Ostwald may refer to: * Friedrich

Wilhelm Ostwald Friedrich Wilhelm Ostwald (; 4 April 1932) was a Baltic German chemist and philosopher. Ostwald is credited with being one of the founders of the field of physical chemistry, with Jacobus Henricus van 't Hoff, Walther Nernst, and Svante Arrhen ...

, the physico-chemist (awarded the Nobel Prize in Chemistry, 1909) #

Ostwald's rule In materials science, Ostwald's rule or Ostwald's step rule, conceived by Wilhelm Ostwald, describes the formation of polymorphs. The rule states that usually the less stable polymorph crystallizes first. Unstable polymorphs more closely resemble ...

of polymorphism: in general, the least stable polymorph crystallizes first # The

Ostwald Process The Ostwald process is a chemical process used for making nitric acid (HNO3). Wilhelm Ostwald developed the process, and he patented it in 1902. The Ostwald process is a mainstay of the modern chemical industry, and it provides the main raw materi ...

, a synthesis method for making nitric acid from ammonia #

Ostwald ripening Ostwald ripening is a phenomenon observed in solid solutions or liquid sols that describes the change of an inhomogeneous structure over time, i.e., small crystals or sol particles dissolve, and redeposit onto larger crystals or sol particles ...

, a crystallization effect #

Ostwald color system In colorimetry, the Ostwald color system is a color space that was invented by the Baltic German chemist Wilhelm Ostwald. Associated wit''The Color Harmony Manual'' it comprises a set of paint chips representing the Ostwald color space. There ar ...

Wolfgang Ostwald Carl Wilhelm Wolfgang Ostwald (27 May 1883 – 22 November 1943) was a German chemist and biologist researching colloids. Ostwald was born in Riga, the son of the 1909 winner of the Nobel Prize in Chemistry, Wilhelm Ostwald, and died in Dr ...

, chemist and biologist, son of Friedrich Wilhelm Ostwald. He studied colloids *

Martin Ostwald Martin Ostwald (January 15, 1922 – April 10, 2010) was a German-American classical scholar, who taught until 1992 at Swarthmore College and the University of Pennsylvania. His main field of study was the political structures of Ancient Greece. ...

, a German-American classical scholar *

Ostwald (crater) Ostwald is a lunar impact crater on the far side of the Moon. It lies just to the east of the crater Guyot, and near the northern border of Ibn Firnas. Recht lies along its eastern rim. This is a worn and eroded crater formation with an irregul ...

, a crater on the far side of the Moon *

Ostwald, Bas-Rhin Ostwald (; Alsatian: ''Oschwold'') is a commune in the Bas-Rhin department in Grand Est in north-eastern France. History The ancient name of Ostwald, Wickersheim, is first attested on a map of the emperor Charles the Fat in 884. In the time ...

, a commune in the Bas-Rhin ''département'' in France

See also