Определение bornite в Английский Язык Английский Язык словарь
A reddish mineral that tarnishes on exposure to air; it is a mixed sulfide of iron and copper with the chemical formula Cu5FeS and is an important ore of copper
Common copper-ore mineral, copper and iron sulfide (Cu5FeS4). Typical occurrences are found in Mount Lyell, Tasmania; Chile; Peru; and Butte, Mont. Bornite may form isometric crystals but occurs most commonly as irregular masses. Under appropriate geologic conditions, it alters to chalcocite and other copper minerals
a mineral consisting of sulfides of copper and iron that is found in copper deposits
A reddish mineral that tarnishes on exposure to air; it is a mixed sulfide of iron and copper and is an important ore of copper
A valuable ore of copper, containing copper, iron, and sulphur; also called purple copper ore (or erubescite), in allusion to the colors shown upon the slightly tarnished surface