Crystallography course online

How to do crystallography?
1781 – Abbé René Just Ha\xfcy (often termed the "Father of Modern Crystallography") discovers that crystals always cleave along crystallographic planes..
Who is the father of crystallography?
Abstract.
X-ray crystallography was initiated by physicists in the early 20th century.
However—as is common with many developments in physics—the subject quickly moved beyond the confines of physics to produce key advances in chemistry, biology, mineralogy and materials science..

How to do crystallography?