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El espesor de las preparaciones microscópicas (láminas delgadas) debe estarentre 20 y 30 micras para que las propiedades ópticas de los minerales se manifiesten correctamente. En ocasiones el espesor de la preparación es demasiado grueso o demasiado fino.



Con frecuenciala lámina de suelo que se está desgastando se inclina con respecto a la superficie del abrasivo y como resultado la preparación resultante presenta zonas con diferente espesor. En otras situacioneshay zonas más blandas que se desgastan más que las demás.

Como resultado las zonas más delgadas aparecen con colores y birrefringencias más débiles.dkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkkk-
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