Structure determination of thermal decomposition products from laboratory X-ray powder diffraction

2004 ◽  
Vol 219 (12) ◽  
Author(s):  
Thierry Bataille ◽  
Nathalie Audebrand ◽  
Ali Boultif ◽  
Daniel Louër
Keyword(s):  
Thermal Decomposition ◽  
Powder Diffraction ◽  
Structure Determination ◽  
Decomposition Products ◽  
X Ray ◽  
Thermal Decomposition Products

Abstract

Structure determination of anhydrous acid strontium oxalate by conventional X-ray powder diffraction

2001 ◽  
Vol 16 (4) ◽  
pp. 224-226 ◽  
Author(s):  
G. Vanhoyland ◽  
M. K. Van Bael ◽  
J. Mullens ◽  
L. C. Van Poucke
Keyword(s):  
Thermal Decomposition ◽  
Water Content ◽  
Powder Diffraction ◽  
Structure Determination ◽  
Two Dimensional ◽  
Unit Cell Parameters ◽  
X Ray ◽  
Cell Parameters ◽  
Corrected Data

The anhydrous acid strontium oxalate Sr(HC2O4)⋅½(C2O4) was obtained by thermal decomposition of the hydrated acid strontium oxalate Sr(HC2O4)⋅½(C2O4)⋅H2O. This non-hygroscopic compound crystallizes in the space group P 21/c (No. 14) with unit cell parameters: a=0.796 61(7) nm, b=0.9205(1) nm, c=0.731 98(8) nm, and β=102.104(8)°. Final refinement of the X-ray powder data yielded RB=3.2% and Rwp=11.1% (background-corrected data). In this structure, Sr is eight-fold coordinated by O. These polyhedra are connected together by edge-sharing to form two-dimensional (2D) layers along the bc-plane, which means that there is an increased dimensionality from 1D to 2D with decreasing water content of the acid oxalates.

The ab initio structure determination of [(CH3)4N]2Ge4MnS10 from X-ray powder diffraction data

1995 ◽  
Vol 219 (1-2) ◽  
pp. 111-115 ◽  
Author(s):  
O. Achak ◽  
J.Y. Pivan ◽  
M. Maunaye ◽  
M. Louër ◽  
D. Louër
Keyword(s):  
Ab Initio ◽  
Powder Diffraction ◽  
Diffraction Data ◽  
Structure Determination ◽  
Powder Diffraction Data ◽  
X Ray ◽  
Ab Initio Structure

scholarly journals STUDY OF THERMAL DECOMPOSITION PRODUCTS OF NITROGEN-PHOSPHORUS-POTASSIUM FERTILIZERS BASED ON AMMONIUM NITRATE BY X-RAY DIFFRACTUON

2017 ◽  
Vol 61 (1) ◽  
pp. 72
Author(s):  
Konstantin G. Gorbovskiy ◽  
Alena S. Ryzhova ◽  
Andrey M. Norov ◽  
Denis A. Pagaleshkin ◽  
Valentina N. Kalinina ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Thermal Decomposition ◽  
Phosphoric Acid ◽  
Ammonium Nitrate ◽  
Confined Space ◽  
Decomposition Products ◽  
X Ray ◽  
Thermal Decomposition Products ◽  
Nitrogen Phosphorus ◽  
Thermal Stability Of

Complex mineral ammonium nitrate-based fertilizers are complex multicomponent salt systems possessing low thermal stability and prone to self-sustaining decomposition. This leads to the need to increase the requirements for fire and explosion safety in their manufacture, storage and transportation, caused by the fact that ammonium nitrate is a solid oxidant able to support a combustion, and its heating in confined space can lead to detonation. Components that make up such fertilizers can both reduce (phosphates and ammonium sulfate) and accelerate (chlorine compounds) decomposition of ammonium nitrate. Thus, the thermal stability of fertilizers based on ammonium nitrate largely depends on the ratio of the components that make up its composition or formed as a result of the chemical reaction. The simplest way to reduce the content of ammonium nitrate and increase the thermal stability of fertilizer without changing the content of essential nutrients is to increase the degree of phosphoric acid ammoniation. In this paper, the phase composition change of grade 22:11:11 nitrogen-phosphorus-potassium fertilizer obtained with different ammoniation degree in the process of thermal decomposition was studied by X-ray phase analysis. To obtain this fertilizer, wet-process phosphoric acid obtained sulfuric acid attack of the Khibin apatite concentrate by a hemihydrate method is used. It is shown that an increase in the ammoniation degree has a significant effect on the exothermic decomposition of ammonium nitrate and the amount of material that is released into the gas phase. The phases formed at each stage of the decomposition are determined.Forcitation:Gorbovskiy K.G., Ryzhova A.S., Norov A.M., Pagaleshkin D.A., Kalinina V.N., Mikhaylichenko A.I. Study of thermal decomposition products of nitrogen-phosphorus-potassium fertilizers based on ammonium nitrate by X-ray diffractuon. Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol. 2018. V. 61. N 1. P. 72-77

A synergic approach of X-ray powder diffraction and Raman spectroscopy for crystal structure determination of 2,3-thienoimide capped oligothiophenes

2018 ◽  
Vol 20 (5) ◽  
pp. 3630-3636 ◽  
Author(s):  
C. Cappuccino ◽  
P. P. Mazzeo ◽  
T. Salzillo ◽  
E. Venuti ◽  
A. Giunchi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Powder Diffraction ◽  
Structure Determination ◽  
Molecular Conformation ◽  
Rapid Identification ◽  
Crystal Structure Determination ◽  
X Ray

This work presents a Raman based approach for the rapid identification of the molecular conformation in a series of new 2,3-thienoimide capped quaterthiophenes.

High‐Resolution X‐Ray Powder Diffraction Structure Determination of C60F48

2006 ◽  
Vol 14 (2-3) ◽  
pp. 279-285 ◽  
Author(s):  
R. J. Papoular ◽  
H. Allouchi ◽  
A. V. Dzyabchenko ◽  
V. A. Davydov ◽  
A. V. Rakhmanina ◽  
...  
Keyword(s):  
High Resolution ◽  
Powder Diffraction ◽  
Structure Determination ◽  
X Ray ◽  
Diffraction Structure
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