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Preparation and Crystal Structure of the Ternary Lanthanoid Nickel Arsenides Ln13Ni25As19 (Ln = Tm, Yb, and Lu)

Identifieur interne : 002067 ( Istex/Corpus ); précédent : 002066; suivant : 002068

Preparation and Crystal Structure of the Ternary Lanthanoid Nickel Arsenides Ln13Ni25As19 (Ln = Tm, Yb, and Lu)

Auteurs : Wolfgang Jeitschko ; Ludger J. Terbüchte ; Ute Ch. Rodewald

Source :

RBID : ISTEX:933DE9E38CB404B4069839D9C25C129EFC583B2D

English descriptors

Abstract

The title compounds were prepared by reaction of the elemental components at high temperatures. They crystallize with a new structure type which was determined from single‐crystal X‐ray data of Tm13Ni25As19: P 6, a = 1621.9(4) pm, c = 387.78(8) pm, Z = 1, R = 0.025 for 3164 structure factors and 119 variable parameters. The refinement of the occupancy parameters suggested a mixed Tm/Ni occupancy for one metal position and defects for one nickel site resulting in the composition Tm12.57(1)Ni25.22(2)As19. These arsenides belong to a large structural family with a metal to metalloid ratio of 2 : 1.

Url:
DOI: 10.1002/1521-3749(200109)627:9<2095::AID-ZAAC2095>3.0.CO;2-B

Links to Exploration step

ISTEX:933DE9E38CB404B4069839D9C25C129EFC583B2D

Le document en format XML

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<p>The title compounds were prepared by reaction of the elemental components at high temperatures. They crystallize with a new structure type which was determined from single‐crystal X‐ray data of Tm
<hi rend="subscript">13</hi>
Ni
<hi rend="subscript">25</hi>
As
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 = 1,
<hi rend="italic">R</hi>
 = 0.025 for 3164 structure factors and 119 variable parameters. The refinement of the occupancy parameters suggested a mixed Tm/Ni occupancy for one metal position and defects for one nickel site resulting in the composition Tm
<hi rend="subscript">12.57(1)</hi>
Ni
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As
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<hi rend="bold">Darstellung und Kristallstruktur der ternären Lanthanoid‐Nickel‐Arsenide </hi>
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Ni
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<p>Die im Titel genannten Verbindungen wurden durch Reaktion der elementaren Komponenten bei hohen Temperaturen hergestellt. Sie kristallisieren in einem neuen Strukturtyp, der aus Röntgen‐Einkristalldaten von Tm
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Ni
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As
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bestimmt worden ist:
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 = 1.
<hi rend="italic">R</hi>
 = 0,025 für 3164 Strukturfaktoren und 119 variable Parameter. Die Verfeinerung der Besetzungsparameter ergab eine gemischte Tm/Ni‐Besetzung für eine der Metallpositionen und eine leichte Unterbesetzung einer Nickellage entsprechend der Zusammensetzung Tm
<hi rend="subscript">12,57(1)</hi>
Ni
<hi rend="subscript">25,22(2)</hi>
As
<hi rend="subscript">19</hi>
. Diese Arsenide gehören zu einer großen Strukturfamilie mit einem Metall‐ zu Metalloid‐Verhältnis von 2 : 1.</p>
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<title type="main" xml:lang="en">Preparation and Crystal Structure of the Ternary Lanthanoid Nickel Arsenides
<i>Ln</i>
<sub>13</sub>
Ni
<sub>25</sub>
As
<sub>19</sub>
(
<i>Ln</i>
 = Tm, Yb, and Lu)</title>
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<personName>
<givenNames>Wolfgang</givenNames>
<familyName>Jeitschko</familyName>
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<personName>
<givenNames>Ludger J.</givenNames>
<familyName>Terbüchte</familyName>
</personName>
</creator>
<creator xml:id="au3" creatorRole="author" affiliationRef="#a1">
<personName>
