[(NCZF)_1−x(Na(ac.ac))_x]

t (nm) from XRD

t (nm) from TEM

[100% (NCZF), 0% (Na(ac.ac))]

26.869

26.112

[80% (NCZF), 20% (Na(ac.ac))]

28.044

28.775

[60% (NCZF), 40% (Na(ac.ac))]

31.623

30.983

[40% (NCZF), 60% (Na(ac.ac))]

35.593

33.043

[20% (NCZF), 80% (Na(ac.ac))]

36.864

36.984

[0% (NCZF), 100% (Na(ac.ac))]

37.342

37.421