title: [The comminution of fibrous and prismatic tremolites: the effect on the diffractometric response].
abstract: The aim of the present work is to study the comminution of tremolite contained in an acid-washed dolomite sample and in a New York talc sample using a gentle, wet, comminution technique. Tremolite in acid-washed dolomite shows a fibrous habit of a length/diameter ratio greater than 10/1; on the contrary, tremolite particles in the New York talc have a quite acicular or prismatic habit of a length/diameter ratio in general less than 3/1. For both tremolite types, the diffractometric responses follow trends similar and are well correlated to the comminution degree. Results confirm that the comminution of amphibolic asbestos is a crucial step for the quantitative determination of this substance by electronic or light microscopy and X-ray diffractometry.
authors.affiliation: Laboratorio di Ultrastrutture, Istituto Superiore di Sanità, Roma.
authors.forename: L
authors.initials: L
authors.lastname: Paoletti
authors.forename: S
authors.initials: S
authors.lastname: Puledda
authors.forename: M
authors.initials: M
authors.lastname: Ferdinandi
mesh_terms: D017636:Asbestos, Amphibole / Q000032:analysis*; D002119:Calcium Carbonate / Q000032:analysis; D008274:Magnesium / Q000032:analysis; D008903:Minerals / Q000032:analysis; D013627:Talc / Q000032:analysis; D013997:Time Factors; D014961:X-Ray Diffraction / Q000295:instrumentation / Q000379:methods
chemical_list: D017636:Asbestos, Amphibole; D008903:Minerals; C005846:tremolite; D013627:Talc; D002119:Calcium Carbonate; D008274:Magnesium; C028042:calcium magnesium carbonate