René Just Haüy

René Just Haüy
Born28 February 1743
Died1 June 1822(1822-06-01) (aged 79)
Paris, France
NationalityFrench
Occupationmineralogist

René Just Haüy (French pronunciation: [aɥi]) FRS MWS FRSE (28 February 1743 – 1 June 1822) was a French priest and mineralogist, commonly styled the Abbé Haüy after he was made an honorary canon of Notre Dame. Due to his innovative work on crystal structure and his four-volume Traité de Minéralogie (1801), he is often referred to as the "Father of Modern Crystallography". During the French Revolution he also helped to establish the metric system.