Figure 3: The effective control of thermal expansion of ScF3-based compounds. | Nature Communications

Figure 3: The effective control of thermal expansion of ScF3-based compounds.

From: Tunable thermal expansion in framework materials through redox intercalation

Figure 3

(a) Temperature evolution of relative change in the lattice constant for the PTE LSFF-1 (Li0.06(Sc0.9Fe0.1)F3 after annealing 425 K), near ZTE LSFF-2 (Li0.04(Sc0.94Fe0.06)F3 after annealing 475 K), moderate NTE LSFF-3 (Li0.02(Sc0.97Fe0.03)F3 after annealing 525 K), moderate NTE (Sc0.9Fe0.1)F3 and strong NTE ScF3. Errors are smaller than the size of data symbols. (b) The stoichiometry of Li and Fe in the main ReO3-type phase, Lix(Sc1-yFey)F3, for the Li0.06(Sc0.9Fe0.1)F3 sample as function of temperature. The stoichiometric values of Li and Fe were estimated according to the content of all phases by means of full-profile Rietveld refinements of neutron powder diffraction (LSFF-1: Li0.06(Sc0.9Fe0.1)F3, LSFF-2: Li0.04(Sc0.94Fe0.06)F3, LSFF-3: Li0.02(Sc0.97Fe0.03)F3, and LSFF-4: ScF3).

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