Alfred Des Cloizeaux biography

Alfred Des Cloizeaux

Award Winner

1817 – 1897


Who was Alfred Des Cloizeaux?

Alfred Louis Olivier Legrand Des Cloizeaux was a French mineralogist.

Des Cloizeaux was born at Beauvais, in the department of Oise. He studied with Jean-Baptiste Biot at the Collège de France. He became professor of mineralogy at the École Normale Supérieure and afterwards at the Muséum National d'Histoire Naturelle in Paris. He studied the geysers of Iceland, and wrote also on the classification of some of the eruptive rocks.

His main work consisted in the systematic examination of the crystals of numerous minerals, in researches on their optical properties and on the subject of light polarization. He demonstrated the circular polarization of cinnabar.

He wrote especially on the means of determining the different feldspars, and is credited with the discovery of microcline. He named the minerals montebrasite, binnite and christianite. In 1854, Alexis Damour dedicated the mineral descloizite in honor of Des Cloizeaux.

Des Cloizeaux was elected as a member of the French Academy of Sciences in 1869, and was its President in 1889. He was awarded the Wollaston Medal by the Geological Society of London in 1886.

We need you!

Help us build the largest biographies collection on the web!

Oct 17, 1817
Also known as
  • Деклуазо, Альфред-Луи-Оливье Легран
  • École Normale Supérieure
May 6, 1897

on July 23, 2013


Use the citation below to add to a bibliography:


"Alfred Des Cloizeaux." STANDS4 LLC, 2021. Web. 2 Aug. 2021. <>.

Discuss this Alfred Des Cloizeaux biography with the community:


    Our awesome collection of

    Promoted Bios