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Hydrothermal Synthesis and Morphology of Thomsonite and Edingtonite
Author(s) -
Ghobarkar H.,
Schäf O.
Publication year - 1997
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.2170320508
Subject(s) - orthorhombic crystal system , hydrothermal circulation , hydrothermal synthesis , mineralogy , mineral , zeolite , crystallography , morphology (biology) , chemistry , atmospheric temperature range , group (periodic table) , materials science , crystal structure , geology , physics , metallurgy , thermodynamics , organic chemistry , catalysis , paleontology , seismology
The hydrothermal treatment of different glasses of the composition 2 Na 2 O–8 CaO–10 Al 2 O 3 – 20 SiO 2 and 2 BaO–2 Al 2 O 3 –6 SiO 2 at one kilobar pressure in a temperature‐range between 80 °C and 230 °C lead to the formation of the zeolite‐minerals thomsonite (orthorhombic symmetry space‐group Pbmn, a = 13.05 Å, b = 13.09 Å and c = 13.22 Å), and edingtonite (orthorhombic symmetry, space‐group: P2,2,2, a = 9.55 Å, b = 9.67 Å and c = 6.52 Å). Under the chosen hydrothermal conditions both mineral phases are formed in the whole temperature interval.