title: Deformation Behavior across the Zircon-Scheelite Phase Transition.
abstract: The pressure effects on plastic deformation and phase transformation mechanisms of materials are of great importance to both Earth science and technological applications. Zircon-type materials are abundant in both nature and the industrial field; however, there is still no in situ study of their deformation behavior. Here, by employing radial x-ray diffraction in a diamond anvil cell, we investigate the dislocation-induced texture evolution of zircon-type gadolinium vanadate (GdVO_{4}) in situ under pressure and across its phase transitions to its high-pressure polymorphs. Zircon-type GdVO_{4} develops a (001) compression texture associated with dominant slip along ⟨100⟩{001} starting from 5 GPa. This (001) texture transforms into a (110) texture during the zircon-scheelite phase transition. Our observation demonstrates a martensitic mechanism for the zircon-scheelite transformation. This work will help us understand the local deformation history in the upper mantle and transition zone and provides fundamental guidance on material design and processing for zircon-type materials.
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Road, Pudong, Shanghai 201203, People's Republic of China.|Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Binbin
authors.initials: B
authors.lastname: Yue
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Road, Pudong, Shanghai 201203, People's Republic of China.|Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Fang
authors.initials: F
authors.lastname: Hong
authors.affiliation: Unité Matériauxet Transformations, ENSCL, CNRS, Université de Lille, 59000 Lille, France.|Institut Universitaire de France, 75005 Paris, France.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Merkel
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Road, Pudong, Shanghai 201203, People's Republic of China.|Key Laboratory of Mineralogy and Metallogeny, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, People's Republic of China.
authors.forename: Dayong
authors.initials: D
authors.lastname: Tan
authors.affiliation: Advanced Light Source, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
authors.forename: Jinyuan
authors.initials: J
authors.lastname: Yan
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Road, Pudong, Shanghai 201203, People's Republic of China.
authors.forename: Bin
authors.initials: B
authors.lastname: Chen
authors.affiliation: Center for High Pressure Science and Technology Advanced Research, 1690 Cailun Road, Pudong, Shanghai 201203, People's Republic of China.
authors.forename: Ho-Kwang
authors.initials: HK
authors.lastname: Mao