The analysis of uranium silicides

Technical Report · Sat Jan 15 04:00:00 EST 1966

OSTI ID:4546035

Milner, G. W.C.; Rowe, D. H.; Phillips, G.

A procedure is described for the chemical analysis of uranium silicides varying in composition from the monosilicide to the disilicide. Dissolution of samples is achieved by pre-igniting at 850 deg C and then fusing with Na₂CO₃ in a nickel crucible. After extracting the melt with water, the silicon is converted to its silicomolybdate complex between pH 1.5 and 1.7. Excess of molybdate in solution is inactivated by the addition of concentrated hydrochloric acid, and then quinoline is added to precipitate quinoline silicomolybdate. The precipitate is filtered onto a sintered glass filter, dried at 150 deg C and then weighed. The silicon content is determined from the weight of precipitate, the precision of determination begin better than +- 0.5%. For the determination of uranium, a separate sample is taken and dissolved in HNO₃. + HF. The determination is completed by controlled-potential coulometry on a sulfuric acid solution of the sample. The suitability of these procedures have been confirmed by employing them for the complete analysis of typical uranium mono- and disilicide samples (auth)

• Research Organization: Atomic Energy Research Establishment, Harwell, England (United Kingdom)
• NSA Number: NSA-20-020557
• OSTI ID: 4546035
• Report Number(s): AERE-R--5129
• Country of Publication: United Kingdom
• Language: English

Related Subjects

Analytical Procedures
CHEMISTRY
CRUCIBLES
CURRENTS
EFFICIENCY
ELECTROLYTIC CELLS
ERRORS
FILTERS
GLASS
HEATING
HETEROCYCLICS
HYDROCHLORIC ACID
HYDROFLUORIC ACID
HYDROXIDES
MOLYBDENUM OXIDES
NICKEL
NITRIC ACID
ORGANIC NITROGEN COMPOUNDS
PRECIPITATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
QUANTITY RATIO
QUINOLINE
SILICON
SILICON COMPOUNDS
SODIUM CARBONATES
SOLUBILITY
SOLVENT EXTRACTION
SULFURIC ACID
TEMPERATURE
URANIUM
URANIUM SILICIDES
VOLTAMETRY
WATER
WEIGHT