Course Outline - May 2023
Chapter-1 Introduction to Crystallography and Mineral Optics
Chapter-2 Crystal Symmetry, Systems and Classes
Chapter-3 General Mathematical Relations of Crystals
Chapter-4 Habit and Features of Real Crystals
Chapter-5 Physical Properties of Minerals
Chapter-6 Optical Mineralogy
Answer for class work:
Model-5 (yellow color):-
.There are three possible rotational axes.
1A ----- 2 fold on c axis
1A ----- 2 fold on a axis
1A ----- 2 fold on b axis
=> Three (3) mirror planes and the model has center of symmetry (i) i.e.
=> Symmetry: i, 3A2, 3m
=> All the possible rotational axes are different in length and each are perpendicular to one of the mirror planes; thus, the Hermann-Muaguin symbol for the model is:-
2/m2/m2/m
=> System: Orthorhombic
=> Class: Rhombic-dipyramidal
Model-6 (Blue color)
in this model pairs of faces are related to each other through center of symmetry -> i
=> the Hermann-Muaguin symbol -> 1 bar
=> System: Triclinic
=> Class: Pinacoidal.
Power Points (ppt)
Introduction to crystallography and mineral optics
Crystal symmetry and classes
General mathematical relations of crystals
Habit and features of real crystals
Physical property of crystals
Optical property of crystals