1.

Which of the following conditions are applied to the orthorhombic crystal structure?

A. a1=a2=a3 and α=β=\(\ddot{\gamma}\)=90
B. a1=a2≠a3 and α=β=\(\ddot{\gamma}\)=90
C. a1≠a2≠a3 and α=β=\(\ddot{\gamma}\)=90
D. a1≠a2≠a3 and α=β=\(\ddot{\gamma}\)≠90
Answer» D. a1≠a2≠a3 and α=β=\(\ddot{\gamma}\)≠90


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