Low-temperature heat capacity of α and γ polymorphs of glycine

被引：47

作者：

Drebushchak, VA

Kovalevskaya, YA

Paukov, IE

Boldyreva, EV

机构：

[1] Russian Acad Sci, SB, Inst Mineral & Petrog, Novosibirsk 630090, Russia

[2] Novosibirsk State Univ, Mol Design & Ecol Safe Technol REC 008, Novosibirsk 630090, Russia

[3] Russian Acad Sci, SB, Inst Inorgan Chem, Novosibirsk 630090, Russia

[4] RAS, SB, Inst Solid State Chem & Mechanochem, Novosibirsk 630128, Russia

来源：

JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2003年 / 74卷 / 01期

基金：

俄罗斯基础研究基金会;

关键词：

adiabatic calorimetry; Gibbs free energy; glycine; heat capacity; polymorphism;

D O I：

10.1023/A:1026377703260

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

Low-temperature heat capacity of two polymorphs of glycine (alpha and gamma) was measured from 5.5 to 304 K and thermodynamic functions were calculated. Difference in heat capacity between polymorphs ranges from +26% at 10 K to -3% at 300 K. The difference indicates the contribution into the heat capacity of piezoelectric gamma polymorph, probably connected with phase transition and ferroelectricity. Thermodynamic evaluations show that at ambient conditions gamma polymorph is stable and alpha polymorph is metastable.

引用

页码：109 / 120

页数：12

共 50 条

[31] Low-Temperature Heat Capacity of Rubidium Tetrafluoroborate
Gavrichev, K. S.
Gorbunov, V. E.
Golushina, L. N.
Totrova, G. A.
Russian Journal of Inorganic Chemistry, 41 (12):
[32] Low-temperature heat capacity of dysprosium diboride
Novikov, V. V.
Matovnikov, A. V.
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY, 2007, 88 (02) : 597 - 599
[33] Low-temperature heat capacity of yttrium orthotantalate
Ryumin, M. A.
Sazonov, E. G.
Guskov, V. N.
Nikiforova, G. E.
Gagarin, P. G.
Guskov, A. V.
Gavrichev, K. S.
Baldaev, L. Kh.
Mazilin, I. V.
Golushina, L. N.
INORGANIC MATERIALS, 2016, 52 (11) : 1149 - 1154
[34] Low-temperature heat capacity of yttrium orthotantalate
M. A. Ryumin
E. G. Sazonov
V. N. Guskov
G. E. Nikiforova
P. G. Gagarin
A. V. Guskov
K. S. Gavrichev
L. Kh. Baldaev
I. V. Mazilin
L. N. Golushina
Inorganic Materials, 2016, 52 : 1149 - 1154
[35] LOW-TEMPERATURE HEAT-CAPACITY OF UREA
ANDERSSON, O
MATSUO, T
SUGA, H
FERLONI, P
INTERNATIONAL JOURNAL OF THERMOPHYSICS, 1993, 14 (01) : 149 - 158
[36] Low-temperature heat capacity and magnetization of ferromagnets
V. V. Novikov
Physics of the Solid State, 2009, 51 : 2101 - 2104
[37] Low-Temperature Heat Capacity of Lanthanum Hafnate
Guskov, V. N.
Gagarin, P. G.
Guskov, A. V.
Tyurin, V. V.
Gavrichev, K. S.
RUSSIAN JOURNAL OF INORGANIC CHEMISTRY, 2019, 64 (11) : 1436 - 1441
[38] LOW-TEMPERATURE HEAT-CAPACITY OF TUNGSTEN BORIDES
BOLGAR, AS
BLINDER, AV
NOVOSELETSKAYA, LM
KLOCHKOV, LA
LYASHCHENKO, AB
ZHURNAL FIZICHESKOI KHIMII, 1988, 62 (02): : 510 - 513
[39] Low-temperature heat capacity of 1-bromoperfluorooctane
Varushchenko, RM
Druzhinina, AI
Sorkin, EL
JOURNAL OF CHEMICAL THERMODYNAMICS, 1997, 29 (06): : 623 - 637
[40] Low-temperature heat capacity of heulandite: comparison with clinoptilolite
Drebushchak, VA
Naumov, VN
Nogteva, VV
Belitsky, IA
Paukov, IE
THERMOCHIMICA ACTA, 2000, 348 (1-2) : 33 - 40

← 1 2 3 4 5 →