Which element does not occur as distinct allotropes at temperatures between 0° C and 150° C?

Silicon element does not occur as distinct allotropes at temperatures between 0° C and 150° C.

At room temperature, silicon (Si) may be found in two different allotropic states, known as the crystalline allotrope and the amorphous allotrope. The crystalline allotrope has a metallic aspect and is gray, whereas the amorphous allotrope is a brown powder.