Abstract
The ternary phase, CuxUTe3 (x = 0.25 and 0.33), was synthesized from a 3/1/4 mixture of Cu/U/Te that was heated to 800 °C for 6 days and cooled at a rate of -4 °C h-1. It adopts the monoclinic space group P21/m with a = 6.0838(12) Å, b = 4.2140(8) Å, c = 10.361(2) Å, β = 98.83(3)°, and V = 262.47(9) Å3 (for x ∼ 0.25). The structure is built from UTe3 layers of ZrSe3-type that are connected in the [001] direction by Cu atoms. The Cu atoms stabilize α-UTe3 by inserting between the layers. CuxUTe3 can be prepared rationally via a soft chemistry route by reaction of Cu with α-UTe3. The structural analysis suggests the presence of straight chains of Te atoms (∼3.0 Å apart) along the a-axis but this is an artifact as shown by electron diffraction studies of CuxUTe3 that indicate the existence of a supercell along the a-axis. Pair distribution function analysis (PDF) was used to show that the Te-Te chains contain Te-Te dimers at 2.74 Å. Charge transport measurements suggest a narrow gap semiconductor but they also indicate anomalous behavior as a function of temperature with a n-type to p-type transition at ∼40 K.
| Original language | English |
|---|---|
| Pages (from-to) | 4755-4762 |
| Number of pages | 8 |
| Journal | Journal of the American Chemical Society |
| Volume | 123 |
| Issue number | 20 |
| DOIs | |
| Publication status | Published - 2001 |
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ASJC Scopus subject areas
- Chemistry(all)
Cite this
CuxUTe3 : Stabilization of UTe3 in the ZrSe3 structure type via copper insertion. The artifact of Te-Te chains and evidence for distortions due to long range modulations. / Patschke, R.; Breshears, J. D.; Brazis, P.; Kannewurf, C. R.; Billinge, S. J L; Kanatzidis, Mercouri G.
In: Journal of the American Chemical Society, Vol. 123, No. 20, 2001, p. 4755-4762.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - CuxUTe3
T2 - Stabilization of UTe3 in the ZrSe3 structure type via copper insertion. The artifact of Te-Te chains and evidence for distortions due to long range modulations
AU - Patschke, R.
AU - Breshears, J. D.
AU - Brazis, P.
AU - Kannewurf, C. R.
AU - Billinge, S. J L
AU - Kanatzidis, Mercouri G
PY - 2001
Y1 - 2001
N2 - The ternary phase, CuxUTe3 (x = 0.25 and 0.33), was synthesized from a 3/1/4 mixture of Cu/U/Te that was heated to 800 °C for 6 days and cooled at a rate of -4 °C h-1. It adopts the monoclinic space group P21/m with a = 6.0838(12) Å, b = 4.2140(8) Å, c = 10.361(2) Å, β = 98.83(3)°, and V = 262.47(9) Å3 (for x ∼ 0.25). The structure is built from UTe3 layers of ZrSe3-type that are connected in the [001] direction by Cu atoms. The Cu atoms stabilize α-UTe3 by inserting between the layers. CuxUTe3 can be prepared rationally via a soft chemistry route by reaction of Cu with α-UTe3. The structural analysis suggests the presence of straight chains of Te atoms (∼3.0 Å apart) along the a-axis but this is an artifact as shown by electron diffraction studies of CuxUTe3 that indicate the existence of a supercell along the a-axis. Pair distribution function analysis (PDF) was used to show that the Te-Te chains contain Te-Te dimers at 2.74 Å. Charge transport measurements suggest a narrow gap semiconductor but they also indicate anomalous behavior as a function of temperature with a n-type to p-type transition at ∼40 K.
AB - The ternary phase, CuxUTe3 (x = 0.25 and 0.33), was synthesized from a 3/1/4 mixture of Cu/U/Te that was heated to 800 °C for 6 days and cooled at a rate of -4 °C h-1. It adopts the monoclinic space group P21/m with a = 6.0838(12) Å, b = 4.2140(8) Å, c = 10.361(2) Å, β = 98.83(3)°, and V = 262.47(9) Å3 (for x ∼ 0.25). The structure is built from UTe3 layers of ZrSe3-type that are connected in the [001] direction by Cu atoms. The Cu atoms stabilize α-UTe3 by inserting between the layers. CuxUTe3 can be prepared rationally via a soft chemistry route by reaction of Cu with α-UTe3. The structural analysis suggests the presence of straight chains of Te atoms (∼3.0 Å apart) along the a-axis but this is an artifact as shown by electron diffraction studies of CuxUTe3 that indicate the existence of a supercell along the a-axis. Pair distribution function analysis (PDF) was used to show that the Te-Te chains contain Te-Te dimers at 2.74 Å. Charge transport measurements suggest a narrow gap semiconductor but they also indicate anomalous behavior as a function of temperature with a n-type to p-type transition at ∼40 K.
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U2 - 10.1021/ja0042534
DO - 10.1021/ja0042534
M3 - Article
VL - 123
SP - 4755
EP - 4762
JO - Journal of the American Chemical Society
JF - Journal of the American Chemical Society
SN - 0002-7863
IS - 20
ER -