Sökning: onr:"swepub:oai:DiVA.org:liu-174465" >
Polymorphs of the G...
Polymorphs of the Gadolinite-Type Borates ZrB2O5 and HfB2O5 Under Extreme Pressure
-
- Pakhomova, Anna (författare)
- Deutsch Elektronen Synchrotron DESY, Germany
-
- Fuchs, Birgit (författare)
- Univ Innsbruck, Austria
-
- Dubrovinsky, Leonid S. (författare)
- Univ Bayreuth, Germany
-
visa fler...
-
- Doubrovinckaia, Natalia (författare)
- Linköpings universitet,Teoretisk Fysik,Tekniska fakulteten,Univ Bayreuth, Germany
-
- Huppertz, Hubert (författare)
- Univ Innsbruck, Austria
-
visa färre...
-
(creator_code:org_t)
- 2021-03-03
- 2021
- Engelska.
-
Ingår i: Chemistry - A European Journal. - : WILEY-V C H VERLAG GMBH. - 0947-6539 .- 1521-3765. ; 27:19, s. 6007-6014
- Relaterad länk:
-
https://liu.diva-por... (primary) (Raw object)
-
visa fler...
-
https://onlinelibrar...
-
https://urn.kb.se/re...
-
https://doi.org/10.1...
-
visa färre...
Abstract
Ämnesord
Stäng
- Based on the results from previous high-pressure experiments on the gadolinite-type mineral datolite, CaBSiO4(OH), the behavior of the isostructural borates beta-HfB2O5 and beta-ZrB2O5 have been studied by synchrotron-based in situ high-pressure single-crystal X-ray diffraction experiments. On compression to 120 GPa, both borate layer-structures are preserved. Additionally, at approximate to 114 GPa, the formation of a second phase can be observed in both compounds. The new high-pressure modification gamma-ZrB2O5 features a rearrangement of the corner-sharing BO4 tetrahedra, while still maintaining the four- and eight-membered rings. The new phase gamma-HfB2O5 contains ten-membered rings including the rare structural motif of edge-sharing BO4 tetrahedra with exceptionally short B-O and B...B distances. For both structures, unusually high coordination numbers are found for the transition metal cations, with ninefold coordinated Hf4+, and tenfold coordinated Zr4+, respectively. These findings remarkably show the potential of cold compression as a low-energy pathway to discover metastable structures that exhibit new coordinations and structural motifs.
Ämnesord
- NATURVETENSKAP -- Kemi -- Oorganisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Inorganic Chemistry (hsv//eng)
Nyckelord
- borates; diamond anvil cell; gadolinite structure; high-pressure chemistry; synchrotron radiation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
Till lärosätets databas