Gurmeet Singh posted an Question
November 11, 2020 • 02:26 am 30 points
  • IIT JAM
  • Geology (GG)

Question in optional part

If i have 2 m m Means, crystal have 2 fold rotation symmetry and 1st m means usi axis me mirror symmetric hoga Other m means us axis k perpendicular bhi mirror symmetric hoga What if it is 2/m m m

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

    2 m m means it comes under orthorhombic system point group. it has 222 & 2/m 2/m 2/m other one point group 2 fold rotational axis m - mirror plane perpendicular to second 2 fold axis..note that not parallel m: mirror plane perpendicular to 3rd 2 fold axis i.e C axis. if you hypothetically creating a symbol like 2/m m m then 2 fold rotational axis and a perpendicular mirror plane to it. m:- mirror plane perpendicular to b axis m:- mirror plane perpendicular to c axis

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