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Aragonite Transformations Observed in the Electron Microscope
Author(s) -
Burrage B. J.,
Pitkethly D. R.
Publication year - 1969
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.19690320141
Subject(s) - aragonite , calcite , electron microscope , calcium carbonate , materials science , lime , crystal (programming language) , crystallography , scanning electron microscope , mineralogy , optics , chemistry , metallurgy , composite material , physics , computer science , programming language
Abstract It is possible to observe the known transformations of aragonite to calcite to lime using an electron microscope. Aragonite undergoes a sudden and violent transformation when heated by the electron beam. Twins and dislocations disappear, leaving a strained crystal of aragonite of occasionally calcite. Further heating produces calcium oxide with a strongly preferred orientation relative to the carbonate.