THE OXYSULFIDES Me$sub 2$$O$$sub 2$S OF THE ELEMENTS OF THE RARE EARTH GROUP

Journal Article · Tue Jul 01 04:00:00 EDT 1958 · Bull. soc. chim. France No.

OSTI ID:4311054

Flahaut, J; Guittard, M; Patrie, M

The oxysulfides of the general formula Me/sub 2/O/sub 2/S were prepared with ten elements of the rare earths, Ce, La, Pr, Nd, Sm, Gd, Dy, Er, Yb, and Y. They all have the same crystal strncture, the Ce/sub 2/O/sub 2/S type. They posses particularly high melting points, above 20004DE. Differences were observed in their chemical properties which develop progressively from the beginning,; to the end of the series. In particular, the cerium oxysulfides are easily attacked by acids, the yttrium derivatives less, and the ytterbium oxysulfide is only decomposed by aqua regia. Oxidation in air is not observed below 600 d except for cerium oxysulfide which can not be kept in air. Aluminum affects them at high temperatures by selective fixation of oxygen and by leaving a residue of subsulfide MeS. (tr-auth)

• Research Organization: Laboratoire de Chimie Minerale, Paris
• NSA Number: NSA-12-013798
• OSTI ID: 4311054
• Journal Information: Bull. soc. chim. France No., Journal Name: Bull. soc. chim. France No. Vol. Vol: 7
• Country of Publication: Country unknown/Code not available
• Language: French

Related Subjects

ACIDS
AIR
ALUMINUM
CERIUM SULFIDES
CHEMICAL REACTIONS
CHEMISTRY
CRYSTALS
DECOMPOSITION
DYSPROSIUM SULFIDES
ERBIUM SULFIDES
GADOLINIUM SULFIDES
HIGH TEMPERATURE
HYDROCHLORIC ACID
LANTHANUM SULFIDES
LATTICES
MELTING POINTS
NEODYMIUM SULFIDES
NITRIC ACID
OXIDATION
OXYSULFIDES
PRASEODYMIUM SULFIDES
PREPARATION
RARE EARTHS
RESIDUES
SAMARIUM SULFIDES
SULFIDES
TEMPERATURE
YTTERBIUM SULFIDES
YTTRIUM SULFIDES