Crystal Chemistry of Three Volcanic K-rich Nepheline Samples From Oldoinyo Lengai, Tanzania and Mount Nyiragongo, Eastern Congo, Africa

Crystal Chemistry of Three Volcanic K-rich Nepheline Samples From Oldoinyo Lengai, Tanzania and Mount Nyiragongo, Eastern Congo, Africa

Natural nepheline (Nph) samples are intermediate members of solid solutions that extend from the pure Na end-member Na[AlSiO4] to the pure K end-member K[AlSiO4] (=kalsilite, Kls). We examined two volcanic nepheline (ideally, K2Na6[Al8Si8O32] or Nph0.75Kls0.25) samples from Oldoinyo Lengai, Tanzania...

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Bibliographic Details
Main Authors: Sytle M. Antao, James W. Nicholls
Format: Article
Language:English
Published: Frontiers Media S.A. 2018-10-01
Series:Frontiers in Earth Science
Subjects:
volcanic K-rich nepheline
kalsilite
crystal structure
Al-Si order
HRPXRD
intergrowths
Online Access:https://www.frontiersin.org/article/10.3389/feart.2018.00155/full

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https://www.frontiersin.org/article/10.3389/feart.2018.00155/full

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