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Staurolite

Staurolite-mica schist
Sobotin, Moravia, Czech Republic
Source: Thin section collection Steinmann-Institut, Universität Bonn
Photos: MMR
Comments and references:
  
  PPL

Section ∥ a and c, c = Z ∥ pol plane [A}
Section ∥ a and c, a = Y ∥ pol plane [A]
Basal section (orthogonal to c), a = Y ∥ pol plane [B]
Section orthogonal to c, b = X ∥ pol plane [B]
Section ∥ b and c, c = Z ∥ pol plane [C]
Section ∥ b and c, b = X ∥ pol plane [C]
Section ∥ b (= X) and c (= Z), diagonal position [C]
Unspecified crystal orientation [D]
 
 
  +Pol

Section ∥ a (= Y) and c (= Z), diagonal position [A]
Section ∥ a (= Y) and c (= Z), diagonal position, +1λ [A]
Section orthogonal to c, diagonal position [B]
Section orthogonal to c, diagonal position, +1λ [B]
Section orthogonal to c, diagonal position, +1λ [B]
Section ∥ b (= X) and c (= Z), diagonal position (max Δn) [C]
Section ∥ b (= X) and c (= Z), diagonal position, +1λ [C]
Unspecified crystal orientation [D]
Unspecified crystal orientation, +1λ [D]
 

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Width of view   Pol orientation
 
 4 mm
   
 W-E
     

Staurolite
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