Extended Data Fig. 1: Physical properties of Na3CrF6 and other host matrixes.
From: High-brightness transition metal-sensitized lanthanide near-infrared luminescent nanoparticles
a-c, The XRD patterns of Na3CrF6:Er (a), α-NaErF4 (b) and β-NaErF4 (c), respectively. d-i, k-space (d, e, and f) and R-space (g, h, and i) EXAFS fitting results of Na3CrF6:Er, α-NaErF4 and β-NaErF4, respectively. j-l, Raman spectrum of Na3CrF6 (j), α-NaYF4 (k) and β-NaYF4 (l). m, The DFT calculation of Na or Cr in Cr2Na6F6 replaced by Er.
