The metastable phase diagram for white phosphorus. The white allotrope stability field consists of the phase, solid diamonds at ambient pressure by Simon et al. Ref. 7 and Okudera et al. Ref. 9; the-phase boundary, open hexagons by Bridgman Ref. 4 using the originally reported pressure values; the-phase boundary at ambient temperature, dashed vertical line at 0.87 GPa see inset, this work; the solid alpha-liquid transition line, crosses by Bridgman Ref. 4; the-bP transitions, open circles by Patz Ref. 26, open downward triangles to amorphous black phosphorus a-bP 70 min conversion time and solid upward triangles to a-bP 10 min conversion time by Jacobs Ref. 27, black stars to a-bP and bP orthorhombic phases by Bridgman Ref. 4,-bP orthorhombic, open white star this work; the white-bP orthorhombic dashed transition line is drawn only as a suggestion; the bP orthorhombic-bP rhombohedral transition line, solid circles by Shirotani et al. Ref. 28; and the bP rhombohedral-bP simple cubic transition line by Kikegawa Ref. 20.

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... Our cubic white phosphorus and orthorhombic, rhombohedra and simple cu- bic black phosphorus volume data were used to determine ambient pressure volumes and bulk moduli. As might be ex- pected the ambient pressure volumes were found to decrease and the bulk moduli were found to increase with increasing pressure of formation for each phase Fig. 7. ...