VERIFICATION OF THE STABILITY OF MODIFIED SPINEL STRUCTURE BY MEANS OF HIGH-PRESSURE AND HIGH-TEMPERATURE X-RAY ANALYSIS

AbstractThe mixed cation triel borate Ga4In4B15O33(OH)3 was synthesized in a Walker-type multianvil apparatus at high-pressure/high-temperature conditions of 12.5 GPa and 1300°C. Although the product could not be reproduced in further experiments, its crystal structure could be reliably determined via single-crystal X-ray diffraction data. Ga4In4B15O33(OH)3 crystallizes in the tetragonal space group I41/a (origin choice 2) with the lattice parameters a = 11.382(2), c = 15.244(2) Å, and V = 1974.9(4) Å3. The structure of the quaternary triel borate consists of a complex network of BO4 tetrahedra, edge-sharing InO6 octahedra in dinuclear units, and very dense edge-sharing GaO6 octahedra in tetranuclear units.

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Continuous measurement of ultrasonic elastic wave velocities, X-ray radiography and X-ray diffraction of Zr50Cu40Al10 metallic glass at high pressure and high temperature conditions

High Pressure Research ◽

10.1080/08957959.2021.1941000 ◽

2021 ◽

pp. 1-14

Author(s):

Yoshio Kono ◽

Yuji Higo ◽

Steeve Gréaux ◽

Yuki Shibazaki ◽

Rui Yamada ◽

...

Keyword(s):

High Pressure ◽

High Temperature ◽

Metallic Glass ◽

Elastic Wave ◽

Continuous Measurement ◽

X Ray Diffraction ◽

X Ray ◽

Wave Velocities ◽

Temperature Conditions

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High-pressure synthesis and characterization of the non-centrosymmetric scandium borate ScB6O9(OH)3

Zeitschrift für Naturforschung B ◽

10.1515/znb-2020-0070 ◽

2020 ◽

Vol 75 (6-7) ◽

pp. 597-603

Author(s):

Birgit Fuchs ◽

Hubert Huppertz

Keyword(s):

High Pressure ◽

High Temperature ◽

Synthesis And Characterization ◽

X Ray Diffraction ◽

X Ray ◽

High Pressure High Temperature ◽

Structure Solution ◽

Temperature Experiment ◽

Pressure Synthesis

AbstractThe non-centrosymmetric scandium borate ScB6O9(OH)3 was obtained through a high-pressure/high-temperature experiment at 6 GPa and 1473 K. Single-crystal X-ray diffraction revealed that the structure is isotypic to InB6O9(OH)3 containing borate triple layers separated by scandium layers. The compound crystallizes in the space group Fdd2 with the lattice parameters a = 38.935(4), b = 4.4136(4), and c = 7.6342(6) Å. Powder X-ray diffraction and vibrational spectroscopy were used to further characterize the compound and verify the proposed structure solution.

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The high-pressure cadmium borate Cd6B22O39·H2O

Zeitschrift für Naturforschung B ◽

10.1515/znb-2014-0243 ◽

2015 ◽

Vol 70 (3) ◽

pp. 183-190 ◽

Cited By ~ 3

Author(s):

Gerhard Sohr ◽

Nina Ciaghi ◽

Klaus Wurst ◽

Hubert Huppertz

Keyword(s):

High Pressure ◽

High Temperature ◽

Structural Characteristics ◽

X Ray Diffraction ◽

X Ray ◽

High Pressure High Temperature ◽

Cell Dimensions ◽

Temperature Experiment ◽

Unit Cell Dimensions ◽

Ir And Raman

AbstractSingle crystals of the hydrous cadmium borate Cd6B22O39·H2O were obtained through a high-pressure/high-temperature experiment at 4.7 GPa and 1000 °C using a Walker-type multianvil apparatus. CdO and partially hydrolyzed B2O3 were used as starting materials. A single crystal X-ray diffraction study has revealed that the structure of Cd6B22O39·H2O is similar to that of the type M6B22O39·H2O (M=Fe, Co). Layers of corner-sharing BO4 groups are interconnected by BO3 groups to form channels containing the metal cations, which are six- and eight-fold coordinated by oxygen atoms. The compound crystallizes in the space group Pnma (no. 62) [R1=0.0379, wR2=0.0552 (all data)] with the unit cell dimensions a=1837.79(5), b=777.92(2), c=819.08(3) pm, and V=1171.00(6) Å3. The IR and Raman spectra reflect the structural characteristics of Cd6B22O39·H2O.

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