Rh2Sb with (anti-)PbCl2-Type Structure

1990 ◽  
Vol 45 (7) ◽  
pp. 947-951 ◽  
Author(s):  
Wolfgang Jeitschko ◽  
Rainer O. Altmeyer
Keyword(s):  
Single Crystal ◽  
Crystal Chemistry ◽  
Homogeneity Range ◽  
Type Structure ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Lattice Constants ◽  
Rich Side

Crystals of Rh2Sb were prepared by sintering the elemental components in a NaCl/KCl flux. They crystallize in the orthorhombic space group Pnma with the lattice constants α = 572.1(1)-573.6(1) pm, b = 417.1(1)-418.1(1) pm, c = 792.8(2)-794.9(1) pm, V = 0.1892-0.1906 nm3 for the antimony- and rhodium-rich side, respectively, of the homogeneity range at 800 °C. The structure belongs to the Co2Si-branch of the (anti-)PbCl2-type. It was refined from single-crystal diffractometer data to a residual R = 0.059. The crystal chemistry of the various PbCl2-type compounds is briefly reviewed.

Strukturvarianten des MgCu2-Typs: Die Verbindungen Mg2Ni3P und Mg2Ni3As / Variants of the MgCu2 Type: The Compounds Mg2Ni3P and Mg2Ni3As

1992 ◽  
Vol 47 (10) ◽  
pp. 1351-1354 ◽  
Author(s):  
Viktor Keimes ◽  
Albrecht Mewis
Keyword(s):  
Single Crystal ◽  
Homogeneity Range ◽  
Hexagonal Lattice ◽  
Structure Type ◽  
Type Structure ◽  
X Ray ◽  
Lattice Constants ◽  
Metal Atoms ◽  
Rhombohedral Symmetry

The compounds Mg2Ni3P and Mg2Ni3As were prepared by heating the elements. Their structures have been determined from single-crystal X-ray data. The structure of the phosphide is a rhombohedral ternary variant of the cubic Laves structure type MgCu2 (R 3̄ m; hexagonal lattice constants: a = 4.971(0) Å, c = 10.961(2) Å). The ordered substitution of one quarter of the metal atoms by phosphorus and the resulting shorter distances are responsible for the rhombohedral symmetry.The arsenide crystallizes in the MgCu2 type structure (Fd 3 m; a = 6.891(1)A, composition Mg2Ni3As) with a statistic distribution of the Ni and As atoms; the relevant homogeneity range extends from Mg2Ni2.9As1.1 to Mg2Ni3.5As0.5.

Die Verbindungen MgFe6Ge6 und LiCo6Ge6 / The Compounds MgFe6Ge6 and LiCo6Ge6

1978 ◽  
Vol 33 (8) ◽  
pp. 877-880 ◽  
Author(s):  
Werner Buchholz ◽  
Hans-Uwe Schuster
Keyword(s):  
Single Crystal ◽  
Type Structure ◽  
Space Group ◽  
Lattice Constants

The hexagonally crystallizing compounds MgFe6Ge6 and LiCo6Ge6 were prepared and structurally characterized by single crystal investigations. The lattice constants are a = 506.7 pm, c = 804.5 pm, c/a= 1.58s for MgFe6Ge6 and a = 504.8 pm, c = 772.9 pm, c/a = 1.531 for LiCo6Ge6. The structures (space group P6/mmm) are closely related to the structure of LiFe6Ge6 and the B 35-type structure of FeGe.

The Stannides EuPdSn and EuPtSn

1996 ◽  
Vol 51 (6) ◽  
pp. 806-810 ◽  
Author(s):  
Rainer Pöttgen
Keyword(s):  
Single Crystal ◽  
Single Crystals ◽  
Crystal Chemistry ◽  
Three Dimensional ◽  
Type Structure ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray

Abstract EuPdSn and EuPtSn were prepared from the elements in tantalum tubes at 1070 K and investigated by X-ray diffraction on both powder as well as single crystals. They crystallize with the TiNiSi type structure of space group Pnma and with Z = 4 formula units per cell. Both structures were refined from single-crystal diffractometer data: a = 751.24(9), b = 469.15(6), c = 804.31(9) pm, V = 0.2835(1) nm3 for EuPdSn, and a = 753.38(7), b = 467.72(4), c = 793.08(7) pm, V = 0.2795(1) nnr for EuPtSn. The structures consist of three-dimensional [PdSn] and [PtSn] polyanionic networks in which the europium atoms are embedded. The crystal chemistry of these stannides is briefly discussed

Dy3Co6Sn5 – a New Stannide with an Ordered La3Al11 Type Structure

1995 ◽  
Vol 50 (2) ◽  
pp. 175-179 ◽  
Author(s):  
Rainer Pöttgen
Keyword(s):  
Rare Earth ◽  
Transition Metal ◽  
Single Crystal ◽  
Crystal Chemistry ◽  
Title Compound ◽  
Type Structure ◽  
Orthorhombic Space Group ◽  
X Ray ◽  
Arc Melting ◽  
New Type

The title compound has been obtained by arc-melting of the elemental components and subsequent annealing at 800 °C. It crystallizes in the orthorhombic space group Immm, a = 430.3(1), b = 1235.0(2), c = 967.6(3) pm, V = 0.5142(2) nm3, Z = 2. The structure has been determined from single-crystal X-ray data and refined to R = 0.0181 for 747 F2 values and 28 variables. It is of a new type and can be described as a ternary ordered version of the binary La3Al11-type structure. Dy3Co6Sn5 is built up from DyCo2Sn2 and DyCo2Sn slabs with ThCr2Si2 and Cu3Au-like atomic arrangements, respectively. Its crystal chemistry is compared with that of structurally related rare earth transition metal gallides.

