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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ståhl, Kenny
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (33/33 displayed)
- 2017The ternary Fe-C-N system: Homogeneous distributions of nitrogen and carboncitations
- 2017The ternary Fe-C-N system: Homogeneous distributions of nitrogen and carboncitations
- 2017On the elusive crystal structure of expanded austenitecitations
- 2017Effect of carbon on interstitial ordering and magnetic properties of ε-Fe2(N,C)1-zcitations
- 2017Effect of carbon on interstitial ordering and magnetic properties of ε-Fe2(N,C) 1-zcitations
- 2016Composition-dependent variation of magnetic properties and interstitial ordering in homogeneous expanded austenitecitations
- 2016Composition-dependent variation of magnetic properties and interstitial ordering in homogeneous expanded austenitecitations
- 2016On the Carbon Solubility in Expanded Austenite and Formation of Hägg Carbide in AISI 316 Stainless Steelcitations
- 2016On the Carbon Solubility in Expanded Austenite and Formation of Hägg Carbide in AISI 316 Stainless Steelcitations
- 2014Thermal expansion and phase transformations of nitrogen-expanded austenite studied with in situ synchrotron X-ray diffractioncitations
- 2014Thermal expansion and phase transformations of nitrogen-expanded austenite studied with in situ synchrotron X-ray diffractioncitations
- 2012Extended x-ray absorption fine structure investigation of annealed carbon expanded austenitecitations
- 2012Extended x-ray absorption fine structure investigation of annealed carbon expanded austenitecitations
- 2011Extended X-Ray Absorption Fine Structure Investigation of Carbon Stabilized Expanded Austenite and Carbides in Stainless Steel AISI 316citations
- 2011Extended X-Ray Absorption Fine Structure Investigation of Carbon Stabilized Expanded Austenite and Carbides in Stainless Steel AISI 316citations
- 2010Extended X-ray absorption fine structure investigation of nitrogen stabilized expanded austenitecitations
- 2010Extended X-ray absorption fine structure investigation of nitrogen stabilized expanded austenitecitations
- 2008Modelling the X-ray powder diffraction of nitrogen-expanded austenite using the Debye formulacitations
- 2008Modelling the X-ray powder diffraction of nitrogen-expanded austenite using the Debye formulacitations
- 2008EXAFS investigation of low temperature nitrided stainless steelcitations
- 2008EXAFS investigation of low temperature nitrided stainless steelcitations
- 2007Nanoscale structural characterization of Mg(NH 3 ) 6 Cl 2 during NH 3 desorption:An in situ small angle X-ray scattering studycitations
- 2007Crystal structure and phase transitions in perovskite-like C(NH<inf>2</inf>)<inf>3</inf>SnCl<inf>3</inf>citations
- 2007Devitrification and high temperature properties of mineral woolcitations
- 2007Nanoscale structural characterization of Mg(NH3)6Cl2 during NH3 desorptioncitations
- 2006Activation of a Cu/ZnO catalyst for methanol synthesiscitations
- 2006Synthesis and characterization of strontium carboxylates at room temperature and at high temperature in autoclave vesselscitations
- 2005On the determination of crystallinity and cellulose content in plant fibrescitations
- 2003Re4As6S3, a thio-spinel-related cluster system
- 2003Origin of nondetectable x-ray diffraction peaks in nanocomposite CuTiZr alloyscitations
- 2001Hardness and thermal stability of cubic silicon nitride
- 2000Pressure-induced decoupling of the order-disorder and displacive contributions to the phase transition in diguanidinium tetrachlorostannatecitations
- 2000Formation of quasicrystals in Zr46.8Ti8.2Cu7.5Ni10Be27.5 bulk glasscitations
Places of action
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article
Pressure-induced decoupling of the order-disorder and displacive contributions to the phase transition in diguanidinium tetrachlorostannate
Abstract
The crystals of diguanidinium tetrachlorostannate [C(NH2)(3)](2)(+).SnCl4-2, were studied by single-crystal x-ray diffraction at various temperatures and by calorimetric and dielectric measurements at ambient and high hydrostatic pressures. At room temperature the crystal structure is orthorhombic, space group Pbca, and consists of infinite staggered (SnCl4-2), chains built of square pyramids sharing corners and of two crystallographically different guanidinium cations G(1) and G(2), located in two kinds of voids between the chains. The polyanionic chains are tied into double sheets by the G(1) cations. At ambient pressure the crystals undergo two first-order phase transitions at 354.8 and 395.4 K. The former, between two orthorhombic phases (Pbca --> Cmca), is characterized by antiphase displacement of the double sheets along the b direction of the low-temperature unit cell which is coupled to dynamical disordering of G(2) and transformation of its hydrogen bonding scheme. At elevated pressures the coupling between the displacive and order-disorder contributions is modified and its breaking near a triple point at 180 MPa and 270 K results in a pressure-induced phase observed between Pbca and Cmca phases.