Premium
Transformation Enthalpies of the TiO 2 Polymorphs
Author(s) -
MITSUHASHI T.,
KLEPPA O. J.
Publication year - 1979
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.1151-2916.1979.tb19077.x
Subject(s) - brookite , rutile , anatase , calorimetry , chemistry , standard enthalpy of formation , enthalpy , mineralogy , transformation (genetics) , materials science , thermodynamics , organic chemistry , photocatalysis , physics , biochemistry , gene , catalysis
The enthalpies of transformation of pure, well‐characterized samples of brookite and anatase to rutile were determined by solution calorimetry in a 3Na 2 O·4MoO 3 melt at 971 ±2 K. The experiments gave the following results: brookite→rutile, ΔH° 971 = ‐0.17±0.09 kcal mol −1 ; anatase → rutile, ΔH° 971 = ‐0.78±0.20 kcal mol −1 .