Seven new rare-earth transition-metal oxychalcogenides: Syntheses and characterization of Ln{sub 4}MnOSe{sub 6} (Ln=La, Ce, Nd), Ln{sub 4}FeOSe{sub 6} (Ln=La, Ce, Sm), and La{sub 4}MnOS{sub 6}
Journal Article
·
· Journal of Solid State Chemistry
- Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, IL 60208-3113 (United States)
The quaternary oxychalcogenides Ln{sub 4}MnOSe{sub 6} (Ln=La, Ce, Nd), Ln{sub 4}FeOSe{sub 6} (Ln=La, Ce, Sm), and La{sub 4}MnOS{sub 6} have been synthesized by the reactions of Ln (Ln=La, Ce, Nd, Sm), M (M=Mn, Fe), Se, and SeO{sub 2} at 1173K for the selenides or by the reaction of La{sub 2}S{sub 3} and MnO at 1173K for the sulfide. Warning: These reactions frequently end in explosions. These isostructural compounds crystallize with two formula units in space group C{sub 6v}{sup 4}-P6{sub 3}mc of the hexagonal system. The cell constants (a, c in A) at 153K are: La{sub 4}MnOSe{sub 6}, 9.7596(3), 7.0722(4); La{sub 4}FeOSe{sub 6}, 9.7388(4), 7.0512(5); Ce{sub 4}MnOSe{sub 6}, 9.6795(4), 7.0235(5); Ce{sub 4}FeOSe{sub 6}, 9.6405(6), 6.9888(4); Nd{sub 4}MnOSe{sub 6}, 9.5553(5), 6.9516(5); Sm{sub 4}FeOSe{sub 6}, 9.4489(5), 6.8784(5); and La{sub 4}MnOS{sub 6}, 9.4766(6), 6.8246(6). The structure of these Ln{sub 4}MOQ{sub 6} compounds comprises a three-dimensional framework of interconnected LnOQ{sub 7} bicapped trigonal prisms, MQ{sub 6} octahedra, and the unusual LnOQ{sub 6} tricapped tetrahedra.
- OSTI ID:
- 20725926
- Journal Information:
- Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Journal Issue: 5 Vol. 178; ISSN 0022-4596; ISSN JSSCBI
- Country of Publication:
- United States
- Language:
- English
Similar Records
Synthesis and characterization of the rare-earth dicyanamides Ln[N(China){sub 2}]{sub 3} with Ln=La, Ce, Pr, Nd, Sm, and Eu
Double tungstate K/sub 5/La(WO/sub 4/)/sub 4/. [Attempts to prepare K/sub 5/Ln(WO/sub 4/)/sub 4/ (Ln = La to Gd, Y)]
Syntheses, Structure, Magnetism, and Optical Properties of the Ordered Interlanthanide Copper Chalcogenides Ln{sub 2}YbCuQ{sub 5} (Ln = La, Ce, Pr, Nd, Sm; Q = S, Se): Evidence for Unusual Magnetic Ordering in Sm{sub 2}YbCuS{sub 5}
Journal Article
·
Fri Jan 14 23:00:00 EST 2005
· Journal of Solid State Chemistry
·
OSTI ID:20721668
Double tungstate K/sub 5/La(WO/sub 4/)/sub 4/. [Attempts to prepare K/sub 5/Ln(WO/sub 4/)/sub 4/ (Ln = La to Gd, Y)]
Journal Article
·
Fri Oct 31 23:00:00 EST 1975
· Inorg. Mater. (USSR) (Engl. Transl.); (United States)
·
OSTI ID:7361594
Syntheses, Structure, Magnetism, and Optical Properties of the Ordered Interlanthanide Copper Chalcogenides Ln{sub 2}YbCuQ{sub 5} (Ln = La, Ce, Pr, Nd, Sm; Q = S, Se): Evidence for Unusual Magnetic Ordering in Sm{sub 2}YbCuS{sub 5}
Journal Article
·
Thu Nov 18 23:00:00 EST 2010
· Chemistry of Materials
·
OSTI ID:1051658