Which of the following is true for a cubic crystal system?
- A$a \ne b \ne c, \alpha = \beta = \gamma = 90^o$
- B$a = b = c, \alpha = \beta = \gamma = 90^o$
- C$a = b \ne c, \alpha = \beta = 90^o, \gamma = 120^o$
- D$a \ne b \ne c, \alpha \ne \beta \ne \gamma \ne 90^o$
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Similar Questions
Which primitive unit cell has unequal edge length $(a \ne b \ne c)$ and all axial angles different from $90^{\circ}$?
The total number of Bravais lattices is ........... .
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View SolutionMost crystals show good cleavage because their atoms,ions or molecules are
MediumAIPMT 1991
View SolutionMatch the crystal system/unit cells mentioned in Column $I$ with their characteristic features mentioned in Column $II$.
Column $I$ Column $II$ $(A)$ Simple cubic and face-centred cubic $(p)$ have these cell parameters $a=b=c$ and $\alpha=\beta=\gamma=90^{\circ}$ $(B)$ Cubic and rhombohedral $(q)$ are two crystal systems $(C)$ Cubic and tetragonal $(r)$ have only two crystallography angles of $90^{\circ}$ $(D)$ Hexagonal and monoclinic $(s)$ belong to same crystal system
| Column $I$ | Column $II$ |
| $(A)$ Simple cubic and face-centred cubic | $(p)$ have these cell parameters $a=b=c$ and $\alpha=\beta=\gamma=90^{\circ}$ |
| $(B)$ Cubic and rhombohedral | $(q)$ are two crystal systems |
| $(C)$ Cubic and tetragonal | $(r)$ have only two crystallography angles of $90^{\circ}$ |
| $(D)$ Hexagonal and monoclinic | $(s)$ belong to same crystal system |
DifficultIIT 2007
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