Isocubanite
Isocubanite is a sulfide mineral with the chemical formula copper iron trisulfide (CuFe2S3). It belongs to the cubic crystal system and is classified under the Strunz system as 2.CB.55b. This mineral is typically metallic in luster and exhibits a dark gray to black color. It has a hardness of approximately 3.5 to 4 on the Mohs scale and a relatively high density. Isocubanite is part of the sulfide mineral group and is closely related to other copper-iron sulfides. It is known for its distinct cubic crystal habit and is primarily of interest in mineralogical studies.
Composition
- FeIron41.1%
- SSulfur35.4%
- CuCopper23.4%
Overview
Isocubanite is a sulfide mineral with the chemical formula copper iron trisulfide (CuFe2S3). It belongs to the cubic crystal system and is classified under the Strunz system as 2.CB.55b. This mineral is typically metallic in luster and exhibits a dark gray to black color. It has a hardness of approximately 3.5 to 4 on the Mohs scale and a relatively high density. Isocubanite is part of the sulfide mineral group and is closely related to other copper-iron sulfides. It is known for its distinct cubic crystal habit and is primarily of interest in mineralogical studies.
Etymology
Isocubanite is named after the mineral cubanite, with the prefix 'iso-' indicating a similar or related composition or structure.
How to recognize it
Isocubanite can be identified by its metallic luster, dark gray to black color, and cubic crystal habit. It has a hardness of 3.5 to 4 on the Mohs scale and a relatively high density. A streak test typically yields a dark gray to black streak. It may be confused with other sulfide minerals such as cubanite or pyrite due to similar appearance, but its cubic form and chemical composition help distinguish it.
Trivia
Isocubanite is notable for its cubic crystal structure, which is relatively rare among sulfide minerals. It is chemically related to cubanite but differs in its stoichiometry and crystal system. Additionally, its name highlights its relationship to a well-known mineral, making it a point of interest in mineralogical classification.