You can do this by creating a "blank" calculated field--use a space between two quotation marks. Then, place this on your view.
I tried doing that before and it doesn't allow you to put a non-numeric calculated field in between 2 numeric calculated columns.
Sorry, I didn't realize you meant between measure columns. To put a blank column between measures columns, create the following calculated field:
Make sure that it is set to Continuous. Then, place this on your view and it should work. Hope this helps!
Thank you Tracy. That worked.