High temperature X-ray diffraction, Raman spectroscopy and dielectric studies on yttrium orthochromites

2016 ◽  
Author(s):  
Ashish Kumar Mall ◽  
Ashish Garg ◽  
Rajeev Gupta
Keyword(s):  
Raman Spectroscopy ◽  
High Temperature ◽  
Dielectric Studies ◽  
X Ray Diffraction ◽  
X Ray

High-temperature X-ray diffraction and Raman spectroscopy of diopside and pseudowollastonite

1998 ◽  
Vol 25 (6) ◽  
pp. 401-414 ◽  
Author(s):  
Pascal Richet ◽  
Bjorn O. Mysen ◽  
Jannick Ingrin
Keyword(s):  
Raman Spectroscopy ◽  
High Temperature ◽  
X Ray Diffraction ◽  
X Ray

X-ray diffraction and Raman spectroscopy on Gd2(Ti2−yTey)O7 prepared at high pressure and high temperature

2010 ◽  
Vol 504 (2) ◽  
pp. 446-451 ◽  
Author(s):  
A.R. Heredia ◽  
M. Quintana García ◽  
J.L. Pérez Mazariego ◽  
R. Escamilla
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
X Ray Diffraction ◽  
X Ray

scholarly journals Topaz, a Potential Volatile-Carrier in Cold Subduction Zone: Constraint from Synchrotron X-ray Diffraction and Raman Spectroscopy at High Temperature and High Pressure

Minerals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 780
Author(s):  
Shijie Huang ◽  
Jingui Xu ◽  
Chunfa Chen ◽  
Bo Li ◽  
Zhilin Ye ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
High Pressure ◽  
High Temperature ◽  
Equation Of State ◽  
Subduction Zone ◽  
Upper Mantle ◽  
Vibration Modes ◽  
Volume Data ◽  
X Ray Diffraction ◽  
X Ray

The equation of state and stability of topaz at high-pressure/high-temperature conditions have been investigated by in situ synchrotron X-ray diffraction (XRD) and Raman spectroscopy in this study. No phase transition occurs on topaz over the experimental pressure–temperature (P-T) range. The pressure–volume data were fitted by the third-order Birch–Murnaghan equation of state (EoS) with the zero-pressure unit–cell volume V0 = 343.86 (9) Å3, the zero-pressure bulk modulus K0 = 172 (3) GPa, and its pressure derivative K’0 = 1.3 (4), while the obtained K0 = 155 (2) GPa when fixed K’0 = 4. In the pressure range of 0–24.4 GPa, the vibration modes of in-plane bending OH-groups for topaz show non-linear changes with the increase in pressure, while the other vibration modes show linear changes. Moreover, the temperature–volume data were fitted by Fei’s thermal equation with the thermal expansion coefficient α300 = 1.9 (1) × 10−5 K−1 at 300 K. Finally, the P-T stability of topaz was studied by a synchrotron-based single-crystal XRD at simultaneously high P-T conditions up to ~10.9 GPa and 700 K, which shows that topaz may maintain a metastable state at depths above 370 km in the upper mantle along the coldest subducting slab geotherm. Thus, topaz may be a potential volatile-carrier in the cold subduction zone. It can carry hydrogen and fluorine elements into the deep upper mantle and further affect the geochemical behavior of the upper mantle.

scholarly journals Exceptionally High Temperature Spin Crossover in Amide-Functionalised 2,6-bis(pyrazol-1-yl)pyridine Iron(II) Complex Revealed by Variable Temperature Raman Spectroscopy and Single Crystal X-ray Diffraction.

2021 ◽  
Author(s):  
Max Attwood ◽  
Hiroki Akutsu ◽  
Lee Martin ◽  
Toby J Blundell ◽  
Pierre LeMagueres ◽  
...  
Keyword(s):  
Differential Scanning Calorimetry ◽  
Raman Spectroscopy ◽  
High Temperature ◽  
Spin Crossover ◽  
Variable Temperature ◽  
Squid Magnetometry ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
X Ray ◽  
Complex Salts

The synthesis of a novel amide-functionalised 2,6-bis(pyrazol-1-yl)pyridine-4-carboxamide ligand (bppCONH2) is described. The complex salts [Fe(bppCONH2)2](BF4)2 and [Fe(bppCONH2)2](ClO4)2 were synthesised and characterised by SQUID magnetometry, differential scanning calorimetry, variable temperature Raman...

Raman spectroscopy and X-ray diffraction of lithium niobate at temperatures up to 1300○-4.80pt○C

2005 ◽  
Vol 126 ◽  
pp. 101-105 ◽  
Author(s):  
B. Moulin ◽  
L. Hennet ◽  
D. Thiaudière ◽  
P. Melin ◽  
P. Simon
Keyword(s):  
Raman Spectroscopy ◽  
Lithium Niobate ◽  
X Ray Diffraction ◽  
X Ray

High temperature X-ray diffraction investigation of an aluminium-silicon-corundum system

2007 ◽  
Vol 2007 (suppl_26) ◽  
pp. 369-374 ◽  
Author(s):  
D. Garipoli ◽  
P. Bergese ◽  
E. Bontempi ◽  
M. Minicucci ◽  
A. Di Cicco ◽  
...  
Keyword(s):  
High Temperature ◽  
X Ray Diffraction ◽  
X Ray
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