Ishita Das posted an Question
December 11, 2020 • 05:15 am 30 points
  • IIT JAM
  • Geology (GG)

An eight-sided basal section of a mineral containing two sets of cleavages at an angle of 90° is a) hornblende (b) diopside (c) caleite (d) sanidine

An eight-sided basal section of a mineral containing two sets of cleavages at an angle of 90° is A) Hornblende (B) Diopside (C) Calcite (D) Sanidine

2 Answer(s) Answer Now
  • 1 Likes
  • 2 Comments
  • 0 Shares
  • comment-profile-img>
    Rahul kumar Best Answer

    Answer (b) Diopside Diopside is a type of Pyroxene. Pyroxene minerals have two sets of cleavage at 90° and eight sided basal section. Hornblende minerals have two sets of cleavage at 120°. Sanidine is a type of feldspar and calcite have rhombohedral cleavage.

    eduncle-logo-app

    But sanidine also has cleavages intersecting at 90 degrees right? Sir please correct me if I m stating wrongly.

  • comment-profile-img>
    Sajan sarthak best-answer

    it's a pyroxene that is diopside 87 and 93 are the angles

    eduncle-logo-app

    But sanidine too has cleavages intersecting at 90 degrees right? Correct me if I am wrong.

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