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. 2003 Mar 26;100(8):4405–4408. doi: 10.1073/pnas.252782399

Figure 4.

Figure 4

Pressure–composition phase diagram of magnesiowüstite. Open symbols, +, and × represent magnesiowüstite in the B1 structure; solid symbols and ticks indicate the phase-transition pressure from B1 to rhombohedral structure. The dashed curve represents a simple polynomial fit to all of the phase-transition pressures observed in magnesiowüstites. Two shock-wave studies on MgO and (Mg0.6,Fe0.4)O are under high P–T conditions (3, 14), and other studies are under high pressure and 300 K. ■, Shu et al. (5); solid ticks, Shu et al.**; ▴, Mao et al. (27); ♦, Richet et al. (25); ● and □, this study; +, Richet et al. (25); ⋄, Vissiliou and Ahrens (14); ×, Fei et al. (26); ○, Duffy et al. (4); and ▵, Vissiliou and Ahrens (3).