Polymorphisme des solutions solides du sodium dans l'aluminate tricalcique | Zendy

Regourd M. | Zendy; Chromy S. | Zendy; Hjorth L. | Zendy; Mortureux B. | Zendy; Guinier A. | Zendy

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Polymorphisme des solutions solides du sodium dans l'aluminate tricalcique

Author(s) -

Regourd M.,

Chromy S.,

Hjorth L.,

Mortureux B.,

Guinier A.

Publication year - 1973

Publication title -

journal of applied crystallography

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.429

H-Index - 162

ISSN - 1600-5767

DOI - 10.1107/s0021889873008885

Subject(s) - tetragonal crystal system , orthorhombic crystal system , crystallography , solid solution , materials science , cubic form , quenching (fluorescence) , chemistry , crystal structure , physics , mathematics , optics , combinatorics , metallurgy , fluorescence

Three crystalline forms (cubic, orthorhombic I and orthorhombic II) exist in the Na 2 O–Ca 3 Al 2 O 6 solid‐solution series at room temperature. A tetragonal form may be obtained by quenching. All the phases have lattices extremely close to the cubic form. The cubic and tetragonal varieties show no polymorphic transformations. The orthorhombic O I and O II phases become tetragonal at high temperature. There is complete agreement between the transition points revealed by X‐ray diffraction and microscopy. However, only the order–disorder O II → T transition is observed by μDTA.

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