๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

Molar heat capacity and thermodynamic functions of zirconolite CaZrTi2O7

โœ Scribed by B.F. Woodfield; J. Boerio-Goates; J.L. Shapiro; R.L. Putnam; A. Navrotsky

Publisher
Elsevier Science
Year
1999
Tongue
English
Weight
138 KB
Volume
31
Category
Article
ISSN
0021-9614

No coin nor oath required. For personal study only.

โœฆ Synopsis

Zirconolite (CaZrTi 2 O 7 ) has been proposed as a host phase for excess weapons plutonium, and the standard molar entropy 298.15 K 0 S o m and other derived thermodynamic functions are needed to describe it completely. The heat capacity of CaZrTi 2 O 7 has been measured from T โ‰ˆ 20 K to T โ‰ˆ 400 K with an adiabatic calorimeter. A six-term fitting equation based on Debye and Einstein functions has been shown to represent the heat capacity over the entire range of temperature to within the experimental uncertainty. This equation has been used to calculate the thermodynamic functions to T = 400 K and to extrapolate these functions to T = 1500 K. In particular, 298.15 K 0 S o m for CaZrTi 2 O 7 is 193.3 J โ€ข K -1 โ€ข mol -1 .

๐Ÿ“œ SIMILAR VOLUMES

Molar heat capacity and thermodynamic fu
Molar heat capacity and thermodynamic functions forCaTiO3
โœ B.F. Woodfield; J.L. Shapiro; R. Stevens; J. Boerio-Goates; R.L. Putnam; K.B. He ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 201 KB

Calcium titanate, CaTiO 3 , has appeared as a significant impurity in the synthesis of several ceramic host materials for the disposal of excess weapons grade plutonium and uranium. Previously reported heat capacities on CaTiO 3 extend only to T = 50 K. Also, the agreement of the low-temperature hea

Molar heat capacity and thermodynamic fu
Molar heat capacity and thermodynamic functions of the type II antiferromagnet MnO
โœ Jennifer L. Shapiro; Brian F. Woodfield; Rebecca Stevens; Juliana Boerio-Goates; ๐Ÿ“‚ Article ๐Ÿ“… 1999 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 283 KB

The heat capacity of a polycrystalline sample of MnO was measured from T โ‰ˆ 1 K to T โ‰ˆ 400 K using two different experimental apparatuses. Features revealed by the data include a hyperfine contribution due to the Mn nuclei, a T 2 temperature dependence at low temperatures due to the type II antiferro