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Extinction angle vs crystal system

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wastedshadows's version from 2016-01-24 17:13

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Question Answer
Shows straight and/or symmetrical extinction. Cannot identify mineral of this system by using extinction. Triganol
Shows straight and/or symmetrical extinction. Cannot identify mineral of this system by using extinction.Tetragonal
Shows straight and/or symmetrical extinction. Cannot identify mineral of this system by using extinction.Hexagonal
Shows straight and/or symmetrical extinction only. Orthorhombic
Shows straight and/or symmetrical extinction AND inclined extinction. Monoclinic
Shows only inclined extinction Triclinic
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