Martensitic Transformation of Ni<SUB>2.18</SUB>Mn<SUB>0.82</SUB>Ga Single Crystal Observed by Synchrotron Radiation White X-Ray Diffraction

A Heusler-type Ni2.18Mn0.82Ga single crystal shows a shape memory effect. It makes a thermo-elastic martensitic transformation at around 340 K, which is coincident with a Curie temperature. We made a synchrotron radiation white X-ray diffraction of the single crystal by changing the temperature from 400 K to 103 K. We observed the change of Laue spots following the transformation. As a result of experiment, the single crystal shows one cubic Heusler structure at 400 K. The direction of the crystal growth is along cubic [010] direction. In the process of decreasing temperature, many tetragonal structures with small volume of different axial direction become to appear. At room temperature the transformation almost finishes and two tetragonal Heusler structures which are twin each other remain. One of them is nearly the same as the structure at the beginning room temperature. The direction of the crystal growth is [010] of this tetragonal structure. We found that the twinning plane of the tetragonal structure is (011) plane.

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Refinement of the crystal structure of sieleckiite and revision of its symmetry

Mineralogical Magazine ◽

10.1180/minmag.2016.080.143 ◽

2017 ◽

Vol 81 (4) ◽

pp. 917-922

Author(s):

Peter Elliott

Keyword(s):

Crystal Structure ◽

Synchrotron Radiation ◽

Single Crystal ◽

Diffraction Data ◽

X Ray Diffraction ◽

Aluminium Phosphate ◽

Unit Cell Parameters ◽

X Ray ◽

Cell Parameters ◽

Phosphate Mineral

AbstractThe crystal structure of the copper aluminium phosphate mineral sieleckiite, Cu3Al4(PO4)2 (OH)12·2H2O, from the Mt Oxide copper mine, Queensland, Australia was solved from single-crystal X-ray diffraction data utilizing synchrotron radiation. Sieleckiite has monoclinic rather than triclinic symmetry as previously reported and is space group C2/m with unit-cell parameters a = 11.711(2), b = 6.9233(14), c = 9.828(2) Å, β = 92.88(3)°, V = 795.8(3) Å3and Z = 2. The crystal structure, which has been refined to R1 = 0.0456 on the basis of 1186 unique reflections with Fo > 4σF, is a framework of corner-, edge- and face- sharing Cu and Al octahedra and PO4 tetrahedra.

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In-situ Observation of Zinc Electrodeposition on Iron Single Crystal Using Synchrotron Radiation X-ray Diffraction

Tetsu-to-Hagane ◽

10.2355/tetsutohagane1955.89.1_54 ◽

2003 ◽

Vol 89 (1) ◽

pp. 54-59 ◽

Cited By ~ 3

Author(s):

Masao KUROSAKI ◽

Muneyuki IMAFUKU ◽

Koichi KAWASAKI

Keyword(s):

Synchrotron Radiation ◽

Single Crystal ◽

X Ray Diffraction ◽

X Ray ◽

Zinc Electrodeposition ◽

Iron Single Crystal

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Synchrotron radiation study of yttria-stabilized zirconia, Zr0.758Y0.242O1.879

Acta Crystallographica Section B Structural Science ◽

10.1107/s0108768199005108 ◽

1999 ◽

Vol 55 (5) ◽

pp. 726-735 ◽

Cited By ~ 26

Author(s):

N. Ishizawa ◽

Y. Matsushima ◽

M. Hayashi ◽

M. Ueki

Keyword(s):

Synchrotron Radiation ◽

Single Crystal ◽

Yttria Stabilized Zirconia ◽

Data Sets ◽

X Ray Diffraction ◽

Stabilized Zirconia ◽

X Ray ◽

Ideal Position ◽

Fluorite Type ◽

The Ideal

The fluorite-related cubic structure of yttria-stabilized zirconia, Zr0.75 8Y0.24 2O1.87 9, has been studied by single-crystal X-ray diffraction using synchrotron radiation and by EXAFS. Two diffraction data sets obtained at X-ray energies of 512 and 10 eV below the Y K edge revealed that in the average structure Zr atoms are displaced from the origin of the space group Fm3¯m along 〈111〉 by 0.19 Å, while Y atoms reside at the origin. Approximately 48% of the O atoms occupy the ideal position in the fluorite-type structure, while 43% of O atoms are displaced from the ideal position along 〈001〉 by 0.31 Å. The remaining 9% of O atoms are presumably sited at interstitial positions. Local structures around Zr and Y are investigated by combining the results of single-crystal X-ray diffraction and EXAFS studies.

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Single-crystal structure analysis of designer drugs circulating in the Japanese drug market by the synchrotron radiation X-ray diffraction

Powder Diffraction ◽

10.1017/s0885715617000379 ◽

2017 ◽

Vol 32 (2) ◽

pp. 112-117

Author(s):

Takashi Hashimoto ◽

Ruri Hanajiri ◽

Nobuhiro Yasuda ◽

Yuki Nakamura ◽

Nobuhiro Mizuno ◽

...

Keyword(s):

Crystal Structure ◽

Synchrotron Radiation ◽

Single Crystal ◽

Drug Market ◽

Crystal Structure Analysis ◽

Single Crystal Structure ◽

Designer Drugs ◽

X Ray Diffraction ◽

Molecular Configuration ◽

X Ray

Over the past 20 years, many designer drugs derived from controlled substances have been widely distributed as easily available psychoactive substances and have become a serious problem in Japan. In order to determine the absolute structures of four new designer drugs derived from medicines (methylphenidate and phenmetrazine) X-ray single-crystal structure analyses were performed using the BL26B1 beamline of synchrotron radiation facility SPring-8. The results show that the molecular configuration of these designer drugs (having two asymmetric carbons), which were distributed in the illegal drug market had threo-forms as found for methylphenidate and phenmetrazine.

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