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Webster 1913 Edition

Ullmannite

Ull′mann-ite

,

Noun.

[So named after

J. C.

Ullman

, a German chemist.]

(Min.)

A brittle mineral of a steel-gray color and metallic luster, containing antimony, arsenic, sulphur, and nickel.

Definition 2024

ullmannite

ullmannite

English

Noun

ullmannite ‎(plural ullmannites)

(mineralogy) A nickel antimony sulphide mineral.