# Miller indices

1. Jan 28, 2006

### JSBeckton

I'm not exactly sure what to do here after I find the direction, can anyone help me out? Thanks:

Sketch the $$\left[ {0\overline 1 1} \right]$$ direction. Which {110} and {111} plane(s) does it lie in?

2. Jan 28, 2006

### FredGarvin

That is a poorly worded question. I can't remember being asked a question like that with regard to miller indicies. It's pretty obvious to get the direction, but I really don't understand what they are looking for in the second part either. Unless they are eluding to the notion that parallel planes have the same indicies...Maybe a read of this thread may help. Astronuc is the man!

3. Jan 28, 2006

### inha

The sketching part is simple. Draw a cartesian coordinate system and use the definitions of the indices. I can't understand the second question either.

4. Jan 28, 2006

### JSBeckton

I don't understand it either and my test is on monday! (this is a practice test) There is a 3rd part thats kinda confusing too, he did not do any of this stuff in class:

What are the indices of the four directions of the form <111> that lie in the $$\left( {\overline 1 01} \right)$$ plane of a cibic cell?