Catapleiite
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Catapleiite is a dimorph of gaidonnayite rarely found by itself. Its name derives from the Greek words "κατα" and "πλειον" meaning "with more" as it is mostly accompanied by a number of rare minerals.
Catapleiite.Locality: Poudrette quarry (Demix quarry; Uni-Mix quarry; Desourdy quarry; Carrière Mont Saint-Hilaire), Mont Saint-Hilaire, La Vallée-du-Richelieu RCM, Montérégie, Québec, Canada
Monoclinic crystal system
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In crystallography, the monoclinic crystal system is one of the seven crystal systems. A crystal system is described by three vectors. In the monoclinic system, the crystal is described by vectors of
An example of the monoclinic crystal orthoclase