Figure 1
From: Infrared evidence of a Slater metal-insulator transition in NaOsO3

The near-normal incidence reflectance of NaOsO3 is reported at selected temperatures from 5 K to 450 K on a linear scale in the 0–1000 cm−1 frequency range.
In the inset data are shown in the insulating (5 K) and in the metallic (450 K) states on a log scale in the whole frequency range. The MIT temperature is 410 K.