000878372 001__ 878372 000878372 005__ 20240712113151.0 000878372 0247_ $$2doi$$a10.1016/j.scriptamat.2020.07.048 000878372 0247_ $$2ISSN$$a1359-6462 000878372 0247_ $$2ISSN$$a1872-8456 000878372 0247_ $$2Handle$$a2128/26232 000878372 0247_ $$2altmetric$$aaltmetric:87903831 000878372 0247_ $$2WOS$$aWOS:000573816100002 000878372 037__ $$aFZJ-2020-02812 000878372 082__ $$a670 000878372 1001_ $$0P:(DE-Juel1)137024$$aKowalski, Piotr$$b0$$eCorresponding author 000878372 245__ $$aFormation enthalpy of Ln2B2O7-type (B=Ti,Sn,Hf,Zr) compounds 000878372 260__ $$aAmsterdam [u.a.]$$bElsevier Science$$c2020 000878372 3367_ $$2DRIVER$$aarticle 000878372 3367_ $$2DataCite$$aOutput Types/Journal article 000878372 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1648452131_2000 000878372 3367_ $$2BibTeX$$aARTICLE 000878372 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000878372 3367_ $$00$$2EndNote$$aJournal Article 000878372 500__ $$aArbeit entstand am IEK-6 000878372 520__ $$aWe performed systematic ab initio calculations of the formation enthalpies of Ln2B2O7-type (B=Ti,Sn,Hf,Zr) compounds in pyrochlore, weberite and defect fluorite structure. The comparison with the experimental data shows that except the case, the defect fluorite phase is unstable in the entire range of considered compositions and weberite structure fits much better the measured thermochemistry data. We found that for the Ln2Hf2O7 and Ln2Zr2O7 compositions weberite is more stable than pyrochlore for lanthanides after Dy and Gd, respectively. This clearly indicates the importance of the short-range ordering for determination of stability field of pyrochlore-type compounds. 000878372 536__ $$0G:(DE-HGF)POF3-113$$a113 - Methods and Concepts for Material Development (POF3-113)$$cPOF3-113$$fPOF III$$x0 000878372 536__ $$0G:(DE-HGF)POF3-161$$a161 - Nuclear Waste Management (POF3-161)$$cPOF3-161$$fPOF III$$x1 000878372 536__ $$0G:(DE-Juel1)jiek61_20181101$$aAtomistic modeling of radionuclide-bearing materials for safe management of high level nuclear waste. 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