Polymorphism in the Sc2Si2O7–Y2Si2O7 system
✍ Scribed by Alberto Escudero; María D. Alba; Ana. I. Becerro
- Publisher
- Elsevier Science
- Year
- 2007
- Tongue
- English
- Weight
- 614 KB
- Volume
- 180
- Category
- Article
- ISSN
- 0022-4596
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📜 SIMILAR VOLUMES
The enthalpy increments of Y Si O and Dy Si O have been measured by drop-calorimetry 2 2 7 2 2 7 Ž . Ž . from T s 516.7 to 928.4 K, and T s 516.7 to 918.2 K, respectively. The standard molar enthalpy of formation of monoclinic Y Si O has been deduced from its enthalpy of solution 2 2 7 . y3 . y3 T Ž
The standard molar enthalpies of solution of cerium and lanthanum silicates (b-Ce2Si2O7 and b-La2Si2O7) in (6.20 mol•dm -3 HCl + 0.147 mol•dm -3 HF) (aq) were measured. From these values the standard molar enthalpies of formation have been deduced: DfH°m(Ce2Si2O7, cr, b, 298.15 K) = -(3807.6 2 4.5)