Journal ArticleDOI
Über Perowskitphasen in den Systemen AOSE2O3UO2,x mit A = Erdalkali und SE = Seltene Erden, La sowie Y. VIII. Die Systeme Ba2CaUO6Ba2Gd0,67UO6 und Ba2CaUO6Ba2Y0,67UO6
TLDR
In this paper, the deviations from the ideal behaviour are studied by x-ray, diffuse reflectance and vibrational methods by using a vibrational method and the ordered perovskite Ba2SrUO6 forms a solid solution series with Ba2Gd067UOO6 and Ba2Y0,67O6 respectively.Abstract:
Die geordneten Perowskite Ba2SrUO6 und Ba2Gd0,67UO6 bzw Ba2Y0,67UO6 bilden eine luckenlose Reihe von Mischkristallen Die Abweichungen vom idealen Verhalten werden rontgenographisch sowie an Hand der diffusen Reflexionsspektren und Schwingungsspektren untersucht
On Perovskite Phases in the Systems AOSe2O3UO2,x with A = Alkaline Earth Metal and SE = Rare Earths, La, and Y IX The Systems Ba2SrUo6Ba2Gd067UO6 and Ba2SrUO6Ba2Y067UO6
The ordered perovskite Ba2SrUO6 forms a solid solution series with Ba2Gd067UO6 and Ba2Y0,67UO6 respectively The deviations from the ideal behaviour are studied by x-ray, diffuse reflectance and vibrational methodsread more
Citations
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Journal ArticleDOI
A review of the high temperature oxidation of uranium oxides in molten salts and in the solid state to form alkali metal uranates, and their composition and properties
TL;DR: An extensive review of the literature on the high temperature reactions (both in melts and in the solid state) of uranium oxides resulting in the formation of insoluble alkali metal (Li to Cs) uranates is presented in this article.
Journal ArticleDOI
Schwingungsspektroskopische Untersuchungen an geordneten Perowskiten A 2IIBMO6. I. MO6‐Oktaeder: Symmetrie, Kraftkonstanten und Abstände
A. Fadini,I. Jooss,S. Kemmler-Sack,G. Rauser,H.-J. Rother,E. Schillinger,H.‐J. Schittenhelm,U. Treiber +7 more
TL;DR: According to their vibrational spectra the ordered perovskites ABMO6 can be divided in three groups: compound with 1. MO6 octahedra of symmetry Oh, 2. MO 6 octahedral of lowered point symmetry, 3. different kinds of MO6-Oktahedra as discussed by the authors.
Journal ArticleDOI
The electronic spectra of alkali metal uranates and band assignments: an analysis of their diffuse reflectance spectra
TL;DR: In this paper, the diffuse reflectance spectra of alkali metal (Li, Na, K, Rb and Cs) mono-and diuranates, as well as several additional lithium polyuranates(VI), have been measured at 25 and − 196°C, and up to 500°C for the potassium uranates.
Journal ArticleDOI
Über Ordnungs-Unordnungsphänomene bei Sauerstoff perowskiten vom Typ A2+3B2+M5+2O9
U. Treiber,S. Kemmler-Sack +1 more
TL;DR: In this paper, the vibrational and diffuse reflectance spectra of a cubic disordered perovskite of the type A2+3B2+M5+2O9 are discussed.
Journal ArticleDOI
Über Hexagonale Perowskite mit Kationenfehlstellen. I. Verbindungen vom Typ Ba2B 1/3III□2/3ReVIIO6
S. Kemmler‐Sack,I. Jooss +1 more
TL;DR: In this article, a rhombohedral layer structure of 12 L-type with 6 formula units in the unit cell is formed with BIII = SmGd HoLu, Y, Sc, In (yellow); Tb (black-brown); Dy (yellow-orange).
References
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Journal ArticleDOI
Electronic and vibrational spectra of ordered perovskites
G. Blasse,A.F. Corsmit +1 more
TL;DR: In this paper, the electronic absorption and emission spectra of ordered perovskites A 2 BWO 6 were described and the charge transfer absorption of the tungstate group depends on the choice of A and B. The WO 6 group in Ba 2 MgWO 6 showed two different emissions, a blue and a yellow one.
Journal ArticleDOI
Vibrational spectra of ordered perovskites
TL;DR: The vibrational spectra of the molecular M6+O6 (M = Mo, Te, W) group in ordered perovskites of the type Ba2M2+M6 +O6 are reported in this article.
Journal ArticleDOI
Über Perowskite der Zusammensetzung A2BUIVO6 mit A,B = Ba, Sr, Ca, Mg und Pb
S. Kemmler‐Sack,I. Seemann +1 more
TL;DR: In this article, the influence of the A and B ions on the charge transfer O u are studied by diffuse reflectance measurements, which are completed by vibrational spectroscopic spectroscopy and structural investigations.
Journal ArticleDOI
Über Perowskitphasen in den Systemen BaO–SE2O3–UO2,x mit SE = Seltene Erden, La und Y. I. Verbindungen der Zusammensetzung Ba2SE0,67UO6 und Ba2SE0,67UO5,5
Sibylle Kemmler-Sack,I. Hofelich +1 more
TL;DR: In this paper, the structural relations of the ordered perovskite A2BB′O6 are discussed and the strukturellen beziehungen zu den geordneten Perowskiten A2SE0,67UO5,5 warden diskutiert.
Journal ArticleDOI
Über Das System Ba2Sm0,67U1−xWxO6
TL;DR: In this paper, the ordered perovskites Ba2Sm0.67UO6 and Ba2sm0.6 are forming a complete serie of solid solutions with 4 formula units in the unit cell and the relations between color and constitution are shown.
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Über Perowskite der Zusammensetzung A2BUIVO6 mit A,B = Ba, Sr, Ca, Mg und Pb
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Über Perowskitphasen in den Systemen BaO–SE2O3–UO2,x mit SE = Seltene Erden, La und Y. I. Verbindungen der Zusammensetzung Ba2SE0,67UO6 und Ba2SE0,67UO5,5
Sibylle Kemmler-Sack,I. Hofelich +1 more