Fig. 1: X-ray diffraction (XRD) patterns collected at 38 and 117 GPa at different temperatures. | Communications Materials

Fig. 1: X-ray diffraction (XRD) patterns collected at 38 and 117 GPa at different temperatures.

From: Experimental and theoretical confirmation of an orthorhombic phase transition in niobium at high pressure and temperature

Fig. 1

Temperatures are indicated. Nb, NaCl, and MgO Bragg peaks are labeled. In order to highlight the detection of the recrystallization and melting phenomena at 38 GPa, we have excluded XRD patterns where the orthorhombic Pnma structure is detected to coexist with body-centered cubic bcc-Nb; examples of such bcc-Pnma coexistence are shown in Fig. 3.

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