Details

Autor(en) / Beteiligte

• Pet’kov, V. I.
• Sukhanov, M. V.
• Shipilov, A. S.
• Kurazhkovskaya, V. S.
• Borovikova, E. Yu
• Pinus, I. Yu
• Yaroslavtsev, A. B.

Titel

Synthesis and properties of LiZr2(AsO4)3 and LiZr2(AsO4)x(PO4)3 − x

Ist Teil von

• Inorganic materials, 2014-03, Vol.50 (3), p.263-272

Ort / Verlag

Boston: Springer US

Erscheinungsjahr

2014

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The LiZr 2 (AsO 4 ) 3 arsenate and LiZr 2 (AsO 4 ) x (PO 4 ) 3 − x solid solutions have been prepared through precipitation followed by heat treatment, and characterized by X-ray diffraction, X-ray structure analysis, IR spectroscopy, and impedance spectroscopy. We have established conditions for the crystallization of the arsenate and a continuous series of arsenate phosphate solid solutions (0 ≤ x ≤ 3), which have been obtained as two polymorphs: monoclinic and hexagonal. Using the Rietveld method, we have refined the crystal structures of the polymorphs of LiZr 2 (AsO 4 ) 3 (sp. gr. P 2 1 / n , a = 9.1064(2), b = 9.1906(2), c = 12.7269(3) Å, β = 90.844(2)°, V =1065.03(5) Å 3 , Z = 4; sp. gr. R c , a = 9.1600(4), c = 22.9059(13) Å, V = 1664.44(14) Å, Z = 6) and LiZr 2 (AsO 4 ) 1.5 (PO 4 ) 1.5 . Their structural frameworks are built up of AsO 4 tetrahedra—or (As,P)O 4 tetrahedra occupied by arsenic and phosphorus atoms at random—and ZrO 6 octahedra, with the lithium atoms in between. The ionic conductivity of the materials has been measured. The cation conductivity of monoclinic LiZr 2 (AsO 4 ) x (PO 4 ) 3 − x with 0 ≤ x ≤ 1 has been shown to exceed the conductivity of lithium zirconium phosphate.