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The Solid State Chemistry of Rare Earth Oxide Systems. Technical Progress Report, 1967--1968.
None
Date:
1968~
Creator:
Eyring, LeRoy; Jenkins, Michael S.; Scherer, Volker; Stone, G. Duane; Turcotte, Rheal P.; Warmkessel, Joyce M. et al.
System:
The UNT Digital Library
The Solid State Chemistry of Rare Earth Oxides. Technical Progress Report, 1968--1969.
None
Date:
1969~
Creator:
Eyring, Leroy; Herrick, Claude C.; Jenkins, Michael S.; Fox, Donald L.; Turcotte, Rheal P. & Weber, Gary R.
System:
The UNT Digital Library
Solid State Chemistry of Rare Earth Oxides. Technical Progress Report, 1969--1970.
None
Date:
1970
Creator:
Eyring, Leroy; Felmlee, Theron L.; Fox, Donald L.; Haschke, John M. & Lowe, Arthur T.
System:
The UNT Digital Library
Solid state chemistry of rare earth oxides. Technical progress report, 1974--1975. [High-resolution electron optical methods at 3 A resolution]
Electron microscope images obtained at about 3A resolution for Pr/sub 7/O/sub 12/ (and isomorphous Zr/sub 3/Sc/sub 4/O/sub 12/) are in excellent agreement with calculated images based upon the structure determined separately by total profile neutron powder diffraction analysis. The image calculation programs establish the efficacy of lattice image interpretation in structural terms for these types of related phases whose structures are as yet beyond conventional means to determine. Such images for several other intermediate phases are interpreted and structures proposed. Finally, images of crystals which can be made to undergo reaction within the microscope are interpreted according to the structures involved. These studies reveal the role of intergrowth and topotaxy in these systems. (auth)
Date:
June 25, 1975
Creator:
Eyring, LeRoy; Summerville, Edward & Skarnulis, A. Jerome
System:
The UNT Digital Library
Solid state chemistry of rare earth oxides. Technical progress report, 1975--1976. [Pr/sub 7/O/sub 12/; Pr/sub 10/O/sub 18/; HfO/sub 2/. xEr/sub 2/O/sub 3/]
It has been demonstrated that electron microscope images obtained at about 3A resolution for Pr/sub 7/O/sub 12/ are in agreement with calculated images based upon known structures. This establishes the efficacy of crystal structure image interpretation in structural terms, including the defect structure and mechanism of phase reactions, for these types of related phases whose structures are as yet beyond conventional means to determine. Further work on the epsilon (Pr/sub 10/O/sub 18/) phase is reported both utilizing electron optical methods and single crystal X-ray techniques. The ternary ceramic system HfO/sub 2/.xEr/sub 2/O/sub 3/ is being examined using electron optical techniques and ordering not hitherto reported is being observed. An interactive crystal structure image calculation system is being developed which will permit the immediate comparison of enhanced images synthesized from trial structures (including defects) and displayed in juxtaposition on a graphics unit. 22 fig. (auth)
Date:
April 15, 1976
Creator:
Eyring, LeRoy; Skarnulis, A. Jerome; Tuenge, R. T. & Von Dreele, R. B.
System:
The UNT Digital Library