Urania

Industrial refractories are by thek very nature stable materials and usually do not constitute a physiological hazard. This is not so, however, for unusual refractories that might contain heavy metals or radioactive oxides, such as thoria and urania, or to bkiders or additives that may be toxic. 

Spiess-Urania Chemicals (Germany) Thakker Chemical (India)... 

Spiess-Urania Chemicals GmbH, 166 Spolanaa.s., 154 Spolchemie a. s., 154... 

Another significant comparison between the two systems concerns the partial pressures of the metal dioxide molecules. These pressures are relatively insensitive to the condensed-phase composition and are quite similar in the plutonia and urania systems. Calculated metal dioxide vapor pressures are compared in Table V for 0/M = 1.96. 

It appears that the presence of U6+, for which there is no counterpart in the Pu/O system, is responsible for preventing the oxygen pressures from increasing as rapidly in the mixed-oxide system as in the plutonia system. These results (39J indicate that the oxygen partial pressures in equilibrium with the mixed oxide will not differ drastically from those in equilibrium with urania. 

Schwenke KD (1985) Eiweifiquellen der Zuknnft. Urania-Verlag, Leipzig, German Democratic Republic... 

Zirconium carbide is a highly refractory compound with excellent properties but, unlike titanium carbide, it has found only limited industrial importance except as coating for atomic-fuel particles (thoria and urania) for nuclear-fission power plants.l " ] This lack of applications may be due to its high price and difficulty in obtaining it free of impurities. 

The following reactions can be considered for the preparation of uranium fluorides (UF4 or UF6) starting from urania (U02) at a temperature of 500 °C ... 

Waite, Arthur Edward. A new light of mysticism. Azoth or the star in the East. Embracing the first matter of the Magnum Opus, the evolution of Aphrodite-Urania, the supernatural generation of the Son of the Sun, and the alchemical transfiguration of humanity. London New York Madras Theosophical Publ. Soc The Path Theosophical Soc, 1893. xvi, 240p. 

Then suddenly, against her will but in all lucidity, Urania the ancient Greek muse of astronomy was compelled to admit that what is visible is only the froth of existence. She even came to give precedence to what cannot be seen, to what neither shines nor absorbs light. Astronomical observation and theoretical reasoning suggest that most of matter is actually invisible. 

Synonyms uranium oxide uranic oxide urania uranium(IV) oxide... 

Washington,DC(1958) 12)E,BJalborski, Raketen, Satelliten, Raumschiffe, Urania-Verlag, Leipzig(1958) 13)H.S.Seifert,... 

A mathematical model of the processes leading to steam explosions has been developed for the contact of hot liquids or molten solids dropping into water [1]. A review of detonation theory leads to an attempt to apply it to melt/water combinations, with particular reference to molten oxides in nuclear reactor melt-down. Alumina /water is more violent than urania/water [2]. 

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