Otavite grains are very tiny in size, being commonly only several microns, and the large ones are several tens of microns.

• 菱镉矿的晶粒微小,一般只有几个微米,大者几十微米,常与菱锌矿、硫镉矿共生或伴生在一起,呈疏松集合体、皮壳或薄膜状产出。