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CRYSTALLOGRAPHY TRIVIA ROUND 2!
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Round 2 – Question 1 Excluding AB, crystal faces will
most likely occur along which lattice plane?
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Round 2 – Question 2 What does Steno’s Law of Interfacial Angles state?
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Round 2 – Question 3 What does the crystal growth illustration to the left indicate? lattice plane a has a higher atomic density than o, Lattice plane o has a higher growth rate than a, or 111 faces are only common in large, mature crystals
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Round 2 – Question 4 The crystallographic axes shown below are indicative of what crystal system?
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Round 2 – Question 5 How are crystallographic axes different between the orthorhombic and tetragonal systems?
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Round 2 – Question 6 What crystal face would qualify as the “unit face” in this orthorhombic crystal? (give face intercepts)
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Round 2 – Question 7 What is the Miller Index for the upper face?
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Round 2 – Question 8 What is the Miller index of the shaded face in this hexagonal crystal?
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Round 2 – Question 9 Faces b, m, and a belong to what zone? [_ _ _]
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Round 2 – Question 10 What is the form index of the p face? {_ _ _}
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End of Round 2 Pass your answers to the team on your right for grading.
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Round 2 – Question 1 Excluding AB, crystal faces will
most likely occur along which lattice plane? AC
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Round 2 – Question 2 What does Steno’s Law of Interfacial Angles state? For a particular mineral, the angle between adjacent faces will be constant regardless of crystal shape or size.
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Round 2 – Question 3 What does the crystal growth illustration to the left indicate? lattice plane a has a higher atomic density than o, Lattice plane o has a higher growth rate than a, or 111 faces are only common in large, mature crystals
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Round 2 – Question 4 The crystallographic axes shown below are indicative of what crystal system? Hexagonal
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Round 2 – Question 5 How are crystallographic axes different between the orthorhombic and tetragonal systems? The a and b axes in the tetragonal system are the same length, but are different in orthorhombic crystals.
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Round 2 – Question 6 What crystal face would qualify as the “unit face” in this orthorhombic crystal? (give face intercepts) 1a: 1b: 1c
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Round 2 – Question 7 What is the Miller Index for the upper face?
(113)
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Round 2 – Question 8 What is the Miller index of the shaded face in this hexagonal crystal? (1120)
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Round 2 – Question 9 Faces b, m, and a belong to what zone? [001]
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Round 2 – Question 10 What is the form index of the p face? {111}
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