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Solid Solutions in the System Taeniolite‐Sodium Taeniolite and Their Properties
Author(s) -
KONDO RENICHI,
DAIMON MASAKI,
ASAGA KIYOSHI,
NISHIKAWA TADAHIRO,
KITAJIMA KUNIO,
DAIMON NOBUTOSHI
Publication year - 1980
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1980.tb10646.x
Subject(s) - crystallization , solid solution , crystallite , swelling , sodium , potassium , solubility , melting point , materials science , melting temperature , mineralogy , crystallography , analytical chemistry (journal) , chemical engineering , chemistry , metallurgy , composite material , chromatography , engineering
Solid solutions in the system taeniolite (KMg 2 LiSi 4 O 10 F 2 )‐sodium taeniolite (NaMg 2 LiSi 4 O 10 F 2 ) were synthesized to study the solid solubility and swelling characteristics. Based on their melting behavior, crystals were grown for X‐ray structural analysis. A complete solid solution series does not form in this system; there are two types of micas, K‐rich taeniolite (0≤ x <0.5, x = Na/Na + K) and Na‐rich taeniolite (0.8< x ≤l). The Na‐rich taeniolite exhibits swelling properties, which become less pronounced with increasing potassium content. Melting and crystallization behavior were investigated by DTA. Solid solutions with higher sodium content melted at lower temperatures and crystallization occurred over a wide range of temperatures. To obtain larger crystals, the samples containing small crystallites were remelted at slightly above their melting points, then cooled slowly.