Two new binary lanthanide polytellurides: Syntheses and crystal structures of CeTe1.90 and SmTe1.80

Ismail Ijjaali; James A. Ibers

doi:10.1016/j.jssc.2006.07.010

Two new binary lanthanide polytellurides: Syntheses and crystal structures of CeTe_1.90 and SmTe_1.80

Ismail Ijjaali, James A. Ibers^*

^*Corresponding author for this work

Chemistry

Research output: Contribution to journal › Article › peer-review

15 Scopus citations

Abstract

Single crystals of the new binaries CeTe_1.90 and SmTe_1.80 have been obtained. CeTe_1.90 was synthesized at 1023 K from the reaction of Ce, TeO₂, and Te with the use of a CsCl flux. It crystallizes in the tetragonal space group P4₂/n with 20 formula units in a cell of dimensions at 153 K of a = 10.0261 (5), c = 18.1336 (12) Å, V = 1822.84 (18) Å³. It is isostructural with the LnSe_1.9 polyselenides (Ln=La, Ce, Pr) and with SmS_1.90. SmTe_1.80 was synthesized at 1223 K from the reaction of Sm and Te in a KBr flux. SmTe_1.80 crystallizes in a new structural type in the tetragonal space group P4/n with 20 formula units in a cell of dimensions at 153 K of a = 9.7026 (4), c = 18.0072 (14) Å, V = 1695.21 (14) Å³. Both of these layered structures, which may be derived from the ZrSiS structure type, consist of double layers of [LnTe] polyhedra separated by planar Te nets that contain vacancies. In these nets the shortest Te-Te distances are 2.9194(5), 3.1204(5), and 3.3324(6) Å in CeTe_1.90 and 2.878(1), 2.9932(3), and 3.2114(7) Å in SmTe_1.80. Neither a simple delineation of the Te-Te bonding nor an assignment of individual formal oxidation states is possible in either of these compounds if one takes strict account of the Te-Te distances.

Original language	English (US)
Pages (from-to)	3456-3460
Number of pages	5
Journal	Journal of Solid State Chemistry
Volume	179
Issue number	11
DOIs	https://doi.org/10.1016/j.jssc.2006.07.010
State	Published - Nov 2006

Keywords

Binary lanthanide polytelluride
Crystal structure
Hypostoichiometry
Synthesis

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

Access to Document

10.1016/j.jssc.2006.07.010

Cite this

@article{171e0678624c47ab946926673923e9d7,

title = "Two new binary lanthanide polytellurides: Syntheses and crystal structures of CeTe1.90 and SmTe1.80",

abstract = "Single crystals of the new binaries CeTe1.90 and SmTe1.80 have been obtained. CeTe1.90 was synthesized at 1023 K from the reaction of Ce, TeO2, and Te with the use of a CsCl flux. It crystallizes in the tetragonal space group P42/n with 20 formula units in a cell of dimensions at 153 K of a = 10.0261 (5), c = 18.1336 (12) {\AA}, V = 1822.84 (18) {\AA}3. It is isostructural with the LnSe1.9 polyselenides (Ln=La, Ce, Pr) and with SmS1.90. SmTe1.80 was synthesized at 1223 K from the reaction of Sm and Te in a KBr flux. SmTe1.80 crystallizes in a new structural type in the tetragonal space group P4/n with 20 formula units in a cell of dimensions at 153 K of a = 9.7026 (4), c = 18.0072 (14) {\AA}, V = 1695.21 (14) {\AA}3. Both of these layered structures, which may be derived from the ZrSiS structure type, consist of double layers of [LnTe] polyhedra separated by planar Te nets that contain vacancies. In these nets the shortest Te-Te distances are 2.9194(5), 3.1204(5), and 3.3324(6) {\AA} in CeTe1.90 and 2.878(1), 2.9932(3), and 3.2114(7) {\AA} in SmTe1.80. Neither a simple delineation of the Te-Te bonding nor an assignment of individual formal oxidation states is possible in either of these compounds if one takes strict account of the Te-Te distances.",

