Neue Verbindungen Ag2HgMX4 mit Wurtzstannitstruktur / New Compounds Ag2HgMX4 with the Wurtzstannite Type Structure

1989 ◽  
Vol 44 (9) ◽  
pp. 1035-1036 ◽  
Author(s):  
H. Haeuseler ◽  
M. Himmrich
Keyword(s):  
Solid State ◽  
Type Structure ◽  
Solid State Reactions ◽  
Similar Composition ◽  
X Ray ◽  
Unknown Structure ◽  
New Compounds

Three new compounds, Ag2HgGeS4, Ag2HgSnS4, and Ag2HgSnSe4, crystallizing in the wurtzstannite type structure have been prepared by solid state reactions at 700°C and characterized by X-ray powder methods. A fourth compound of similar composition Ag2HgGeSe4, with an hitherto unknown structure crystallizes cubically with a = 10.796 A.

Zur Kenntnis quaternärer Telluride Cu2MM′Te4 mit Tetraederstrukturen / Quaternary Tellurides Cu2MM′Te4 with Tetrahedral Structures

1991 ◽  
Vol 46 (8) ◽  
pp. 1049-1052 ◽  
Author(s):  
H. Haeuseler ◽  
F. W. Ohrendorf ◽  
M. Himmrich
Keyword(s):  
Solid State ◽  
Type Structure ◽  
Solid State Reactions ◽  
X Ray

Quaternary tellurides Cu2MM′Te4 (M = Zn, Cd, Hg and M′ = Si, Ge, Sn) have been prepared by solid state reactions and characterized by X-ray powder methods. All 9 compounds crystallize in a stannite type structure.

Novel Thioborates of Cesium: Cs3BS3 and Li2CsBS3

2002 ◽  
Vol 57 (12) ◽  
pp. 1433-1438 ◽  
Author(s):  
J. Kuchinke ◽  
J. Küper ◽  
B. Krebs
Keyword(s):  
Solid State ◽  
Metal Sulfide ◽  
Solid State Reactions ◽  
Monoclinic Space Group ◽  
Amorphous Boron ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
New Compounds

The new compounds Li2CsBS3 and Cs3BS3 were prepared from the metal sulfide(s), amorphous boron and sulfur in solid state reactions at high temperatures. The crystal structures were determined by single crystal X-ray diffraction experiments. The purity of the products was proved by powder diffraction. Li2CsBS3 crystallizes in the orthorhombic space group Pnma (no. 62) with a = 10.004(2), b = 8.000(2), c = 8.082(2) Å , and Z = 4, while Cs3BS3 is isotypic to Rb3BS3 in the monoclinic space group P21/c (no. 14) with a = 10.397(1), b = 6.660(1), c = 13.618(1) Å , β = 101.31(1) °, and Z = 4. Both compounds contain isolated [BS3]3− anions with boron in a trigonal-planar coordination.

ZrCuSiAs-type Phosphide Oxides: TbRuPO, DyRuPO, the Series LnOsPO (Ln = La, Ce, Pr, Nd, Sm), and ThAgPO

2008 ◽  
Vol 63 (8) ◽  
pp. 934-940 ◽  
Author(s):  
Wolfgang Jeitschko ◽  
Barbara I. Zimmer ◽  
Robert Glaum ◽  
Ludger Boonk ◽  
Ute Ch. Rodewald
Keyword(s):  
Phase Transitions ◽  
Solid State ◽  
Single Crystal ◽  
Chemical Bonding ◽  
Large Family ◽  
Type Structure ◽  
Solid State Reactions ◽  
X Ray ◽  
History Of ◽  
High Transition

The title compounds were prepared by solid-state reactions and via tin and NaCl/KCl fluxes. They crystallize with the tetragonal ZrCuSiAs-type structure (P4/nmm, Z = 2), which was refined from single-crystal X-ray data of PrOsPO (a = 402.1(1), c = 824.0(1) pm, wR2 = 0.0490, 365 F2) and ThAgPO (a = 396.1(1), c = 877.8(1) pm, wR2 = 0.0307, 314 F2). They belong to a large family of isotypic compounds, of which several, mainly fluorine doped, iron containing compounds LnFeAsO1-xFx were discovered to be superconducting with relatively high transition temperatures only recently in other laboratories. Chemical bonding in these compounds is briefly discussed, and the importance of the weakly bonding Fe-Fe interactions for the phase transitions and the superconductivity is emphasized from the viewpoint of structural chemistry. A brief account of the history of the preparation of these compounds in our laboratory is given. Originally many of these compounds were obtained only in small amounts as byproducts in the course of the preparation of ternaries.

