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Andalusite

Contact-metamorphic slate (andalusite, quartz, muscovite, magnetite, secondary mica)
Andlau, Vosges, France
Source: Thin section collection Steinmann-Institut, Universität Bonn
Photos: MMR
Comments and references:
 
  PPL

Non-specific crystal orientation (A)
Non-specific crystal orientation (B)
Section orthogonal to c (B)
 
 
  +Pol

Non-specific crystal orientation (A)
Non-specific crystal orientation, +1λ (A)
Non-specific crystal orientation (B)
Non-specific crystal orientation, +1λ (B)
Section orthogonal to c, ext position (B)
 

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Width of view   Pol orientation
 
 1 mm
   
 W-E
     

Andalusite
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