Name the parameters that characterise a unit cell.
(N/A) unit cell is characterised by six parameters:
$(i)$ The dimensions along the three edges,$a, b,$ and $c$. These edges may or may not be mutually perpendicular.
$(ii)$ The angles between the edges,which are $\alpha$ (between edges $b$ and $c$),$\beta$ (between edges $a$ and $c$),and $\gamma$ (between edges $a$ and $b$).
$(i)$ The dimensions along the three edges,$a, b,$ and $c$. These edges may or may not be mutually perpendicular.
$(ii)$ The angles between the edges,which are $\alpha$ (between edges $b$ and $c$),$\beta$ (between edges $a$ and $c$),and $\gamma$ (between edges $a$ and $b$).
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$Assertion (A)$: White tin is an example of a tetragonal system. $Reasoning (R)$: For a tetragonal system, $a=b=c$ and $\alpha=\beta=\gamma \neq 90^{\circ}$. The correct answer is
The parameters of the unit cell of a substance are $a=2.5, b=3.0, c=4.0, \alpha=90^{\circ}, \beta=120^{\circ}, \gamma=90^{\circ}$. The crystal system of the substance is :
Identify the type of unit cell containing a single particle.
Which of the following crystals has the unit cell such that $a=b \neq c$ and $\alpha=\beta=90^{\circ}$,$\gamma=120^{\circ}$?
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View SolutionIn a tetragonal crystal :-
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