Name the following crystallographic features below using proper crystallographic notation.

Image One
[2ˉ21]
[1ˉ12ˉ]
[1ˉ1(1/2)]
[(1/2)(1/2ˉ)1ˉ]

Image 2
(1ˉ02)
(21ˉ0)
(201)
(1ˉ02ˉ)

The wrong answer as far I known in Image One:[(1/2)(1/2ˉ)1ˉ] Image 2:(1ˉ02) is not the Right Answer. Any idea what it is!

1) b

For the online course,

1)b and 2)c

Thank you.

No problem :)

Thanks

how about the idea?

Based on the provided crystallographic notations, let's first address any corrections for the wrong answers:

In Image One:
[(1/2)(1/2ˉ)1ˉ] is incorrect.

In Image Two:
(1ˉ02) is also incorrect.

To determine the correct answer, we can break down the crystallographic notation:

In crystallographic notation, the symbols within square brackets [ ] depict a particular direction, whereas the symbols within parentheses ( ) represent a plane.

For Image One:
[2ˉ21] denotes a direction with coordinates (2, -2, 1).
[1ˉ12ˉ] denotes a direction with coordinates (1, -1, -2).
[1ˉ1(1/2)] denotes a direction with coordinates (1, -1, 0.5).
[(1/2)(1/2ˉ)1ˉ] is incorrect.

For Image Two:
(1ˉ02) is incorrect.
(21ˉ0) denotes a plane with Miller indices (2, -1, 0).
(201) denotes a plane with Miller indices (2, 0, 1).
(1ˉ02ˉ) denotes a plane with Miller indices (1, -2, 0).

To determine if there are any additional errors or if you are looking for the correct notation for a specific crystallographic feature, please provide further details or specific coordinates for clarification.