Author: Kandace Renee Thomas
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Synthesis and Characterization of Rare Earth-nickel-gallium Ternary Intermetallics
Author: Kandace Renee Thomas
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
Study of New Ternary Rare-Earth Intermetallic Germanides with Polar Covalent Bonding
Author: Riccardo Freccero
Publisher: Springer
ISBN: 9783030589943
Category : Technology & Engineering
Languages : en
Pages : 221
Book Description
The thesis focuses on the syntheses, structural characterizations and chemical bonding analyses for several ternary R–M–Ge (R = rare earth metal; M = another metal) intermetallics. The challenges in understanding the main interactions governing the chemistry of these compounds, which lead to our inability to predict their formation, structure and properties, are what provided the motivation for this study. In particular, the R2MGe6 (M = Li, Mg, Al, Cu, Zn, Pd, Ag), R4MGe10-x (M = Li, Mg), R2Pd3Ge5, Lu5Pd4Ge8, Lu3Pd4Ge4 and Yb2PdGe3 phases were synthesized and structurally characterized. Much effort was put into the stabilization of metastable phases, employing the innovative metal flux method, and into the accurate structure solution of twinned crystals. Cutting-edge position-space chemical bonding techniques were combined with new methodologies conceived to correctly describe the Ge–M, Ge–La and also La–M polar-covalent interactions for the La2MGe6 (M = Li, Mg, Al, Cu, Zn, Pd, Ag) series. The present results constitute a step forward in our comprehension of ternary germanide chemistry as well as providing a good playground for further investigations.
Publisher: Springer
ISBN: 9783030589943
Category : Technology & Engineering
Languages : en
Pages : 221
Book Description
The thesis focuses on the syntheses, structural characterizations and chemical bonding analyses for several ternary R–M–Ge (R = rare earth metal; M = another metal) intermetallics. The challenges in understanding the main interactions governing the chemistry of these compounds, which lead to our inability to predict their formation, structure and properties, are what provided the motivation for this study. In particular, the R2MGe6 (M = Li, Mg, Al, Cu, Zn, Pd, Ag), R4MGe10-x (M = Li, Mg), R2Pd3Ge5, Lu5Pd4Ge8, Lu3Pd4Ge4 and Yb2PdGe3 phases were synthesized and structurally characterized. Much effort was put into the stabilization of metastable phases, employing the innovative metal flux method, and into the accurate structure solution of twinned crystals. Cutting-edge position-space chemical bonding techniques were combined with new methodologies conceived to correctly describe the Ge–M, Ge–La and also La–M polar-covalent interactions for the La2MGe6 (M = Li, Mg, Al, Cu, Zn, Pd, Ag) series. The present results constitute a step forward in our comprehension of ternary germanide chemistry as well as providing a good playground for further investigations.
Synthesis, Characterization and Computational Studies of Binary and Ternary Intermetallic Compounds in the Systems Alkaline Earth Metal - Transition Metal - Tetrel Element
Author: Lisa Siggelkow
Publisher:
ISBN:
Category :
Languages : en
Pages : 244
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 244
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 702
Book Description
Exploratory Synthesis in the Quaternary System Including Rare-earth, Transition Metal, Gallium and a Tetrelide Using Liquid Gallium as a Solvent
Author: Marina A. Zhuravleva
Publisher:
ISBN:
Category : Gallium
Languages : en
Pages : 668
Book Description
Publisher:
ISBN:
Category : Gallium
Languages : en
Pages : 668
Book Description
Synthesis, Structure, Bonding, and Physical Properties of Novel Binary and Ternary Rare-earth Metal Germanides
Author:
Publisher:
ISBN: 9781109249088
Category : Germanides
Languages : en
Pages :
Book Description
The aspects of composition, structure-bonding, and properties, along with the reasons governing the formation of one phase over another all still, quite surprisingly remain an open question concerning intermetallic compounds. This work was therefore inspired by a need to better understand the above-mentioned characteristics for several binary and ternary rare-earth (RE) germanides. The structure and properties discussed herein, report the crystal chemistry and physical properties associated with over 40 new binary and ternary intermetallic compounds synthesized from their respective elements using either classical solid state reactions or by the metal flux growth technique. All contain the Group 14 element Ge along with several of the lanthanide f-block metals (commonly referred to as rare-earths) which represent the majority of the binary compounds while the ternary compounds include the additional combination of select s - and p -block metals and semi-metals - Mg, Ca, In, Sn. Their crystal structures and compositions were determined using a number of techniques including single-crystal and powder X-ray