High-pressure behavior of thiospinel CuCr2S4

Alvaro, Matteo; Nestola, Fabrizio; Ross, Nancy L.; Domeneghetti, M. Chiara; Reznitsky, L. Z.

doi:10.2138/am.2014.4689

Cited by 4 publications

(7 citation statements)

References 43 publications

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“…For the remaining compounds, the electronic transition roughly coincides with the Fd3 m -I4 1 /amd structural change as we mentioned before, hence becoming difficult to determine if such isostructural transitions are a general feature of this series. Interestingly, we note that a peculiar F-f E plot was recently reported for the Fd3 m phase of a natural CuCr 1.7 V 0.03 S 4 sample 74 . Even though this behavior was attributed to a unique signature of a fourth-order B-M EoS for describing the respective P-V data, it would be interesting to check whether an isostructural/electronic transition is also at play in this system.…”

Section: Comparison With Relevant Cr-spinelssupporting

confidence: 69%

“…Interestingly, we note that a peculiar F−f E plot was recently reported for the Fd3̅ m phase of a natural CuCr 1.7 V 0.03 S 4 sample. 74 Even though this behavior was attributed to a unique signature of a fourthorder B−M EoS for describing the respective P−V data, it would be interesting to check whether an isostructural/ electronic transition is also at play in this system.…”

Section: Resultsmentioning

confidence: 99%

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Structural Behavior of ZnCr₂S₄ Spinel under Pressure

et al. 2016

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The series of Cr-chalcogenide spinels ACr 2 X 4 (A = Zn, Cd, Hg; X = S, Se) exhibits a rich phase diagram upon compression, as revealed by our recent investigations. There exist, however, some open questions regarding the role of cations in the observed structural transitions. In order to address these queries, we have performed X-ray diffraction and Raman spectroscopic studies on the ZnCr 2 S 4 spinel up to 42 GPa, chosen mainly due to the similarity of the Zn 2+ and Cr

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Section: Comparison With Relevant Cr-spinelssupporting

confidence: 69%

Section: Resultsmentioning

confidence: 99%

Structural Behavior of ZnCr₂S₄ Spinel under Pressure

et al. 2016

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“…The user can define each EoS independently, by selecting the EoS type from the pull-down menus, selecting the order of the EoSs and The main window of the EosFit7-GUI program, showing the control tabs in the left-hand zone and the graphics zone for plotting. The compression data are a thiospinel, CuCr 2 S 4 (Alvaro et al, 2014), with the fits of second-(black), third-(red) and fouth-order (green) Birch-Murnaghan EoS shown as lines. The same data and fits are also shown as f-F plots in Fig.…”

Section: Defining and Fitting Eossmentioning

confidence: 99%

EosFit7-GUI: a new graphical user interface for equation of state calculations, analyses and teaching

et al. 2016

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EosFit7-GUI is a full graphical user interface designed to simplify the analysis of thermal expansion and equations of state (EoSs). The software allows users to easily perform least-squares fitting of EoS parameters to diffraction data collected as a function of varying pressure, temperature or both. It has been especially designed to allow rapid graphical evaluation of both parametric data and the EoS fitted to the data, making it useful both for data analysis and for teaching.

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“…Furthermore, a single-crystal X-ray diffraction (XRD) study on a natural CuCr 1.7 V 0.3 S 4 sample did not indicate any structural transition up to 7 GPa. 27 Our high-pressure powder XRD studies have revealed a divergence in the structural behavior of the two materials under compression. In particular, CuCr 2 O 4 retains its starting I4 1 /amd structure up to 50 GPa, with evidence of a second-order isostructural transition between 24 and 30 GPa.…”

Section: Introductionmentioning

confidence: 85%

“…To date, the only pressure-related studies on these two compounds have dealt with the pressure dependence of T C . , In particular, the rate of pressure change was d T C /d P = −4.1 K/GPa, and d T C /d P = +1.6–2 K/GPa for CuCr 2 Se 4 and CuCr 2 O 4 , respectively; , no structural data have been reported. Furthermore, a single-crystal X-ray diffraction (XRD) study on a natural CuCr 1.7 V 0.3 S 4 sample did not indicate any structural transition up to 7 GPa …”

Section: Introductionmentioning

confidence: 98%

Comparing the Pressure-Induced Structural Behavior of CuCr₂O₄ and CuCr₂Se₄ Spinels

et al. 2017

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We have conducted high-pressure measurements on the CuCr 2 O 4 and CuCr 2 Se 4 spinels to unravel the structural systematics of these materials under compression. Our studies have revealed diverse structural behavior in these two compounds. In particular, CuCr 2 O 4 retains its ambient-pressure I4 1 /amd structure up to 50 GPa. Close inspection of the lattice and interatomic parameters reveals a compressibility change near 23 GPa, which is accompanied by an expansion of the apical Cr−O bond distances. We speculate that an outer Cr 3+ 3d orbital reorientation might be at play in this system, manifesting as the change in compressibility at that pressure point. On the other hand, CuCr 2 Se 4 undergoes a structural transformation from the starting Fd3̅ m phase toward a monoclinic structure initiated at ∼8 GPa and completed at ∼20 GPa. This highpressure behavior resembles that of ZnCr 2 Se 4 , and it appears that, unlike similar chalcogenide Cr spinels, steric effects take a leading role in this pressure-induced Fd3̅ m → monoclinic transition. Close comparison of our results with the reported literature yields significant insights behind the pressure-induced structural systematics of this important family of materials, thus both allowing for the careful manipulation of the structural/physical properties of these systems by strain and promoting our understanding of similar pressure-induced effects in relevant systems.

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High-pressure behavior of thiospinel CuCr2S4

Cited by 4 publications

References 43 publications

Structural Behavior of ZnCr₂S₄ Spinel under Pressure

Structural Behavior of ZnCr₂S₄ Spinel under Pressure

EosFit7-GUI: a new graphical user interface for equation of state calculations, analyses and teaching

Comparing the Pressure-Induced Structural Behavior of CuCr₂O₄ and CuCr₂Se₄ Spinels

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High-pressure behavior of thiospinel CuCr2S4

Cited by 4 publications

References 43 publications

Structural Behavior of ZnCr2S4 Spinel under Pressure

Structural Behavior of ZnCr2S4 Spinel under Pressure

EosFit7-GUI: a new graphical user interface for equation of state calculations, analyses and teaching

Comparing the Pressure-Induced Structural Behavior of CuCr2O4 and CuCr2Se4 Spinels

Contact Info

Product

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Structural Behavior of ZnCr₂S₄ Spinel under Pressure

Structural Behavior of ZnCr₂S₄ Spinel under Pressure

Comparing the Pressure-Induced Structural Behavior of CuCr₂O₄ and CuCr₂Se₄ Spinels