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A Reexamination of the Polymorphism of Ca 3 SiO 5
Author(s) -
MIYABE H.,
ROY D. M.
Publication year - 1964
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.1151-2916.1964.tb12992.x
Subject(s) - triclinic crystal system , monoclinic crystal system , crystallography , polymorphism (computer science) , diffractometer , chemistry , crystal structure , materials science , biochemistry , genotype , gene
Polymorphic transitions in CasSiO 6 have been investigated by precise high‐temperature X‐ray diffractometer measurements and by differential thermal analyses. In addition to change caused by normal thermal expansion, three principal crystallographic transformations take place: α‐triclinic–β–triclinic (sluggish) in the range 550° to 700°C; 8‐triclinic‐monoclinic at 910°± 10°C; and monoclinic‐trigonal at 970°± 10°C. The sluggish 550° to 700° C reaction alternatively may be interpreted as two separate triclinic‐triclinic transitions, accompanied by broad endothermic heat effects at 575° and 675°C.