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From rotation and oscillation photographs with Mo Kα, rhombic sulphur is found to have the following cell and space group; a = 10.48A, b = 12.92A, c = 24.55A, Z = 128, space group Vh24(Fddd). The structure contains S8 molecules which are symmetrical puckered rings with S–S distance 2.12A and bond angle α = 105°. The atomic coordinates are determined by comparison of calculated amplitudes with visual intensity estimates from oscillation photographs. The relation of rhombic sulphur to the high temperature forms is discussed briefly.
Warren et al. (Tue,) studied this question.
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