Cancrinite thin section

  • Before-Cancrinite #1
    After-Cancrinite #1
    N //Cancrinite #1N +
  • Before-Cancrinite #2
    After-Cancrinite #2
    N //Cancrinite #2N +
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General

Formula: (Na,Ca,▯)8(Al6Si6)O24(CO3,SO4)2 · 2H2O

Crystal system: Hexagonal

Distinguishing features

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N // (PPL)

Color: colourless

Pleochrosim:

Relief: low

Cleavage:

N + (XPL)

Isotropy/Anisotropy: anisotropic

Interference color: I-II

Extinction angle: parallel / 0° / straight

Twins:

Uniaxial/biaxial: Uniaxial (-)

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