Synthesis and structure determination of the new Sm2Ti2O5S2 compound

Crystal Structure and Magnetic Properties of a New Oxyselenide of Gadolinium and Titanium: Gd4TiSe4O4

“…A single crystal in a needle shape, of dimensions 0.012;0.018;0.32 mm 3 , was mounted on a STOE-IPDS single axis di!ractometer with a 2D area detector based on Imaging Plate technology. The crystal-to-detector distance was set to 70 mm, which means a 2 range between 3.33 and 52.13.…”

“…These oxychalcogenides formed by a rare earth element and a second metal crystallize in a layered type structure, with a composite character owing to the alternation of an oxide sheet [¸nO] and a sul"de sheet [¹ V X W ]. Two very recent papers (3,4) reported the existence of a new family of quaternary compounds with rare earth and titanium as metals, and with oxygen and sulfur as anions, for which a composite layered approach was also put forward. Indeed, these phases formulated as¸n Ti S O can be very schematically described as an alternation of slabs of di!erent chemical nature, with this time a sul"de slab [¸n S ] and an oxide slab [Ti O ].…”

Crystal structures of two new oxysulfides La5Ti2MS5O7 (M=Cu, Ag): evidence of anionic segregation

“…The RE 2 Ti 2 S 2 O 5 (RE=La, Ce, Pr, Sm) compounds exhibit such intergrowth structures with [RE 2 S 2 ] rock-salt-type layers alternating regularly with [Ti 2 O 5 ] perovskite-type layers [1,2]. In the same way, the structure of the (Sr n+1 M n O 3nÀ1 )(Cu 2 S 2 ) (M=Sc, Fe, Ni, Cu) compounds can be described as an intergrowth of [Sr n+1 M n O 3nÀ1 ] perovskite and [Cu 2 S 2 ] fluorite-type layers [3,4].…”

The Family of Ln2Ti2S2O5 Compounds (Ln=Nd, Sm, Gd, Tb, Dy, Ho, Er, and Y): Optical Properties

“…A new series of isotypic compounds with the Ln 2 Ti 2 S 2 O 5 composition was very recently synthesized (1,2). The crystal structure type of these semi-transparent compounds with orange brownish colors can be schematically described as the stacking of a rare earth sulfide layer alternating with a titanium oxide one; this gives to the structure a composite 2D character.…”