Thermal decomposition of AlH3 studied by in situ synchrotron X-ray diffraction and thermal desorption spectroscopy

2007 ◽  
Vol 446-447 ◽  
pp. 280-289 ◽  
Author(s):  
J.P. Maehlen ◽  
V.A. Yartys ◽  
R.V. Denys ◽  
M. Fichtner ◽  
Ch. Frommen ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Thermal Desorption ◽  
Thermal Desorption Spectroscopy ◽  
X Ray Diffraction ◽  
X Ray

Accelerated Thermal Decomposition of Graphene Oxide Films in Air via in Situ X-ray Diffraction Analysis

2016 ◽  
Vol 120 (27) ◽  
pp. 14984-14990 ◽  
Author(s):  
Qin Pan ◽  
Ching-Chang Chung ◽  
Nanfei He ◽  
Jacob L. Jones ◽  
Wei Gao
Keyword(s):  
Thermal Decomposition ◽  
Graphene Oxide ◽  
Diffraction Analysis ◽  
Oxide Films ◽  
X Ray Diffraction ◽  
X Ray

In Situ Diffraction Studies: Thermal Decomposition of a Natural Plumbojarosite and the Development of Rietveld-Based Data Analysis Techniques

2010 ◽  
Vol 651 ◽  
pp. 37-64 ◽  
Author(s):  
Ian C. Madsen ◽  
Ian E. Grey ◽  
Stuart J. Mills
Keyword(s):  
Thermal Decomposition ◽  
Amorphous Material ◽  
Data Sets ◽  
X Ray Diffraction ◽  
Data Set ◽  
X Ray ◽  
Analysis Techniques ◽  
Path Lengths ◽  
Instrument Configuration

A study of the thermal decomposition sequence of a sample of natural arsenian plumbojarosite has been undertaken using in situ X-ray diffraction. The sample was heated to 900°C using an Anton-Paar heating stage fitted to an INEL CPS120 diffractometer. The data were analysed using a whole-pattern, Rietveld based approach for the extraction of quantitative phase abundances. The instrument configuration used required the development and application of algorithms to correct for aberrations in the (i) peak intensities due to differing path lengths of incident and diffracted beams in the sample and (ii) peak positions due to sample displacement. Details of the structural models used were refined at selected steps in the pattern and then fixed for subsequent analysis. The data sequence consists of some 110 individual data sets which were analysed sequentially with the output of each run forming the input for analysis of the next data set. The results of the analysis show a complex breakdown and recrystallisation sequence including the formation of a major amount of amorphous material after initial breakdown of the plumbojarosite.

Probing the thermal decomposition process of layered double hydroxides through in situ 57Fe Mössbauer and in situ X-ray diffraction experiments

2006 ◽  
Vol 42 (2) ◽  
pp. 534-538 ◽  
Author(s):  
Daniel X. Gouveia ◽  
Odair P. Ferreira ◽  
Antonio G. Souza Filho ◽  
M. G. da Silva ◽  
J. A. C. de Paiva ◽  
...  
Keyword(s):  
Thermal Decomposition ◽  
Layered Double Hydroxides ◽  
Decomposition Process ◽  
X Ray Diffraction ◽  
Thermal Decomposition Process ◽  
X Ray ◽  
57Fe Mössbauer ◽  
Double Hydroxides

Synthesis and characterization of the barium oxalates BaC2O4·0.5H2O, α-BaC2O4 and β-BaC2O4

2002 ◽  
Vol 58 (5) ◽  
pp. 808-814 ◽  
Author(s):  
Axel Nørlund Christensen ◽  
Rita Grønbæk Hazell ◽  
Ian Charles Madsen
Keyword(s):  
Thermal Decomposition ◽  
Ammonium Oxalate ◽  
Barium Chloride ◽  
X Ray Diffraction ◽  
Space Group ◽  
X Ray ◽  
Weak Hydrogen Bonds ◽  
Made In

The synthesis of BaC2O4·0.5H2O and its thermal decomposition to α-BaC2O4 and β-BaC2O4 was investigated. BaC2O4·0.5H2O is precipitated at room temperature from aqueous solutions of barium chloride and ammonium oxalate. The deuterated compound BaC2O4·0.5D2O was made in analogy with D2O as the solvent. The compounds were characterized by X-ray and neutron diffraction analysis. Single-crystal X-ray diffraction of BaC2O4·0.5H2O measured at 120 K gave the triclinic cell a = 8.692 (1), b = 9.216 (1), c = 6.146 (1) Å, α = 95.094 (3), β = 95.492 (3), γ = 64.500 (3)°, space group P\bar 1, Z = 4. Two independent Ba atoms are each coordinated to nine O atoms at distances from 2.73 (1) to 2.99 (1) Å. One of the two oxalate ions deviates significantly from planarity. The water molecule does form weak hydrogen bonds. In situ X-ray powder diffraction was used to study the thermal decomposition of BaC2O4·0.5H2O and the formation of α-BaC2O4. The X-ray powder pattern of α-BaC2O4 measured at 473 K was indexed on a triclinic cell with a = 5.137 (3), b = 8.764 (6), c = 9.006 (4) Å, α = 83.57 (4), β = 98.68 (5), γ = 99.53 (5)°, and the space group P\bar 1 with Z = 4.

scholarly journals In situ X-ray diffraction investigation of thermal decomposition of wood cellulose

2007 ◽  
Vol 80 (1) ◽  
pp. 134-140 ◽  
Author(s):  
Gerald A. Zickler ◽  
Wolfgang Wagermaier ◽  
Sérgio S. Funari ◽  
Manfred Burghammer ◽  
Oskar Paris
Keyword(s):  
Thermal Decomposition ◽  
X Ray Diffraction ◽  
Wood Cellulose ◽  
X Ray

In Situ Synchrotron Powder X-ray Diffraction Studies of the Thermal Decomposition of β- and γ-AlD3

2007 ◽  
Vol 111 (44) ◽  
pp. 16693-16699 ◽  
Author(s):  
Hilde Grove ◽  
Magnus H. Sørby ◽  
Hendrik W. Brinks ◽  
Bjørn C. Hauback
Keyword(s):  
Thermal Decomposition ◽  
X Ray Diffraction ◽  
X Ray
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