Anukruti posted an MCQ
September 30, 2020 • 04:48 am 30 points
  • IIT JAM
  • Geology (GG)

The 010 section of monoclinic mineral necessarily shows

Choose Your Answer:
2 Attempts Submit Now
  • 0 Likes
  • 3 Comments
  • 0 Shares
  • comment-profile-img>
    Rahul kumar

    (001) face will also show inclined extinction in monoclinic. Only (100) face will show parallel extinction in monoclinic minerals.

    eduncle-logo-app

    basal section 001 and ortho section will show straight extinction

    eduncle-logo-app

    Dear Anukruti, kindly have a look at the attached figure. Preferred direction (cleavage) on face (001) is not parallel to principal vibration direction and hence will not show straight extinction.

    eduncle-logo-app

    In monoclinic, only faces parallel to (100) shows parallel extinction.

    eduncle-logo-app

    Kindly ask if you have any further queries.

  • comment-profile-img>
    Rahul kumar best-answer

    (010) face of monoclinic crystal shows inclined extinction. Only if the (100) face is parallel to the stage will parallel extinction be observed.

    eduncle-logo-app

    wat about 001 face?wat extinction will it show

  • comment-profile-img>
    Sajan sarthak Best Answer

    This is a section Cut the b axis so the vibration direction is not parallel to the axis . So inclined Extinction. Basal section (001) and Ortho section (Cut the a axis and parallel to b will ) show straight Extinction

    cropped7813327646035105625.jpg
whatsapp-btn

Do You Want Better RANK in Your Exam?

Start Your Preparations with Eduncle’s FREE Study Material

  • Updated Syllabus, Paper Pattern & Full Exam Details
  • Sample Theory of Most Important Topic
  • Model Test Paper with Detailed Solutions
  • Last 5 Years Question Papers & Answers