Multiple melting of orientationally disordered mixed crystals of the two-component system (CH3)2CCl2-(CH3)CCl3

被引:9
作者
Pardo, LC
Barrio, M
Tamarit, JLI
Salud, J
López, DO
Negrier, P
Mondieig, D
机构
[1] Univ Politecn Cataluna, ETSEIB, Dept Fis & Engn Nucl, E-08028 Barcelona, Catalonia, Spain
[2] Univ Bordeaux 1, Ctr Phys Mol Opt & Hertzienne, CNRS, UMR 5798, F-33405 Talence, France
关键词
D O I
10.1039/b312900d
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Orientationally disordered (OD) stable and metastable mixed crystals of the two-component system 2,2-dichloropropane ((CH(3))(2)CCl(2)) + methylchloroform ((CH(3))CCl(3)) have been characterized from crystallographic and thermodynamic points of view. Continuous series of mixed crystals in the stable rhombohedral (R) phase points out an isomorphism relationship. The monotropic behavior of the non-isomorphous OD metastable phases in the pure components (simple cubic, SC, and face-centered cubic, FCC. respectively) with respect to the R stable phase is partially retained by the mixed crystals. In particular, SC mixed crystals were found persistent enough as metastable crystals in the whole composition range with the exception of the pure compound (CH(3))CCl(3), for which only the FCC metastable phase was experimentally available. On the contrary, samples with compositions greater than X = 0.70 in (CH(3))CCl(3) crystallized into either the FCC or SC, both being metastable with respect to the R phase. Thus, three kinds of OD mixed crystals appear which give rise to three independent OD + Liquid equilibria. The thermodynamic analysis of such non-interfering equilibria, [R + L], [SC + L] and [FCC + L], enables us to infer the stability relationships between the whole of OD phases.
引用
收藏
页码:417 / 423
页数:7
相关论文
共 34 条
[1]   ORIENTATIONAL ORDER IN 2-COMPONENT PLASTIC CRYSTALS 2,2-DICHLOROPROPANE-CARBON TETRACHLORIDE [J].
AKIMOV, MN ;
BEZRUKOV, OF ;
CHIKUNOV, OV ;
STRUTS, AV .
JOURNAL OF CHEMICAL PHYSICS, 1991, 95 (01) :22-27
[2]  
Andon R. J. L., 1973, Journal of the Chemical Society Faraday Transactions I, V69, P1721, DOI 10.1039/f19736901721
[3]   THE BLADE CHAMBER - A SOLUTION FOR CURVED GASEOUS DETECTORS [J].
BALLON, J ;
COMPARAT, V ;
POUXE, J .
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH, 1983, 217 (1-2) :213-216
[4]   DEGREE OF MISCIBILITY BETWEEN NONISOMORPHOUS PLASTIC PHASES - BINARY-SYSTEM NPG (NEOPENTYL GLYCOL)-TRIS [TRIS(HYDROXYMETHYL)AMINOMETHANE] [J].
BARRIO, M ;
LOPEZ, DO ;
TAMARIT, JL ;
NEGRIER, P ;
HAGET, Y .
JOURNAL OF MATERIALS CHEMISTRY, 1995, 5 (03) :431-439
[5]   Phenomenology of polymorphism .3. p,T diagram and stability of piracetam polymorphs [J].
Ceolin, R ;
Agafonov, V ;
Louer, D ;
Dzyabchenko, VA ;
Toscani, S ;
Cense, JM .
JOURNAL OF SOLID STATE CHEMISTRY, 1996, 122 (01) :186-194
[6]  
DARANAS D, 1998, WINIFIT 2 0
[7]   POTENTIAL OF THE INEL X-RAY POSITION-SENSITIVE DETECTOR - A GENERAL STUDY OF THE DEBYE-SCHERRER SETTING [J].
EVAIN, M ;
DENIARD, P ;
JOUANNEAUX, A ;
BREC, R .
JOURNAL OF APPLIED CRYSTALLOGRAPHY, 1993, 26 :563-569
[8]  
GRENBERG JH, 1996, MAT SCI ENG R, V16, P223
[9]  
JACOBS MHG, 1990, LIQFIT COMPUTER PROG
[10]   Thermodynamic consideration on a series of compounds (CH3),CCl4-n: Correlation between molecular sphericity, configurational order/disorder, and molecular packing in plastically crystalline and liquid phases [J].
Kobashi, K ;
Oguni, M .
JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (36) :7687-7694