monoclinic sulfur

chemistry

Also known as: prismatic sulfur

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June 30, 2026

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Monoclinic sulfur, also known as beta-sulfur ((\beta)-sulfur), is one of the allotropic forms of the element sulfur. It is characterized by its crystalline structure, which belongs to the monoclinic system. This form is stable at temperatures between 96 °C (204.8 °F) and its melting point of 118.9 °C (246 °F).12

At temperatures below 96 °C, monoclinic sulfur transforms into rhombic sulfur, which is the more common yellow crystalline form of sulfur. Monoclinic sulfur has a density of 1.96 grams/cm³.31

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sulfur
Allotropy
…S₈ ring allotropes is the monoclinic or β-form, in which two of the axes of the crystal are perpendicular, but the third forms an oblique angle with the first two. There are still some uncertainties concerning its structure; this modification is stable from 96 °C to the melting point, 118.9…
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…S₈ ring allotropes is the monoclinic or β-form, in which two of the axes of the crystal are perpendicular, but the third forms an oblique angle with the first two. There are still some uncertainties concerning its structure; this modification is stable from 96 °C to the melting point, 118.9…
Read More