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Text File  |  1992-09-02  |  253b  |  9 lines
  1. Sphalerite is the chief ore of zinc, composed 
  2. of zinc sulphide with a small proportion of 
  3. iron, formula (Zn,Fe)S. It is brown with a 
  4. nonmetallic lustre unless an appreciable 
  5. amount of iron is present (up to 26% by 
  6. weight). 
  7.  
  8. Subject by: Vince Pike
  9.