Arnould Carangeot
French naturalist and mineralogist (1742-1806)
Arnould Carangeot (12 March 1742 – 16 December 1806) was a French naturalist and mineralogist who invented one of the first goniometers for measuring the angles of the faces of crystals. Through its use came about the first ideas in crystallography on the constancy of the dihedral angles and symmetry of crystals of specific chemicals.
As an assistant to Jean-Baptiste Romé de L'Isle he examined crystals to make clay models and invented the goniometer in 1780. This led to Romé de L'Isle establishing the law of constancy of interfacial angles, a slight advance over Steno's idea that the interfacial angles were constant for a given substance.
He also contributed to a work on the butterflies of Europe.
“Arnould Carangeot” enters the record as french naturalist and mineralogist (1742-1806). Crown Archives preserves that source wording while asking what Arnould, Carangeot and French can confirm, complicate or overturn.
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This entry incorporates text from “Arnould Carangeot” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.