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Zircon

Nepheline syenite
Alnö, Sweden
Source: Thin section collection Steinmann-Institut, Universität Bonn
Photos: MMR
Comments and references:
  
  PPL

Variable crystal orientations (A)
Section ∥ c, c orthogonal to pol plane (B)
Section ∥ c, c in diagonal position (B)
Basal section (orthogonal to c) (B)
 
 
  +Pol

Variable crystal orientations (A)
Section ∥ c, c orthogonal to pol plane (ext position) (B)
Section ∥ c, c in diagonal position (max Δn ) (B)
Section ∥ c, c in diagonal position, +1λ (B)
Basal section (orthogonal to c, isotropic section) (B)
 

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Width of view   Pol orientation
 
 1 mm
   
 W-E
     

Zircon
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