Pressure induced phase transition of Scandium under ultra-high pressure
Inquiry number
SOL-0000001127
Beamline
BL10XU (High Pressure Research)
Scientific keywords
| A. Sample category | inorganic material |
|---|---|
| B. Sample category (detail) | metal, alloy |
| C. Technique | X-ray diffraction |
| D. Technique (detail) | powder diffraction |
| E. Particular condition | microbeam (> 10 µm), high pressure (DAC) |
| F. Photon energy | X-ray (4-40 keV) |
| G. Target information | crystal structure, phase transition |
Industrial keywords
| level 1---Application area | industrial material, others |
|---|---|
| level 2---Target | |
| level 3---Target (detail) | |
| level 4---Obtainable information | density, crystal structure, electronic state, elastic modulus |
| level 5---Technique | diffraction |
Classification
A80.20 metal ・material, M10.20 powder diffraction
Body text
X-ray diffraction experiments were carried out in order to study structural phase transition of the trivalent rare-earth metal scandium (Sc) at pressures up to 300GPa. Figure shows the existence of four stages of structural transition. The crystal structure of the highest pressure phase, Sc-V, was revealed to be a hexagonal lattice consisting of 6-screw helical chains.
Figure.Structure of Sc-V and the change of the atomic volume for Sc.
[ Y. Akahama, H. Fujihisa and H. Kawamura, Physical Review Letters 94, 195503 (2005), Fig. 3, 4,
©2005 American Physical Society ]
Source of the figure
Original paper/Journal article
Journal title
PRL, 94(2005)195503
Figure No.
3,4
Technique
The high pressure research beamline BL10XU is designed to perform the X-ray diffraction structure analysis under high-pressure and low/high temperature, using the high brilliance X-rays from the in-vacuum type undulator. The monochromatic and focused X-rays irradiate the sample enclosed in a DAC system, which can generate the pressure up to 300 GPa. The most of the conventional limitations (extremely small size sample area (<100mm), limited diffraction windows, x-ray absorption by diamond and so on) for the DAC high pressure diffraction experiment was extended and upgraded to the high resolution, high angular resolution and high counting statistics diffraction experiment as well as rapid data measurement.
Source of the figure
Presentation material for Beamline Report
Required time for experimental setup
4 hour(s)
Instruments
| Instrument | Purpose | Performance |
|---|---|---|
| DAC diffractometer | high pressure x-ray diffraction | <300GPa x-ray diffraction measurement |
References
Related experimental techniques
powder x-ray diffraction, single crystal x-ray diffraction
Questionnaire
The measurement was possible only in SPring-8. Impossible or very difficult in other facilities.
This solution is an application of a main instrument of the beamline.
Ease of measurement
With a great skill
Ease of analysis
Middle
How many shifts were needed for taking whole data in the figure?
More than ten shifts