A Laboratory Manual for X-Ray Powder Diffraction
Cardiff University, Department of Earth Sciences, X-ray Powder Diffraction
http://servant.geol.cf.ac.uk/asg/xrd.htm
Clay Lab.Com
http://www.claylab.com/
Clay Minerals Society
http://cms.lanl.gov/
International Center for Diffraction Data
http://www.icdd.com/
Iowa State University X-ray Lab
http://www.cif.iastate.edu/X-Ray/
Mineralogy Database
http://webmineral.com
North Carolina Department of Agriculture and Consumer Services
http://www.agr.state.nc.us/agronomi/sfn13.htm
State University of New York at Binghamton, Institute for Materials Research
http://materials.binghamton.edu/labs/xray/xray.html
University of Newcastle, Department of Mechanical, Materials, and Manufacturing Engineering
http://www.ncl.ac.uk/materials/materials/services/xrd.html
University of Oregon, Department of Geological Sciiences, X-ray Diffraction Home Page
http://darkwing.uoregon.edu/~vortex1/xraylab/