PHOSPHATES AND POLYPHOSPHATES OF THE RARE EARTH ELEMENTS. II. PYROPHOSPHATO AND TRIPHOSPHATO COMPLEXES OF NEODYMIUM AND YTTRIUM

Journal Article · Tue Jul 01 04:00:00 EDT 1958 · J. Inorg. & Nuclear Chem.

DOI:https://doi.org/10.1016/0022-1902(58)80113-X· OSTI ID:4311053

Giesbrecht, E; Audrieth, L F

The hydrogen ion displacement method was employed to verify formation of the normal phosphate, pyrophosphate, and triphosphate of yttrium when precipitation of these substances is effected by reaction of aqueous solutions adjusted to pH of 4.5. Titration of yttrium and neodymium salts with standard solutions of pyro- and triphosphates indicates formation of the normal py-roand triphosphates in the more acid solutions, and in the case of triphosphate, the formation of a soluble anionic species in which the ratio of rare earth metal ion to triphosphate is 1:2. Solution of rare earth pyrophosphates in excess of pyrophosphate can also be effected. Elution of ihese rare earths from a typical cation exchange agent (Amerlite IR-120) with triphosphate at pH of 8.5 affords additional evidence for formation of the bis-triphosphato rare earih complex. Large ratios of pyrophosphate to rare earth are needed to effect elution with pyrophosphate. The absorption spectruun of a solution of the bis-triphosphato neodyunium complex differs only slightly from that of an aqueous neodymium chloride solution. (auth)

• Research Organization: Univ. of Illinois, Urbana
• NSA Number: NSA-12-013800
• OSTI ID: 4311053
• Journal Information: J. Inorg. & Nuclear Chem., Journal Name: J. Inorg. & Nuclear Chem. Vol. Vol: 6
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

ABSORPTION
ACIDITY
AMBERLITE
CATIONS
CHEMISTRY
COMPLEXES
DRUGS
GRAIN SIZE
HYDROGEN
ION EXCHANGE
ION EXCHANGE MATERIALS
IONS
LIQUIDS
NEODYMIUM CHLORIDES
NEODYMIUM PHOSPHATES
PHOSPHATES
POLYMERS
POWDERS
PRECIPITATION
PYROPHOSPHATES
QUALITATIVE ANALYSIS
RARE EARTHS
RESINS
SEPARATION PROCESSES
SOLUTIONS
SPECTRA
STANDARDS
TITRATION
WATER
YTTRIUM PHOSPHATES