Question:
The stereographic projection given below represents a
The stereographic projection given below represents a
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Stereographic projections are useful in understanding the symmetry and crystallography of minerals, especially for understanding their crystal forms.
Updated On: Dec 11, 2025
- trigonal rhombohedron
- hexagonal scalenohedron
- trigonal dipyramid
- hexagonal dipyramid
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The Correct Option is C
Solution and Explanation
Step 1: Understanding Stereographic Projections.
Stereographic projections are used to represent the symmetry of crystals. The figure shows a hexagonal dipyramid, which has a specific symmetry with the faces meeting along the hexagonal axis.
Step 2: Analyzing the options.
(A) trigonal rhombohedron: Incorrect — A trigonal rhombohedron has a different symmetry.
(B) hexagonal scalenohedron: Incorrect — This is not the correct symmetry for the given projection.
(C) trigonal dipyramid: Incorrect — This is not the correct representation for the hexagonal system.
(D) hexagonal dipyramid: Correct — This matches the symmetry of the stereographic projection shown.
Step 3: Conclusion.
The correct answer is (D) hexagonal dipyramid, as it matches the stereographic projection.
Stereographic projections are used to represent the symmetry of crystals. The figure shows a hexagonal dipyramid, which has a specific symmetry with the faces meeting along the hexagonal axis.
Step 2: Analyzing the options.
(A) trigonal rhombohedron: Incorrect — A trigonal rhombohedron has a different symmetry.
(B) hexagonal scalenohedron: Incorrect — This is not the correct symmetry for the given projection.
(C) trigonal dipyramid: Incorrect — This is not the correct representation for the hexagonal system.
(D) hexagonal dipyramid: Correct — This matches the symmetry of the stereographic projection shown.
Step 3: Conclusion.
The correct answer is (D) hexagonal dipyramid, as it matches the stereographic projection.
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