cameroon gce A level June 2017 geology 1

cameroon gce A level June 2017 geology 1

What is the diagnostic property of this
crystal?
A Four threefold axes of symmetry
B One fourfold axis of symmetry
C Five axes of symmetry
D One four
lold vertical axis of symmetry
The crystal is best called?
A
A tetragonal bipyramid
B Octahedron
C
A bi pyramid of the second order
D Tetragonal bipyromid of the First order
What is the angle between c and ai?
A 105
B 90
C 45°
D 60

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