Fig. 4: Structural evolution in the GPM Form II-Form IV solid-solid phase transition.
From: Phase-selective synthesis and polymorphic transformation of crystalline red phosphorus
a Electronic energy distribution diagram of different elemental RP calculated theoretically, with β-white phosphorus (WP) as the energy reference. The structural order degree of the three aRP phases (1, 2, and 3) increases sequentially42. b, c The curve of relative content of Form IV (Form II-Form IV transition) and Form V (Form IV-Form V transition) as a function of conversion time, respectively. Note: See Supplementary Information for details on the calculation of relative contents. d Crystal structure of Form II, with the horizontal direction representing the \(w\)-axis (\(w=2a+b\)). e Calculated electronic energy distribution diagrams of Form II subunits, Form IV, and the intermediates in the Form II-Form IV transition. f The Raman spectrum variation with the position of the scanning point obtained by line scanning along the one-dimensional rod growth direction and g the corresponding Raman contour plot. The orange dashed line indicates the boundary between Form II and Form IV. h Schematic diagram of the transformation of Form II-Form IV. Note: Data used in (a, e) are summarized in Supplementary Table 2 and Table 3, respectively.
