Polymorphism of anhydrous oxalic acid unravelled

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00542947" target="_blank" >RIV/68378271:_____/21:00542947 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22340/21:43922432

Výsledek na webu

<a href="https://doi.org/10.1016/j.jct.2021.106488" target="_blank" >https://doi.org/10.1016/j.jct.2021.106488</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jct.2021.106488" target="_blank" >10.1016/j.jct.2021.106488</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Polymorphism of anhydrous oxalic acid unravelled

Popis výsledku v původním jazyce

Despite being a very common compound in the industry as well as in the nature, the thermodynamic description of oxalic acid is far from being complete and reliable. The literature is contradictory considering both preparation of the two known polymorphs and the triple point temperature above which β-form should be more stable. The published vapour pressure data for α-phase show also a considerable disagreement. In this work, the polymorphs of anhydrous oxalic acid are subjected to a combined thermodynamic and X-ray diffraction study since a single technique cannot give an exhaustive answer on the phase behaviour of the compound. The simultaneous correlation procedure that combines vapour pressure data, calorimetric phase-transition properties, and heat capacities of the crystalline and ideal-gas phase is used to develop a consistent thermodynamic description. Finally, the triple point temperature and transition enthalpy are derived.

Název v anglickém jazyce

Polymorphism of anhydrous oxalic acid unravelled

Popis výsledku anglicky

Despite being a very common compound in the industry as well as in the nature, the thermodynamic description of oxalic acid is far from being complete and reliable. The literature is contradictory considering both preparation of the two known polymorphs and the triple point temperature above which β-form should be more stable. The published vapour pressure data for α-phase show also a considerable disagreement. In this work, the polymorphs of anhydrous oxalic acid are subjected to a combined thermodynamic and X-ray diffraction study since a single technique cannot give an exhaustive answer on the phase behaviour of the compound. The simultaneous correlation procedure that combines vapour pressure data, calorimetric phase-transition properties, and heat capacities of the crystalline and ideal-gas phase is used to develop a consistent thermodynamic description. Finally, the triple point temperature and transition enthalpy are derived.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2021

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Chemical Thermodynamics

ISSN

0021-9614

e-ISSN

1096-3626

Svazek periodika

160

Číslo periodika v rámci svazku

Sep

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

106488

Kód UT WoS článku

000659250500004

EID výsledku v databázi Scopus

2-s2.0-85105329857