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Laser‐Induced Calcite—Aragonite Transition
Author(s) -
Alam Mansoor,
DebRoy Tarasankar,
Roy Rustum
Publication year - 1990
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.1151-2916.1990.tb06581.x
Subject(s) - calcite , aragonite , decomposition , materials science , mineralogy , laser , phase (matter) , chemistry , analytical chemistry (journal) , optics , chromatography , physics , organic chemistry
High‐pressure phases of CaCO 3 , namely aragonite, calcite II, and possibly calcite III, were synthesized in air by exposing 10‐ to 20‐μm‐size particles of CaCO 3 (calcite I phase) to a CO 2 laser radiation at short pulse lengths (≤0.1 ms). The process, therefore, has the same effect as exposing the particles to at least several hundred megapascals pressure. Processing at higher pulse lengths resulted in the decomposition of CaCO 3 to CaO and CO 2 . The extent of decomposition increased with increasing pulse length.