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Biaxial Interference
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Description: "A positive biaxial interference figure with the principal sections nearly corresponding to those of the nicols. The arrows indicate the movement taking place upon inserting a quartz wedge above the section." -Johannsen, 1908
Source: Johannsen, Albert Rock-Forming Minerals in Thin Sections (New York: John Wiley & Sons, 1908) 41
Keywords: rock-forming minerals, crystal optics, biaxial interference figure, quartz wedge, crystal movement, nicols
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