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Structure and Microtexture Changes in Phosphorous‐Bearing Ca 2 SiO 4 Solid Solutions
Author(s) -
Fukuda Koichiro,
Maki Iwao,
Ito Suketoshi,
Yoshida Hideto,
Aoki Katsumi
Publication year - 1994
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.1151-2916.1994.tb04651.x
Subject(s) - orthorhombic crystal system , crystal (programming language) , phase (matter) , crystal structure , materials science , crystallography , hexagonal crystal system , wavelength , volume fraction , hexagonal phase , microstructure , analytical chemistry (journal) , chemistry , optoelectronics , organic chemistry , computer science , composite material , programming language , chromatography
The crystal structure and microtexture of P‐bearing Ca 2 SiO 4 solid solutions (C 2 S( ss )) were studied as a function of x = P/(Si + P) ranging from 0.085 to 0.398. All the samples were prepared at the stable‐temperature region of the α′ l ‐phase and quenched in air. The structures were described in terms of the orthohexagonal or hexagonal cell of the former α‐phase. The crystal with x = 0.085 was composed entirely of the orthorhombic α′ l ‐phase, the modulation wavelength of which was N = 3 along the c ‐axis. With x = 0.118 and 0.156, the crystal grains were made up of both α′ l and incommensurate orthorhombic phases. The volume fraction of the α′ l ‐phase decreased with increasing x . With x = 0.197, the crystal was made up exclusively of the incommensurate phase, with the modulation wave vector k given by (1/ N ) a * + c * . A good correlation N = 4.370 – 2.50 x was observed between N (3.75 ≤ N ≤ 4.09) and x (0.118 ≤ x ≤ 0.250). The crystal with x = 0.3.98 consisted of a single hexagonal phase. The modulation wavelength was N = 2 along the a‐axis and N = 3 along the c ‐axis.