RGB color table
August 21, 2017
http://civilyarou.web.fc2.com/WANtaroHP_F90_html5/esubGPLcol.html
COMPUTATIONAL MATERIALS REPOSITORY
March 6, 2017
Bilbao Crystallographic Server
March 6, 2017
http://www.cryst.ehu.es/cryst/get_kvec.html
American Mineralogist CrystaL Structure Database
March 6, 2017
http://rruff.geo.arizona.edu/AMS/amcsd.php