What Is the Chemical Formula of Bornite?

In summary, the chemical formula of bornite can vary, with possible compositions ranging from Cu5FeS4 to Cu9S5. Exsolution of other minerals, such as chalcopyrite, digenite, and chalcocite, is also common in bornite.
  • #1
gracy
2,486
83
What's the chemical formula of bornite?According to wikipedia
http://en.wikipedia.org/wiki/Bornite
it is Cu5FeS4.According to http://www.spiritofisis.org/knowledge/crystal_files/bornite.htm
it is Cu2FeS4 and as per my textbook it is Cu3FeS2.Now,What's the actual chemical formula of bornite?I am really confused.
 
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  • #2
gracy said:
According to wikipedia

Never hurts to read the entire article:

"Substantial variation in the relative amounts of copper and iron is possible and solid solution extends towards chalcopyrite (CuFeS2) and digenite (Cu9S5). Exsolution of blebs and lamellae of chalcopyrite, digenite, and chalcocite is common."
 
  • #3
Borek said:
Never hurts to read the entire article:
Yes.You are right.Thanks for your answer @ Borek
 

Related to What Is the Chemical Formula of Bornite?

1. What is the chemical formula of bornite?

The chemical formula of bornite is Cu5FeS4, meaning it contains 5 copper atoms, 1 iron atom, and 4 sulfur atoms.

2. How is the chemical formula of bornite determined?

The chemical formula of bornite is determined through chemical analysis and observation of its composition. This involves breaking down the mineral and identifying the elements present, as well as their ratios.

3. What is the significance of the chemical formula of bornite?

The chemical formula of bornite is significant because it represents the exact composition of the mineral. It also helps to classify it into a specific mineral group and determine its properties.

4. Can the chemical formula of bornite vary?

Yes, the chemical formula of bornite can vary slightly, depending on impurities and substitutions in its structure. However, the general formula remains the same.

5. How is the chemical formula of bornite used in mineral identification?

The chemical formula of bornite is used in mineral identification by comparing it to known mineral formulas and conducting tests to confirm its composition. It is also used to distinguish bornite from other minerals with similar physical properties.

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