title: [An unusual crystallographic aspect of a cholesterol biliary calculus. Optic and x-ray diffractometric study].
abstract: The unusual crystallographic appearance of a pure cholesterol calculus is described. Optical and X-ray diffraction data are presented in an initial note. A thorough physical and chemical investigation of the mechanism that led to the formation of this calculus and its particular appearance and shape will be reported in a subsequent paper.
mesh_terms: D000328:Adult; D002769:Cholelithiasis / Q000209:etiology; D002784:Cholesterol; D003461:Crystallography; D005260:Female; D006801:Humans; D014961:X-Ray Diffraction
chemical_list: D002784:Cholesterol
vernacular_title: A proposito di un raro aspetto cristallografico di un calcolo biliare di colesterolo. Studio ottico e roentgendiffrattiometrico