<givenNames>Ute Ch.</givenNames>
<familyName>Rodewald</familyName>
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<keyword xml:id="kwd1">Crystal structure</keyword>
<keyword xml:id="kwd2">Rare earth compounds</keyword>
<keyword xml:id="kwd3">Arsenides</keyword>
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<title type="main">Abstract</title>
<p>The title compounds were prepared by reaction of the elemental components at high temperatures. They crystallize with a new structure type which was determined from single‐crystal X‐ray data of Tm
<sub>13</sub>
Ni
<sub>25</sub>
As
<sub>19</sub>
:
<i>P</i>
 6,
<i>a</i>
 = 1621.9(4) pm,
<i>c</i>
 = 387.78(8) pm,
<i>Z</i>
 = 1,
<i>R</i>
 = 0.025 for 3164 structure factors and 119 variable parameters. The refinement of the occupancy parameters suggested a mixed Tm/Ni occupancy for one metal position and defects for one nickel site resulting in the composition Tm
<sub>12.57(1)</sub>
Ni
<sub>25.22(2)</sub>
As
<sub>19</sub>
. These arsenides belong to a large structural family with a metal to metalloid ratio of 2 : 1.</p>
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<p>
<b>Darstellung und Kristallstruktur der ternären Lanthanoid‐Nickel‐Arsenide </b>
<i>Ln</i>
<b>
<sub>13</sub>
Ni
<sub>25</sub>
As
<sub>19</sub>
(</b>
<i>Ln</i>
<b> = Tm, Yb und Lu)</b>
</p>
<p>Die im Titel genannten Verbindungen wurden durch Reaktion der elementaren Komponenten bei hohen Temperaturen hergestellt. Sie kristallisieren in einem neuen Strukturtyp, der aus Röntgen‐Einkristalldaten von Tm
<sub>13</sub>
Ni
<sub>25</sub>
As
<sub>19</sub>
bestimmt worden ist:
<i>P</i>
 6,
<i>a</i>
 = 1621,9(4) pm,
<i>c</i>
 = 387,78(8) pm,
<i>Z</i>
 = 1.
<i>R</i>
 = 0,025 für 3164 Strukturfaktoren und 119 variable Parameter. Die Verfeinerung der Besetzungsparameter ergab eine gemischte Tm/Ni‐Besetzung für eine der Metallpositionen und eine leichte Unterbesetzung einer Nickellage entsprechend der Zusammensetzung Tm
<sub>12,57(1)</sub>
Ni
<sub>25,22(2)</sub>
As
<sub>19</sub>
. Diese Arsenide gehören zu einer großen Strukturfamilie mit einem Metall‐ zu Metalloid‐Verhältnis von 2 : 1.</p>
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<title>Preparation and Crystal Structure of the Ternary Lanthanoid Nickel Arsenides Ln13Ni25As19 (Ln = Tm, Yb, and Lu)</title>
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<abstract lang="en">The title compounds were prepared by reaction of the elemental components at high temperatures. They crystallize with a new structure type which was determined from single‐crystal X‐ray data of Tm13Ni25As19: P 6, a = 1621.9(4) pm, c = 387.78(8) pm, Z = 1, R = 0.025 for 3164 structure factors and 119 variable parameters. The refinement of the occupancy parameters suggested a mixed Tm/Ni occupancy for one metal position and defects for one nickel site resulting in the composition Tm12.57(1)Ni25.22(2)As19. These arsenides belong to a large structural family with a metal to metalloid ratio of 2 : 1.</abstract>
<abstract>Darstellung und Kristallstruktur der ternären Lanthanoid‐Nickel‐Arsenide Ln13Ni25As19 (Ln = Tm, Yb und Lu)</abstract>
<abstract>Die im Titel genannten Verbindungen wurden durch Reaktion der elementaren Komponenten bei hohen Temperaturen hergestellt. Sie kristallisieren in einem neuen Strukturtyp, der aus Röntgen‐Einkristalldaten von Tm13Ni25As19 bestimmt worden ist: P 6, a = 1621,9(4) pm, c = 387,78(8) pm, Z = 1. R = 0,025 für 3164 Strukturfaktoren und 119 variable Parameter. Die Verfeinerung der Besetzungsparameter ergab eine gemischte Tm/Ni‐Besetzung für eine der Metallpositionen und eine leichte Unterbesetzung einer Nickellage entsprechend der Zusammensetzung Tm12,57(1)Ni25,22(2)As19. Diese Arsenide gehören zu einer großen Strukturfamilie mit einem Metall‐ zu Metalloid‐Verhältnis von 2 : 1.</abstract>
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