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HEXAFLUORIDES OF MOLYBDENUM, TUNGSTEN AND URANIUM. II. REACTIONS WITH LIQUID AND GASEOUS DINITROGEN TETROXIDE

Description: Molybdenum and tungsten hexafluorides form the solids nitrosylium pentafluoroxymolybdate(VI) and -tungstate(VI), respectively. Uranium hexafluoride gives nitrosylium hexafluorouranate(V) STANOUF/sub 6/!, the same salt that it forms with nitric oxide. (auth)
Date: January 29, 1962
Creator: Geichman, J. R.; Smith, E. A.; Swaney, L. R. & Ogle, P. R.
Partner: UNT Libraries Government Documents Department
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Measurement of Dissociation Pressure of Molybdenum Fluoride-Sodium Fluoride Complex

Description: The dynamic (gas saturation) method was used to determine upper and lower limits for the dissociation pressure of the complex formed when MoF/sub 6/ is absorbed by NaF. The limits were 0.4 to 4.6 mm Hg at 100 deg C and 8.4 to 27 mm Hg at 150 deg C. A lower limit, 64 mm Hg, was determined at 200 deg C. As a check on the method the dissociation pressure of the complex UF/sub 6/ - (NaF)/ sub 3/ was determined at 100, 200, and 240 deg C. The measured values were in satisfactory agreement with accep… more
Date: April 11, 1961
Creator: Groves, F. R., Jr.
Partner: UNT Libraries Government Documents Department
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REACTIONS OF MOLYBDENUM, TUNGSTEN AND URANIUM HEXAFLUORIDES WITH NITROGEN COMPOUNDS. III. NITROGEN DIOXIDE AND NITROGEN OXYHALIDES

Description: Reaction between gaseous nitrogen dioxide and gaseous uranium hexafluoride results in the formation of the nitrylium salt NO/sub 2/UF/sub 6/. Under similar conditions no reaction occurs between nitrogen dioxide and molybdenum and tungsten hexafluorides. Reaction between nitrosyl and nitryl fluorides and the three hexafluorides results in solid compounds of the composition NO/sub x/F x MF/sub 6/, where x is 1 or 2 and M represents Mo, W, or U. Reaction between gaseous or liquid nitrosyl chloride… more
Date: January 27, 1961
Creator: Geichman, J. R.; Ogle, P. R. & Swaney, L. R.
Partner: UNT Libraries Government Documents Department
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Volatility Studies of Some Fission Product Fluorides

Description: A preliminary study of the volatility behavior of molybdenum indicated that MoF/sub 5/ was converted to MoF/sub 6/ by F/sub 2/; MoF/sub 6/ and Tc fluoride are absorbed on NaF at 100; technetium fluoride is more strongly held than molybdenum fluoride on NaF; MoF/sub 6/ may not be completely trapped by a dry ice trap. The behavior of volatile fission product fluorides was such that (a) Ru and Nb fluorides were volatile from fused salts during fluorination, (b) Mo and technetium were not volatile … more
Date: June 25, 1958
Creator: Brooksbank, W. A., Jr.; Carter, R. J. & Osborne, M. F.
Partner: UNT Libraries Government Documents Department
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The Thermodynamic Properties of Molten Salts. Report No. 4. Bimonthly Progress Report for August-September 1955

Description: The objective of this research is to determine the absolute entropies, heats of formation, and free energies of formation of selected salts in the temperature range of 800 to 1900 deg F. Assembling and testing of apparatus for measuring heat capacities from about 50 deg K to room temperature has been completed, including calibration of thermocouples by comparison with a platinum and with a copper resistance thermometer. This apparatus has been used to determine the absolute entropy of molybdenu… more
Date: October 10, 1955
Creator: Brady, A. P.
Partner: UNT Libraries Government Documents Department
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The synthesis and structural characterization of novel transition metal fluorides

Description: High purity KMF{sub 6} and K{sub 2}MF{sub 6} salts (M = Mo,Re, Ru, Os, Ir, Pt) are obtained from reduction hexafluorides. A rhombohedral unit cell is observed for KReF{sub 6}. Fluoride ion capture by Lewis acids from the hexafluorometallate (IV) salts affords high purity tetrafluorides for M = Mo, Re, Ru, Os, and Pd. The structure of RuF{sub 4} is determined from X-ray synchrotron and neutron powder data. Unit cells based on theorthorhombic PdF{sub 4} type cell are derived from X-ray powder dat… more
Date: September 1, 1992
Creator: Casteel, W. J. Jr.
Partner: UNT Libraries Government Documents Department
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FLIBE chemistry studies

Description: A 2:1 mixture of LiF and BeF{sub 2} (FLIBE), is a potential tritium breeder material for fusion reactors, in particular, the Advanced Safe Pool Immersed Reactor (ASPIRE). A limited experimental campaign was conducted in an effort to test the postulates of the ASPIRE concept: namely, that MoF{sub 6} is effective in controlling the tritium species by maintaining the FT form and that MoF{sub 6} can serve as a source to plate out Mo on surfaces, thereby making the FLIBE system compatible with the c… more
Date: October 1, 1990
Creator: Clemmer, R.G. (Pacific Northwest Lab., Richland, WA (USA)); Sze, D.K.; Blackburn, P.E.; VanDeventer, E. & Maroni, V.A. (Argonne National Lab., IL (USA))
Partner: UNT Libraries Government Documents Department
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The synthesis and structural characterization of novel transition metal fluorides

Description: High purity KMF[sub 6] and K[sub 2]MF[sub 6] salts (M = Mo,Re, Ru, Os, Ir, Pt) are obtained from reduction hexafluorides. A rhombohedral unit cell is observed for KReF[sub 6]. Fluoride ion capture by Lewis acids from the hexafluorometallate (IV) salts affords high purity tetrafluorides for M = Mo, Re, Ru, Os, and Pd. The structure of RuF[sub 4] is determined from X-ray synchrotron and neutron powder data. Unit cells based on theorthorhombic PdF[sub 4] type cell are derived from X-ray powder dat… more
Date: September 1, 1992
Creator: Casteel, W.J. Jr.
Partner: UNT Libraries Government Documents Department
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Study of the hydrolysis of uranium hexafluoride by Fourier transform infrared spectroscopy

Description: The reaction of uranium hexafluoride with water has been studied by using Fourier transform infrared (FT-IR) spectroscopy. Several different methods for accomplishing this task have been carried out. In addition, interpretatins of the results have been made. These interpretations have been based on literature values for the reactants and for compounds analogous to possible products. It was shown that classical matrix-isolation techniques proved to be unsatisfactory for studying this reaction. O… more
Date: August 1, 1982
Creator: Anderson, S.P.
Partner: UNT Libraries Government Documents Department
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