Abstract
The quaternary compound KCuCe2Se6 was obtained as black needlelike crystals by reacting a mixture of K2Se, Cu, Ce and Se in a 2:1:1:8 ratio at 450°C. The compound crystallizes in the orthorhombic space group Fddd with a = 8.5907(5), b = 11.3962(8) and c = 44.490(3) Å which is a superstructure of the already published structure of KCuCe2Se6 which was described in space group Immm. The Ce3+ ions are in bicapped distorted trigonal prismatic coordination of Se atoms and the Cu+ ions are in tetrahedral environment. The prisms are connected via triangular faces forming rods parallel to the crystallographic a axis. These rods are joined by one capping Se atom and one Se center of the triangular faces thus leading to the formation of anionic layers [CuCe2Se6]n n- within the ab plane. The Cu+ ions occupy only one half of the tetrahedral sites in an ordered fashion in contrast to the statistical occupation reported for the substructure. The charge balancing K+ ions are located between the anionic layers.
| Original language | English |
|---|---|
| Pages (from-to) | 421-431 |
| Number of pages | 11 |
| Journal | Solid State Sciences |
| Volume | 1 |
| Issue number | 6 |
| Publication status | Published - Aug 1999 |
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ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry
Cite this
The superstructure of KCuCe2Se6 due to ordering of copper cations. / Klawitter, Y.; Näther, C.; Jeß, I.; Bensch, W.; Kanatzidis, Mercouri G.
In: Solid State Sciences, Vol. 1, No. 6, 08.1999, p. 421-431.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - The superstructure of KCuCe2Se6 due to ordering of copper cations
AU - Klawitter, Y.
AU - Näther, C.
AU - Jeß, I.
AU - Bensch, W.
AU - Kanatzidis, Mercouri G
PY - 1999/8
Y1 - 1999/8
N2 - The quaternary compound KCuCe2Se6 was obtained as black needlelike crystals by reacting a mixture of K2Se, Cu, Ce and Se in a 2:1:1:8 ratio at 450°C. The compound crystallizes in the orthorhombic space group Fddd with a = 8.5907(5), b = 11.3962(8) and c = 44.490(3) Å which is a superstructure of the already published structure of KCuCe2Se6 which was described in space group Immm. The Ce3+ ions are in bicapped distorted trigonal prismatic coordination of Se atoms and the Cu+ ions are in tetrahedral environment. The prisms are connected via triangular faces forming rods parallel to the crystallographic a axis. These rods are joined by one capping Se atom and one Se center of the triangular faces thus leading to the formation of anionic layers [CuCe2Se6]n n- within the ab plane. The Cu+ ions occupy only one half of the tetrahedral sites in an ordered fashion in contrast to the statistical occupation reported for the substructure. The charge balancing K+ ions are located between the anionic layers.
AB - The quaternary compound KCuCe2Se6 was obtained as black needlelike crystals by reacting a mixture of K2Se, Cu, Ce and Se in a 2:1:1:8 ratio at 450°C. The compound crystallizes in the orthorhombic space group Fddd with a = 8.5907(5), b = 11.3962(8) and c = 44.490(3) Å which is a superstructure of the already published structure of KCuCe2Se6 which was described in space group Immm. The Ce3+ ions are in bicapped distorted trigonal prismatic coordination of Se atoms and the Cu+ ions are in tetrahedral environment. The prisms are connected via triangular faces forming rods parallel to the crystallographic a axis. These rods are joined by one capping Se atom and one Se center of the triangular faces thus leading to the formation of anionic layers [CuCe2Se6]n n- within the ab plane. The Cu+ ions occupy only one half of the tetrahedral sites in an ordered fashion in contrast to the statistical occupation reported for the substructure. The charge balancing K+ ions are located between the anionic layers.
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M3 - Article
VL - 1
SP - 421
EP - 431
JO - Solid State Sciences
JF - Solid State Sciences
SN - 1293-2558
IS - 6
ER -