The branch of chemistry that studies the chemical composition and structure of crystals and how atoms are arranged within them.
From 'crystal' (from Greek 'krystallos' meaning ice or clear stone) combined with 'chemistry' (from Arabic 'al-kimia'). The term emerged in the 19th century as microscopy advanced and scientists could study crystal structures more precisely.
Before X-ray crystallography was invented, scientists could only guess how atoms were packed inside crystals by looking at their geometric faces—but in 1912, scientists finally 'saw' inside and discovered atoms arrange in impossibly perfect patterns, which became the foundation for understanding everything from medicines to diamonds!
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