keywords = "Binary lanthanide polytelluride, Crystal structure, Hypostoichiometry, Synthesis",

author = "Ismail Ijjaali and Ibers, {James A.}",

note = "Funding Information: Use was made of the MRL Central Facilities supported by the National Science Foundation at the Materials Research Center of Northwestern University under Grant No. DMR00-76097. ",

year = "2006",

month = nov,

doi = "10.1016/j.jssc.2006.07.010",

language = "English (US)",

volume = "179",

pages = "3456--3460",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

number = "11",

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TY - JOUR

T1 - Two new binary lanthanide polytellurides

T2 - Syntheses and crystal structures of CeTe1.90 and SmTe1.80

AU - Ijjaali, Ismail

AU - Ibers, James A.

N1 - Funding Information: Use was made of the MRL Central Facilities supported by the National Science Foundation at the Materials Research Center of Northwestern University under Grant No. DMR00-76097.

PY - 2006/11

Y1 - 2006/11

N2 - Single crystals of the new binaries CeTe1.90 and SmTe1.80 have been obtained. CeTe1.90 was synthesized at 1023 K from the reaction of Ce, TeO2, and Te with the use of a CsCl flux. It crystallizes in the tetragonal space group P42/n with 20 formula units in a cell of dimensions at 153 K of a = 10.0261 (5), c = 18.1336 (12) Å, V = 1822.84 (18) Å3. It is isostructural with the LnSe1.9 polyselenides (Ln=La, Ce, Pr) and with SmS1.90. SmTe1.80 was synthesized at 1223 K from the reaction of Sm and Te in a KBr flux. SmTe1.80 crystallizes in a new structural type in the tetragonal space group P4/n with 20 formula units in a cell of dimensions at 153 K of a = 9.7026 (4), c = 18.0072 (14) Å, V = 1695.21 (14) Å3. Both of these layered structures, which may be derived from the ZrSiS structure type, consist of double layers of [LnTe] polyhedra separated by planar Te nets that contain vacancies. In these nets the shortest Te-Te distances are 2.9194(5), 3.1204(5), and 3.3324(6) Å in CeTe1.90 and 2.878(1), 2.9932(3), and 3.2114(7) Å in SmTe1.80. Neither a simple delineation of the Te-Te bonding nor an assignment of individual formal oxidation states is possible in either of these compounds if one takes strict account of the Te-Te distances.

AB - Single crystals of the new binaries CeTe1.90 and SmTe1.80 have been obtained. CeTe1.90 was synthesized at 1023 K from the reaction of Ce, TeO2, and Te with the use of a CsCl flux. It crystallizes in the tetragonal space group P42/n with 20 formula units in a cell of dimensions at 153 K of a = 10.0261 (5), c = 18.1336 (12) Å, V = 1822.84 (18) Å3. It is isostructural with the LnSe1.9 polyselenides (Ln=La, Ce, Pr) and with SmS1.90. SmTe1.80 was synthesized at 1223 K from the reaction of Sm and Te in a KBr flux. SmTe1.80 crystallizes in a new structural type in the tetragonal space group P4/n with 20 formula units in a cell of dimensions at 153 K of a = 9.7026 (4), c = 18.0072 (14) Å, V = 1695.21 (14) Å3. Both of these layered structures, which may be derived from the ZrSiS structure type, consist of double layers of [LnTe] polyhedra separated by planar Te nets that contain vacancies. In these nets the shortest Te-Te distances are 2.9194(5), 3.1204(5), and 3.3324(6) Å in CeTe1.90 and 2.878(1), 2.9932(3), and 3.2114(7) Å in SmTe1.80. Neither a simple delineation of the Te-Te bonding nor an assignment of individual formal oxidation states is possible in either of these compounds if one takes strict account of the Te-Te distances.

KW - Binary lanthanide polytelluride

KW - Crystal structure

KW - Hypostoichiometry

KW - Synthesis

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