Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
CRYSTAL-STRUCTURE OF TRIMETHYLAMMONIUM PERCHLORATE IN 3 SOLID-PHASES INCLUDING THE IONIC PLASTIC PHASE OBTAINABLE ABOVE 480-K
Autore:
ISHIDA H; KUBOZONO Y; KASHINO S; IKEDA R;
Indirizzi:
OKAYAMA UNIV,COLL GEN EDUC,DEPT CHEM OKAYAMA 700 JAPAN OKAYAMA UNIV,FAC SCI,DEPT CHEM OKAYAMA 700 JAPAN UNIV TSUKUBA,DEPT CHEM TSUKUBA 305 JAPAN
Titolo Testata:
Zeitschrift fur Naturforschung. A, A journal of physical sciences
fascicolo: 6, volume: 49, anno: 1994,
pagine: 723 - 726
SICI:
0932-0784(1994)49:6<723:COTPI3>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOLECULAR MOTIONS; F-19 NMR; TRANSITIONS; TETRAFLUOROBORATE; H-1;
Keywords:
CRYSTAL STRUCTURE; X-RAY DIFFRACTION; THERMAL MEASUREMENTS; IONIC PLASTIC PHASE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
13
Recensione:
Indirizzi per estratti:
Citazione:
H. Ishida et al., "CRYSTAL-STRUCTURE OF TRIMETHYLAMMONIUM PERCHLORATE IN 3 SOLID-PHASES INCLUDING THE IONIC PLASTIC PHASE OBTAINABLE ABOVE 480-K", Zeitschrift fur Naturforschung. A, A journal of physical sciences, 49(6), 1994, pp. 723-726

Abstract

The crystal structures of (CH3)3NHClO4 in three solid phases were studied by X-ray diffraction techniques. X-ray powder patterns taken at ca. 500 and 445 K revealed that the plastic phase (Phase I) attainable above 480 K crystallizes in a CsCl-type cubic structure with a = 5.845(1) angstrom, Z = 1, V = 199.7 (2) angstrom3, and D(x) = 1.327 g cm-3, while Phase II, stable between 480 and 396 K, forms a tetragonal structure with a = 9.912 (4), c = 7.01 (2) angstrom, Z = 4, V = 689 (3) angstrom3, and D(x) = 1.54 g cm-3. The room temperature phase (Phase III) was studied by single crystal X-ray diffraction and found to form amonoclinic lattice with space group P2(1), a = 5.749 (1), b = 8.670 (1), c = 7.5585 (9) angstrom, beta = 102.66 (1)degrees, Z = 2, V = 367.6 (2) angstrom3, and D(x) = 1.441 g cm-3. Thermal measurements, differential thermal analysis and differential scanning calorimetry, were carried out on these solid phases, and the obtained results were compared with those observed for (CH3)3NHBF4.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 24/09/20 alle ore 10:47:32