Ulmannite or Ullmannite: How To spell?
The word Ulmannite is misspelled against Ullmannite, a noun meaning "A brittle mineral of a steel-gray color and metallic luster, containing antimony, arsenic, sulphur, and nickel."
The word Ulmannite is misspelled against Ullmannite, a noun meaning "A brittle mineral of a steel-gray color and metallic luster, containing antimony, arsenic, sulphur, and nickel."