Fig. 5: Negative thermal expansion. | Light: Science & Applications

Fig. 5: Negative thermal expansion.

From: Thermally stable and highly efficient red-emitting Eu3+-doped Cs3GdGe3O9 phosphors for WLEDs: non-concentration quenching and negative thermal expansion

Fig. 5

a Enlarged XRD patterns (2θ = 25.5–27°) of CEGO at different temperatures (25–250 °C). b The variation in cell parameters (a–c) for CEGO from 25 to 250 °C. c The linear fitting of cell volumes over the temperature range from 25 to 250 °C. d The variation in the distortion of the EuO6 octahedron with increasing temperature from 25 to 250 °C

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