Gurmeet Singh posted an Question
February 12, 2021 • 23:07 pm 30 points
  • IIT JAM
  • Geology (GG)

Which of the following indicatrix can be obtained if 2v 180° ? uniaxial positive uniaxial negative biaxial positive biaxial rnegative

Which of the following indicatrix can be obtained if 2V 180° ? Uniaxial positive Uniaxial negative Biaxial positive Biaxial rnegative

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    Sajan sarthak best-answer

    Uniaxial negative as 2v is either 0 or 180 in uniaxial mineral.

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    how negative postive decided?

  • comment-profile-img>
    Asif ali

    I think logic behind 2V 180° is to having only one optic axis which is only possible in Uniaxial minerals. Let's 2Va+2Vb = 180° ===> if one 2Va =0 then only one remaining 2Vb = 180° indicating that we have only one optic axis.

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