Mineral Information and Data:

Chalcophanite
ZnMn4+3O7 • 3H2O [CNMNC approved formula]

Named From the Greek for "copper" and "to appear," for the mineral's change in color on ignition.

IMA status : Valid species (Pre-IMA 1875) Grandfathered
CLASSIFICATION 
Dana
(8th edition) :
07.08.02.01  
  (07) Multiple Oxides
  (07.08) where A B (O)2 · x(H2O)
  (07.08.02) Chalcophanite Group
  
Nickel-Strunz
(10th edition) :
04.FL.20
  (04) Oxides and Hydroxides
  (04.F) Hydroxides (without V or U)
  (04.FL) Hydroxides with H2O +- (OH); sheets of edge-sharing octahedra
  
Crystal system: Trigonal System
Point group (H-M): 3 — rhombohedral
  
  
  

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