scholarly journals NaBeAs(Sb) – Ternäre Phasen im „aufgefüllten“ NiAs(Ni2In)-Typ / NaBeAs(Sb) – Ternary Phases in a „Filled“ NiAs(Ni2In)-Structure

1977 ◽  
Vol 32 (10) ◽  
pp. 1133-1138 ◽  
Author(s):  
Christoph Tiburtius ◽  
Hans-Uwe Schuster
Keyword(s):  
Single Crystal ◽  
Structure Determination ◽  
Type Structure ◽  
Crystal Data ◽  
Space Group ◽  
Lattice Constants ◽  
Structure Space

NaBeAs and NaBeSb crystallize in a modified Ni2In-type-structure, space group P 63/mmc–D6h4. Preparation and structure determination with powder and single crystal data are described. The bonds and the structure are discussed in comparison with corresponding compounds of the formula AMeIIX. The lattice constants are:NaBeAs: α = 3,820(5), c = 8,948(9), c/α = 2,34;NaBeSb: α = 4,144(5), c = 9,320(9), c/α = 2,25.

Ein Beitrag zur Synthese neuer chiraler Phosphanliganden / Synthesis of a New Chiral Phosphine Ligand

1989 ◽  
Vol 44 (8) ◽  
pp. 879-883 ◽  
Author(s):  
Dieter Fenske ◽  
Kurt Merzweiler
Keyword(s):  
Single Crystal ◽  
Phosphine Ligand ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
Lattice Constants ◽  
Mucochloric Acid

The new chiral diphosphine 2 was synthesized from mucochloric acid. The structure of the NiI2-complex 7 was determined by single crystal X-ray analysis. 7 crystallizes in the orthorhombic space group P212121. The lattice constants (at 180 K) are: a = 914.1(2); b = 1422.0(3); c = 4112.5(10) pm.

Die Kristallstruktur des "Indium-Dibromids" (InIInIIIBr4)/The Crystal Structure of "Indium Dibromide" (InIlnIIIBr4)

1987 ◽  
Vol 42 (2) ◽  
pp. 251-252 ◽  
Author(s):  
H. P. Beck
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Lattice Constants

Abstract The crystal structure of InIlnIIIBr4 (Indium-Di-bromide) has been determined by single crystal methods. The compound crystallizes with a GaCl 2 -type arrangement in the orthorhombic space group Pnna with the lattice constants: a = 797.6(2) pm, b = 1036.6(2) pm, c =1038.8(2) pm.

Two lithium tricyanomethanide compounds: syntheses and single-crystal structure determination of LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO

2015 ◽  
Vol 70 (3) ◽  
pp. 191-196 ◽  
Author(s):  
Olaf Reckeweg ◽  
Francis J. DiSalvo
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Single Crystals ◽  
Structure Determination ◽  
Monoclinic Space Group ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
Cell Parameters ◽  
New Compounds

AbstractThe new compounds LiK[C(CN)3]2 and Li[C(CN)3]·½ (H3C)2CO were synthesized and their crystal structures were determined. Li[C(CN)3]·½ (H3C)2CO crystallizes in the orthorhombic space group Ima2 (no. 46) with the cell parameters a=794.97(14), b=1165.1(2) and c=1485.4(3) pm, while LiK[C(CN)3]2 adopts the monoclinic space group P21/c (no. 14) with the cell parameters a=1265.7(2), b=1068.0(2) and c=778.36(12) pm and the angle β=95.775(7)°. Single crystals of K[C(CN)3] were also acquired, and the crystal structure was refined more precisely than before corroborating earlier results.

scholarly journals β-Y(BO2)3 – a new member of the β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu) structure family

2017 ◽  
Vol 72 (12) ◽  
pp. 983-988 ◽  
Author(s):  
Martin K. Schmitt ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Single Crystal ◽  
Lattice Parameters ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray

Abstractβ-Y(BO2)3 was synthesized in a Walker-type multianvil module at 5.9 GPa/1000°C. The crystal structure has been elucidated through single-crystal X-ray diffraction. β-Y(BO2)3 crystallizes in the orthorhombic space group Pnma (no. 62) with the lattice parameters a=15.886(2), b=7.3860(6), and c=12.2119(9) Å. Its crystal structure will be discussed in the context of the isotypic lanthanide borates β-Ln(BO2)3 (Ln=Nd, Sm, Gd–Lu).

scholarly journals Struktur- und Phasenübergangsuntersuchungen an β-Li2ZnGe/ Structure and Phase Transition Investigations on β-Li2ZnGe

1981 ◽  
Vol 36 (8) ◽  
pp. 917-921 ◽  
Author(s):  
Hans-Otto Cullmann ◽  
Heinz-Walter Hinterkeuser ◽  
Hans-Uwe Schuster
Keyword(s):  
Phase Transition ◽  
Thermal Analysis ◽  
Differential Thermal Analysis ◽  
Single Crystal ◽  
Ternary Compound ◽  
Type Structure ◽  
Crystal Data ◽  
Space Group ◽  
Cell Parameters ◽  
Structure Space

Abstract The ternary compound β-Li2ZnGe was prepared and its structure determined from powder and single crystal data. The compound crystallizes in a modified Na3As type structure, space group Ṗ̇̇̇̇̇̇̇̇̇̇̇̇̇̇3̄m 1 - D33d.The cell parameters are: a = 432.6 pm, c = 1647.0 pm, c/a= 3.83.A phase transition between a-and β-Li2ZnGe was found and the reaction of the elements lithium, zinc and germanium to a-Li2ZnGe was followed by differential thermal analysis. The temperatures and the enthalpies of transition and fusion were determined.

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