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Title: The Coexistence of Two Sorts of Plagioclase in a Relationship of Polysynthetic Twinning
Authors: Ueda, Tateo
Tatekawa, Masahisa
Issue Date: 28-Feb-1969
Publisher: 京都大学理学部
Journal title: Memoirs of the Faculty of Science, Kyoto University. Series of geology and mineralogy
Volume: 35
Issue: 2
Start page: 139
End page: 147
Abstract: The contiguous polysynthetic twin lamellae in labradorite from Labrador and in andesine from Sannidal are not always the same sort of plagioclase. In some cases, one side lamella is built up from a high albite lattice, while the other side lamella from an intermediate plagioclase lattice, whose X-ray photograph is characterized by pairs of weak (e)-reflexions.
Appears in Collections:Vol. 35 No. 2

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