11. Here are shown the atomic packing schemes for several different erystallographic directions for some hypothetical metal. For each direction the circles represent only those atoms contained within a unit cell, which eircles are reduced from their actual size. -0.40 nm- (100], (010) -0.50 nm- (001) -0.64 nm- (011), (101] -0.566 nm- (110] (a) To what crystal system does the unit cell belong? (b) What would this erystal structure be called?

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**11. Atomic Packing Schemes for Crystallographic Directions**

The diagram illustrates the atomic packing schemes for several crystallographic directions of a hypothetical metal. Each direction is represented by circles denoting the atoms confined within a unit cell, though the circles are not depicted in their actual size.

1. **Direction [100], [010]:**
   - The distance between atoms is 0.40 nm.
   - Two atoms are shown aligned in a straight line.

2. **Direction [001]:**
   - The distance between atoms is 0.50 nm.
   - Two atoms are shown aligned in a vertical line.

3. **Direction [011], [101]:**
   - The distance between the first and second atoms is 0.64 nm.
   - Three atoms form a straight line configuration.

4. **Direction [110]:**
   - The distance between atoms is 0.566 nm.
   - Three atoms are aligned in a row.

**Questions:**
(a) To what crystal system does the unit cell belong?
(b) What would this crystal structure be called?
Transcribed Image Text:**11. Atomic Packing Schemes for Crystallographic Directions** The diagram illustrates the atomic packing schemes for several crystallographic directions of a hypothetical metal. Each direction is represented by circles denoting the atoms confined within a unit cell, though the circles are not depicted in their actual size. 1. **Direction [100], [010]:** - The distance between atoms is 0.40 nm. - Two atoms are shown aligned in a straight line. 2. **Direction [001]:** - The distance between atoms is 0.50 nm. - Two atoms are shown aligned in a vertical line. 3. **Direction [011], [101]:** - The distance between the first and second atoms is 0.64 nm. - Three atoms form a straight line configuration. 4. **Direction [110]:** - The distance between atoms is 0.566 nm. - Three atoms are aligned in a row. **Questions:** (a) To what crystal system does the unit cell belong? (b) What would this crystal structure be called?
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