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Andalusite

Contact-metamorphic slate (andalusite, biotite, secondary mica)
Kraslice, Erzgebirge Mountains, Czech Republic
Source: Thin section collection Steinmann-Institut, Universität Bonn
Photos: MMR
Comments and references:
 
  PPL

Elongate section ∥ c, diagonal position
 
 
  +Pol

Elongate section ∥ c, diagonal position
Elongate section ∥ c, diagonal position, +1λ (a = X ∥ Zcomp)
 

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Width of view   Pol orientation
 
 1 mm
   
 W-E
     

Andalusite
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