Дипольное упорядочение и ионная проводимость в NASICON-подобных структурах типа Na-=SUB=-3-=/SUB=-Cr-=SUB=-2-=/SUB=-(PO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=- | Zendy

A. S. Nogai | Zendy; С.Ю. Стефанович | Zendy; А. А. Буш | Zendy; Д.Е. Ускенбаев | Zendy; А.А. Ногай | Zendy

Open Access

Дипольное упорядочение и ионная проводимость в NASICON-подобных структурах типа Na-=SUB=-3-=/SUB=-Cr-=SUB=-2-=/SUB=-(PO-=SUB=-4-=/SUB=-)-=SUB=-3-=/SUB=-

Author(s) -

A. S. Nogai,

С.Ю. Стефанович,

А. А. Буш,

Д.Е. Ускенбаев,

А.А. Ногай

Publication year - 2017

Publication title -

физика твердого тела

Language(s) - English

Resource type - Journals

eISSN - 1726-7498

pISSN - 0367-3294

DOI - 10.21883/ftt.2018.01.45284.014

Subject(s) - ionic conductivity , crystal structure , dipole , conductivity , ionic bonding , materials science , crystallography , fast ion conductor , polarization (electrochemistry) , relaxation (psychology) , crystal (programming language) , chemistry , condensed matter physics , ion , physics , social psychology , psychology , organic chemistry , electrode , computer science , programming language , electrolyte

The aspects of structure, dipole ordering, and ionic conductivity of the Na_3Cr_2(PO_4)_3 crystal with the four polymorphic phases (α, α', β, and γ) have been investigated. The features of the α-Na_3Cr_2(PO_4)_3 crystal structure and its dipole ordering and relaxation polarization in the low-temperature α and α' phases have been refined. The occurrence of Na_3Cr_2(PO_4)_3 dipole ordering in the α and α' phases and high ionic conductivity in the β and γ phases is attributed to the structural changes in the rhombohedral [ Me _2(PO_4)_3]^–3_3∞ crystal frame upon phase transformations α → α', α' → β, and β → γ. A model for explaining the dipole ordering and ionic conductivity phenomena in Na_3Cr_2(PO_4)_3 is proposed.

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