TEM studies of solid-state reactions in sputter-deposited Nb/Al multilayer thin films

1996 ◽  
Vol 54 ◽  
pp. 1020-1021
Author(s):  
F. Ma ◽  
S. Vivekanand ◽  
K. Barmak ◽  
C. Michaelsen
Keyword(s):  
Thin Films ◽  
Solid State ◽  
Stoichiometric Composition ◽  
Analytical Electron Microscopy ◽  
Grain Structure ◽  
Solid State Reactions ◽  
Multilayer Thin Films ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sputter Deposited

Solid state reactions in sputter-deposited Nb/Al multilayer thin films have been studied by transmission and analytical electron microscopy (TEM/AEM), differential scanning calorimetry (DSC) and X-ray diffraction (XRD). The Nb/Al multilayer thin films for TEM studies were sputter-deposited on (1102)sapphire substrates. The periodicity of the films is in the range 10-500 nm. The overall composition of the films are 1/3, 2/1, and 3/1 Nb/Al, corresponding to the stoichiometric composition of the three intermetallic phases in this system.Figure 1 is a TEM micrograph of an as-deposited film with periodicity A = dA1 + dNb = 72 nm, where d's are layer thicknesses. The polycrystalline nature of the Al and Nb layers with their columnar grain structure is evident in the figure. Both Nb and Al layers exhibit crystallographic texture, with the electron diffraction pattern for this film showing stronger diffraction spots in the direction normal to the multilayer. The X-ray diffraction patterns of all films are dominated by the Al(l 11) and Nb(l 10) peaks and show a merging of these two peaks with decreasing periodicity.

Synthesis and Crystal Chemistry of New Transition Metal Tellurium Oxides in Compounds Containing Lead and Barium

2000 ◽  
Vol 658 ◽  
Author(s):  
Boris Wedel ◽  
Katsumasa Sugiyama ◽  
Kimio Itagaki ◽  
Hanskarl Müller-Buschbaum
Keyword(s):  
Solid State ◽  
Transition Metal ◽  
Solid State Reactions ◽  
Solid State Chemistry ◽  
Wide Field ◽  
Synthesis Conditions ◽  
Lead Compounds ◽  
Alkaline Transition ◽  
New Compounds ◽  
Channel Structures

ABSTRACTDuring the past decades the solid state chemistry of tellurium oxides has been enriched by a series of quaternary metallates. Interest attaches not only to the chemical and physical properties of these compounds, but also to their structure, which have been studied by modern methods. The partial similarity of earth alkaline metals and lead in solid state chemistry and their relationships in oxides opens a wide field of investigations. Eight new compounds in the systems Ba-M-Te-O (M= Nb, Ta) and Pb-M-Te-O (M = Mn, Ni, Cu, Zn) were prepared and structurally characterized: Ba2Nb2TeO10, Ba2M6Te2O21 (M = Nb, Ta) and the lead compounds PbMnTeO3, Pb3Ni4.5Te2.5O15, PbCu3TeO7, PbZn4SiTeO10 and the mixed compound PbMn2Ni6Te3O18. The structures of all compounds are based on frameworks of edge and corner sharing oxygen octahedra of the transition metal and the tellurium. Various different channel structures were observed and distinguished. The compounds were prepared by heating from mixtures of the oxides, and the single crystals were grown by flux method or solid state reactions on air. The synthesis conditions were modified to obtained microcrystalline material for purification and structural characterizations, which were carried out using a variety of tools including powder diffraction data and refinements of X-ray data. Relationships between lead transition metal tellurium oxides and the earth alkaline transition metals tellurium oxides are compared.

scholarly journals Zur Kenntnis eines Barium-Oxoniobat-Tellurats: Ba2Nb2TeO10 / On a Barium-Oxoniobate-Tellurate: Ba2Nb2TeO10

1996 ◽  
Vol 51 (10) ◽  
pp. 1407-1410 ◽  
Author(s):  
B. Wedel ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Single Crystals ◽  
Solid State Reactions ◽  
Orthorhombic Symmetry ◽  
X Ray ◽  
Lattice Constants ◽  
Group D ◽  
Symmetry Space ◽  
Symmetry Space Group

