Hi Folks;(adsbygoogle = window.adsbygoogle || []).push({});

Trying to run an ewald summation to create a crystal field for a Gaussian98 calculation. Problem is the input file wants crystal translation vectors, but my structure data is in terms of a,b,c alpha beta gamma. It's been a while, how does one go between the two notations? Are the alpha beta gamma the direction cosines?

sorry if this is a stupid question

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Crystallographic notation

**Physics Forums | Science Articles, Homework Help, Discussion**