diffraction, electron diffraction and electron microscopy. Along with the structure and bonding, this dissertation devotes a discussion to the physical properties which are exhibited by these compounds as a function of temperature or magnetic field in association with their bulk magnetic susceptibility, electrical resistivity and heat-capacity. The results from these along with certain similarities in their structure and bonding allows for the classification of five families organized based on their chemical formulae which include the following: (1) RE 5-x Mg x Ge 4 (RE = Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) containing two types of Ge-Ge dimers of which their bonding can be affected by small changes in the overall composition; (2) RE 2 InGe2 (RE = Sm, Gd, Tb, Dy, Ho, and Yb) containing [Ge 2] dimers connected with four-coordinated In atoms which results in planar InGe 2 layers; (3) RE Sn 1+x Ge1-x (RE = Y, Gd, Tb, Dy, Ho, Er, Tm), RE 2 [Sn x Ge 1-x] 5 (RE = Nd, Sm), RE [Sn x Ge 1-x]2 (RE = Gd, Tb), which uniquely contain two group 14 elements Ge and Sn that are found to preferentially occupy specific crystallographic sites - these being infinite zig-zag chains of Germanium and square sheets of Sn; (4) RE 3 Ge 4 (RE = Gd, Tb, Dy, Ho, Er, Tm, and Y) containing fused fragments of two-bonded zig-zag Germanium atoms; (5) RE 3 Ge 5 (RE = Sm, Gd, Tb, Dy) an example of polymorphism with two dimensional and three dimensional anionic sub-networks with different orientations of zig-zag chains of Germanium.
Publisher:
ISBN: 9781109249088
Category : Germanides
Languages : en
Pages :
Book Description
The aspects of composition, structure-bonding, and properties, along with the reasons governing the formation of one phase over another all still, quite surprisingly remain an open question concerning intermetallic compounds. This work was therefore inspired by a need to better understand the above-mentioned characteristics for several binary and ternary rare-earth (RE) germanides. The structure and properties discussed herein, report the crystal chemistry and physical properties associated with over 40 new binary and ternary intermetallic compounds synthesized from their respective elements using either classical solid state reactions or by the metal flux growth technique. All contain the Group 14 element Ge along with several of the lanthanide f-block metals (commonly referred to as rare-earths) which represent the majority of the binary compounds while the ternary compounds include the additional combination of select s - and p -block metals and semi-metals - Mg, Ca, In, Sn. Their crystal structures and compositions were determined using a number of techniques including single-crystal and powder X-ray diffraction, electron diffraction and electron microscopy. Along with the structure and bonding, this dissertation devotes a discussion to the physical properties which are exhibited by these compounds as a function of temperature or magnetic field in association with their bulk magnetic susceptibility, electrical resistivity and heat-capacity. The results from these along with certain similarities in their structure and bonding allows for the classification of five families organized based on their chemical formulae which include the following: (1) RE 5-x Mg x Ge 4 (RE = Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, and Y) containing two types of Ge-Ge dimers of which their bonding can be affected by small changes in the overall composition; (2) RE 2 InGe2 (RE = Sm, Gd, Tb, Dy, Ho, and Yb) containing [Ge 2] dimers connected with four-coordinated In atoms which results in planar InGe 2 layers; (3) RE Sn 1+x Ge1-x (RE = Y, Gd, Tb, Dy, Ho, Er, Tm), RE 2 [Sn x Ge 1-x] 5 (RE = Nd, Sm), RE [Sn x Ge 1-x]2 (RE = Gd, Tb), which uniquely contain two group 14 elements Ge and Sn that are found to preferentially occupy specific crystallographic sites - these being infinite zig-zag chains of Germanium and square sheets of Sn; (4) RE 3 Ge 4 (RE = Gd, Tb, Dy, Ho, Er, Tm, and Y) containing fused fragments of two-bonded zig-zag Germanium atoms; (5) RE 3 Ge 5 (RE = Sm, Gd, Tb, Dy) an example of polymorphism with two dimensional and three dimensional anionic sub-networks with different orientations of zig-zag chains of Germanium.
Metals Abstracts
Author:
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 782
Book Description
Publisher:
ISBN:
Category : Metallurgy
Languages : en
Pages : 782
Book Description
INIS Atomindeks
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1086
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 1086
Book Description
Nuclear Science Abstracts
Author:
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 692
Book Description
Publisher:
ISBN:
Category : Nuclear energy
Languages : en
Pages : 692
Book Description
Chemical Abstracts
Author:
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 2002
Book Description
Publisher:
ISBN:
Category : Chemistry
Languages : en
Pages : 2002
Book Description