Single crystals of Ba2Nb2TeO10) have been prepared by solid state reactions in air. X-ray investigations led to orthorhombic symmetry, space group D152h-Pbca, a = 7.242(4), b = 12.433(3), c = 9.932(3) Å. Z = 4. Nb5+ and Te6+ show octahedral coordination by O2- . The crystal structure is characterized by planes of edge- and corner-sharing NbO6- and TeO6octahedra. It is shown that in spite of nearly identical lattice constants of Ba2Nb2TeO10 with compounds of the composition M0,5BaNbTe2O9 the so far unknown crystals of these substances may not be derived from the Ba2Nb2TeO10 type.

Compounds of Complex Halo and Pseudohalo Acids of the Group IIB Metals, Part V [1] Preparative and Spectroscopic Studies of the [Hg2I5]-, [Hg2I6]2- and [Hg3I8]2- Ions

1982 ◽  
Vol 37 (5) ◽  
pp. 646-648 ◽  
Author(s):  
S. P. Perlepes ◽  
Th. F. Zafiropoulos ◽  
A. K. Anagnostopoulos ◽  
A. G. Galinos
Keyword(s):  
Solid State ◽  
Spectroscopic Studies ◽  
Molar Conductance ◽  
X Ray ◽  
New Compounds ◽  
Complex Anions

The preparations of new compounds, containing the complex anions [Hg2l5]-, [Hg2l6]2- and [Hg3I8]2-, are reported.Distorted iodine-bridged configurations are proposed for the complexes in the solid state, utilising analyses, X-ray powder patterns, molar conductance measurements and spectral (IR, UV) data

Synthese und Struktureines Strontium-Vanadyl-Phosphats: Sr2(VO)(PO4)2 / Synthesis and Structure of a Strontium Vanadyl Phosphate: Sr2(VO)(PO4)2

1996 ◽  
Vol 51 (7) ◽  
pp. 929-933 ◽  
Author(s):  
C. Wadewitz ◽  
Hk. Müller-Buschbaum
Keyword(s):  
Solid State ◽  
Solid State Reactions ◽  
Vanadyl Phosphate ◽  
Monoclinic Symmetry ◽  
X Ray ◽  
Vanadyl Group ◽  
Dark Green ◽  
Symmetry Space ◽  
Oxygen Distance ◽  
Symmetry Space Group

Dark green single crystals of Sr2(VO)P2O8 have been prepared by solid state reactions in closed quartz tubes. X-ray investigations led to monoclinic symmetry, space group C2h6-I2/a, a = 6.744(4), b = 15.866(4), c = 7.032(2) Å, β = 115.41(2), Z = 4. Sr2(VO)P2O8 is isotypic to Sr2(VO)V2O8 and shows V4+ in split positions. The split positions are in non-centric octahedral coordination forming a short vanadium to oxygen distance typical for the vanadyl group. The crystal chemistry of the monovanadyl orthophate Sr2(VO)P2O8 is discussed considering related divanadyl phosphates.

Structural and Concentration Heterogeneities during Formation of Silicide Phases in the Thin Film System Ti(5nm)/Ni(24nm)/Si(001)

2013 ◽  
Vol 344 ◽  
pp. 79-84
Author(s):  
S.I. Sidorenko ◽  
S.M. Voloshko ◽  
Yu.M. Мakogon ◽  
O.P. Pavlov ◽  
I.E. Kotenko ◽  
...  
Keyword(s):  
Thin Film ◽  
Mass Spectrometry ◽  
Solid State ◽  
Auger Spectroscopy ◽  
Solid State Reactions ◽  
Layer By Layer ◽  
Film System ◽  
X Ray ◽  
Thin Film System ◽  
Secondary Ions

By the methods of Auger-spectroscopy and mass-spectrometry of secondary ions, small-angle electron diffraction, X-ray and resistometry analyses the solid-state reactions in the Ti(5 nm)/ Ni(24 nm)/Si(001) thin film system at annealing in running nitrogen in the temperature interval of 723 – 1273 К are investigated. Regularities of phase transformations, consistency of solid-state reactions, layer-by-layer redistribution of components during annealing, features of surface morphology during formation of inclusions of silicide phases are established.

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