WebMar 8, 1996 · The construction of semiquantitative energy/temperature (E/T) diagrams is discussed on the basis of thermodynamic equations. An E/T diagram describes the temperature dependence of the enthalpy and the Gibbs free energy of polymorphs. Knowledge of the E/T diagram of a compound permits the prediction of relative … WebMIN-Fakultät Fachbereich Informatik Verteilte Systeme und Informationssysteme (VSIS). VSIS; Personen. Mitarbeiter; Ehemalige Mitarbeiter; Forschung. Forschungschwerpunkt
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WebEines der Standardwerke der Werkstoffwissenschaft - jetzt in Neuauflage und vollständig überarbeitet. Der 'state of the art' des Gebiets, kompetent aufbereitet für Metallografen, Werkstoffprüfer, Metallwissenschaftler, Mit einer Einführung in die Keramografie, , Buch In materials science, polymorphism describes the existence of a solid material in more than one form or crystal structure. Polymorphism is a form of isomerism. Any crystalline material can exhibit the phenomenon. Allotropy refers to polymorphism for chemical elements. Polymorphism is of practical relevance to … See more Many compounds exhibit polymorphism. It has been claimed that "every compound has different polymorphic forms, and that, in general, the number of forms known for a given compound is proportional to the time and money … See more According to Ostwald's rule, usually less stable polymorphs crystallize before the stable form. The concept hinges on the idea that unstable polymorphs more closely resemble the … See more Polytypes are a special case of polymorphs, where multiple close-packed crystal structures differ in one dimension only. Polytypes have identical close-packed planes, but … See more • Isomorphism (crystallography) • Dimorphism (Wiktionary) • Polyamorphism See more Drugs receive regulatory approval for only a single polymorph. In a classic patent dispute, the GlaxoSmithKline defended its patent for the polymorph type II of the active ingredient in Zantac against competitors while that of the polymorph type I had already … See more In terms of thermodynamics, two types of polymorphic behaviour are recognized. For a monotropic system, plots of the free energies of the … See more • "Small Molecule Crystallization" (PDF) at Illinois Institute of Technology website • "SiC and Polytpism" See more WebVon Vollmilch bis Bitter, edelste Polymorphie Chemie in unserer Zeit, 39 (6): 416. Acknowledgments. Technical assistance of S. Matern is gratefully acknowledged. The authors thank Drs. H. Schmitz and C. Kwik-Uribe, Mars Inc., for supplying the cocoa drinks and Dr. Stanton A. Glantz, University of California San Francisco, for statistical advice. citizen food court