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The low-temperature form of white phosphorus (β-P, Ttrans= -76.4°C) is triclinic, P1. The asymmetric unit contains 3 independent tetrahedral P4 molecules. Intramolecular angles are 60 ± 0.5° and the P-P distances are d=220.9(5) pm. The structure of β-P is related to that of γ-Pu, the Pu atoms being substituted by P4.
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Simon et al. (1987) studied this question.
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