non-metal atoms. U2Ni12P7 (a = 9.077(2) Å, c = 3.694(1) Å) has a Zr2Fe12P7 structure (P6, Z = 1).
    Notes: Durch Erhitzen der jeweiligen Elemente konnten einige neue ternäre Nickelphosphide und -arsenide dargestellt werden. SrNi5P3, SrNi5As3 und EuNi5As3 kristallisieren im LaCo5P3-Typ (Cmcm, Z = 4) mit folgenden Gitterkonstanten [Å]: \documentclass{article}\pagestyle{empty}\begin{document}$$ \begin{array}{*{20}c}{} \hfill & {\rm a} \hfill & {\rm b} \hfill & {\rm c} \hfill\\{{\rm SrNi}_{\rm 5} {\rm P}_3 :} \hfill & {3,618(1)} \hfill & {11,789(2)} \hfill & {11,597(2)} \hfill\\{{\rm SrNi}_5 {\rm As}_3 :} \hfill & {3,759(1)} \hfill & {12,239(2)} \hfill & {11,890(2)} \hfill\\{{\rm EuNi}_{\rm 5} {\rm As}_3 :} \hfill & {3,742(1)} \hfill & {12,215(2)} \hfill & {11,839(2)} \hfill\\\end{array} $$\end{document}BaNi9P5 (a = 6,534(1) Å, c = 10,847(2) Å) und BaNi9As5 (a = 6,760(1) Å, c = 11,226(2) Å) bilden einen neuen Strukturtyp (P63/mmc, Z = 2), bei dem trigonale Ni-Antiprismen mit je einem P-bzw. As-Atom in der Mitte sowie allseitig überdachte trigonale Ni-Prismen mit unbesetzten Zentren strukturbestimmend sind. U2Ni12P7 (a = 9,077(2) Å, c = 3,694(1) Å) kristallisiert in der Zr2Fe12P7-Struktur (P6, Z = 1).
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  • 9
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 57-62 
    ISSN: 0044-2313
    Keywords: ternary palladium pnictides ; europium ; calcium ; preparation ; crystal structure ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Structures with AlB2- and CeMg2Si2-Type Units. The Compounds Eu3Pd4As4, Ca4Pd5P5, and Ca5Pd6P6The new compounds Eu3Pd4As4, Ca4Pd5P5, and Ca5Pd6P6 (space groups and lattice constants see „Inhaltsübersicht“) have been prepared by heating mixtures of the elements. Their structures were determined by means of single-crystal X-ray methods and contain exclusively units, which are characteristic for the AlB2- and CeMg2Si2-type. The non-metal atoms are isolated from each other or connected to pairs; the ratio between these two kinds can be interpreted by ionic splittings of the formulas.
    Notes: Eu3Pd4As4 (Pmmm; a = 4,205(2) Å, b = 4,308(1) Å, c = 12,640(7) Å; Z = 1), Ca4Pd5P5 (Cmcm; a = 4,094(1) Å, b = 31,061(4) Å, c = 8,168(1) Å; Z = 4) und Ca5Pd6P6 (Pmma; a = 8,172(2) Å, b = 4,088(1) Å, c = 19,077(6) Å; Z = 2) wurden durch Erhitzen der jeweiligen Elemente dargestellt. Die mit Röntgen-Einkristallmethoden bestimmten Kristallstrukturen setzen sich ausschließlich aus AlB2- und CeMg2Si2-analogen Einheiten zusammen. Die Nichtmetallatome sind teils voneinander isoliert und teils zu Hanteln miteinander verknüpft; das jeweilige Verhältnis läßt sich mit Hilfe einer ionischen Formelaufspaltung interpretieren.
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  • 10
    Electronic Resource
    Electronic Resource
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 621 (1995), S. 1523-1530 
    ISSN: 0044-2313
    Keywords: Ternary copper pnictides ; alkaline earth ; europium ; crystal structure ; magnetism ; Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: New Ternary Copper Pnictides with Modified BaAl4 Type StructuresEuCu2As2 (a = 4.215(1) Å, c = 10.185(2) Å) and EuCu2Sb2 (a = 4.504(1) Å, c = 10.824(2) Å) were prepared by heating (900°C) mixtures of CuCl and arsenic (antimony) with europium. The by-products were dissolved by dilute acetic acid. The arsenide crystallizes in the ThCr2Si2 type structure (I4/mmm; Z = 2) with holes in the copper arrangement, whereas the antimonide forms the CaBe2Ge2 type structure (P4/nmm; Z = 2). The stability ranges of both phases were determined by mixed crystal formation in accordance with EuCu2As2-xSbx. Magnetic measurements showed, that Europium is divalent and that the compounds order magnetically at low temperatures. BaCu2Sb2 (I4/mmm; a = 4.655(1) Å, c = 32.709(6) Å; Z = 6) was prepared by heating a mixture of binary antimonides of barium and copper in a melt of NaCl/KCl. The structure of this compound consists building elements of the CaBe2Ge2 and the ThCr2Si2 type structure. The already known compounds SrCu2As2 and BaCu2As2 were produced in a homogeneous form for the first time and their structures (ThCr2Si2 type) redetermined by means of single crystal X-ray methods.
    Notes: EuCu2As2 (a = 4,215(1) Å, c = 10,185(2) Å) und EuCu2Sb2 (a = 4,504(1) Å, c = 10,824(2) Å) wurden durch Erhitzen entsprechender Gemenge aus CuCl und Arsen bzw. Antimon mit Europium auf ca. 900°C dargestellt und mit verd. Essigsäure von den Nebenprodukten befreit. Das Arsenid kristallisiert im ThCr2Si2-Typ (I4/mmm; Z = 2) mit einer geringfügig unterbesetzten Cu-Punktlage, das Antimonid bildet dagegen die CaBe2Ge2-Struktur (P4/nmm; Z = 2). Durch Mischkristallbildung gemäß EuCu2As2-xSbx wurde das jeweilige Existenzgebiet der Randphasen ermittelt. Europium ist in beiden Verbindungen sowie im analogen Phosphid zweiwertig, die Substanzen ordnen bei tiefen Temperaturen magnetisch. BaCu2Sb2 (I4/mmm; a = 4,655(1) Å, c = 32,709(6) Å; Z = 6) konnte durch Umsetzung binärer Bariumantimonide mit Cu2Sb in einer NaCl/KCl-Schmelze bei 900°C erhalten werden. Die Struktur besteht aus Bauelementen der CaBe2Ge2-und ThCr2Si2-Struktur. Die bereits bekannten Verbindungen SrCu2As2 und BaCu2As2 wurden erstmals röntgenrein dargestellt und ihre Strukturparameter (ThCr2Si2-Typ) anhand von Einkristallen neu bestimmt.
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