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Kyanite

Garnet-staurolite-kyanite schist
Alpe Frodalera, Ticino, Switzerland
Source: Thin section collection Steinmann-Institut, Universität Bonn
Photos: MMR
Comments and references:
 
  PPL

Section sub-∥ c, diagonal position (A)
Section sub-∥ c, close to (100) (B)
 
 
  +Pol

Section sub-∥ c, diagonal position (A)
Section sub-∥ c, diagonal position, +1λ (Z′ ∥ Zcomp) (A)
Section sub-∥ c, close to (100) (B)
Section sub-∥ c, close to (100), +1λ (Y′ ∥ Zcomp) (B)
 

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Width of view   Pol orientation
 
 2 mm
   
 W-E
     

Kyanite
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