SPring-8, the large synchrotron radiation facility

Inquiry number

SOL-0000001121

Beamline

BL10XU (High Pressure Research)

Scientific keywords

A. Sample category	inorganic material
B. Sample category (detail)	crystal, neutral molecule
C. Technique	X-ray diffraction
D. Technique (detail)	powder diffraction
E. Particular condition	microbeam (> 10 µm), high pressure (DAC), low-T (~ liquid N2)
F. Photon energy	X-ray (4-40 keV)
G. Target information	crystal structure, structural change

Industrial keywords

level 1---Application area	cell (battery), industrial material
level 2---Target	fuel cell
level 3---Target (detail)
level 4---Obtainable information	density, crystal structure, elastic modulus
level 5---Technique	diffraction

Classification

A80.42 energy, resource, M10.20 powder diffraction

Body text

The powder diffraction technique of the BL10XU was applied to hydrogen, that is the most light element . Figure shows the powder diffraction patterns of solid hydrogen (deuterium, D₂) were collected at pressure up to 94 GPa and at low-temperature (84K). Reflections from solid deuterium could be recorded as clear diffraction lines on a image-plate detector. The integrated one-dimensional diffraction patterns were well assigned to 100 and 101 lines of hcp structure and the volume compression were observed from these data. Ability of powder diffraction technique also has been proved in this experiment (H. Kawamura et al., Solid State Communication, 119(2001)29).

Figure. The diffraction image under pressure (94GPa) and volume compression of D₂.

[ H. Kawamura, Y. Akahama,S. Umemoto, K. Takemura, Y. Ohishi and O. Shimomura, Solid State Comｍunication 119, 29-32 (2001), Fig. 3, 4,
©2001 Elsevier Science Publisher ]

Source of the figure

Original paper/Journal article

Journal title

Solid State Comunication, 119(2001)29

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.

Figure. The diamond anvil cell (DAC)

Source of the figure

Presentation material for Beamline Report

Required time for experimental setup

1 shift(s)

Instruments

Instrument	Purpose	Performance
DAC diffractometer	high pressure x-ray diffraction	<300GPa x-ray diffraction measurement
DAC cryostat	high pressure/low temperature	100GPa, 10K

References

Related experimental techniques

powder x-ray diffraction, single crystal x-ray diffraction, neutron 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.
Similar experiments account for more than 30% of the beamline's subject.

Ease of measurement

Middle

Ease of analysis

Easy

How many shifts were needed for taking whole data in the figure?

Four-nine shifts