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Viridine

Low-grade Mn-Al-rich metasediment
Le Coreux, Vielsalm, Stavelot Massif, Belgium
Source: Thin section collection - Institut für Geologie, Mineralogie und Geophysik, Ruhr-Universität Bochum
Photos: MMR
Comments and references:
Literature: Kramm, U. (1979), Contributions to Mineralogy and Petrology 69, 387-395
Schreyer, W., Bernhardt, H.J., Fransolet, A.M., and Armbruster, T., 2004, Contributions to Mineralogy and Petrology 147, 276-287.
  
  PPL

Variable crystal orientations; b-c sections: crystal at lower centre (b = Y ∥ pol plane) and crystal on the right (c = Z ∥ pol plane) (A)
Variable crystal orientations; b-c sections: crystal at top left (c = Z ∥ pol plane) and crystal at bottom left (b = Y ∥ pol plane) (A)
Section ∥ b and c, b = Y ∥ pol plane (B)
Section ∥ b and c, c ∥ pol plane (B)
 
 
  +Pol

Variable crystal orientations; b-c sections: crystal at lower centre (b = Y ∥ pol plane) and crystal at centre right (c = Z ∥ pol plane) (A)
Section ∥ b and c, diagonal position (B)
 

  Additional images

  Image comments

   
Positions shows colours relating to Y (max absorption; crystal at lower centre) and Z (intermediate absorption; crystal on the right)
 

Width of view   Pol orientation
 
 1 mm
   
 W-E
     

Viridine
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