Structures and phase transitions of Na2SO4

被引:87
作者
Rasmussen, SE
Jorgensen, JE
Lundtoft, B
机构
[1] Department of Inorganic Chemistry, University of Aarhus
关键词
D O I
10.1107/S0021889895008818
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Sodium sulfate, Na2SO4, has been reported to exist in five polymorphous forms labelled I-V Structure analysis has been reported on three of the polymorphs and thermal analysis on all of them. The system has been reinvestigated by differential scanning calorimetry (DSC) and by X-ray powder diffraction at several temperatures in order to examine the Na2SO4 system with the same batch of material in the same laboratory by two independent methods. The X-ray results confirm the existence of the crystalline phases labelled I, II, TLI and V but not IV. The DSC results do not entirely rule out the existence of five phases. The structure of phase II has been determined and the structures of all phases have been refined by the Rietveld method.
引用
收藏
页码:42 / 47
页数:6
相关论文
共 14 条
[1]   RELATIONSHIP OF CRYSTALLINE FORM-I, FORM-III, FORM-IV AND FORM-V OF ANHYDROUS SODIUM SULFATE AS DETERMINED BY THIRD LAW OF THERMODYNAMICS [J].
BRODALE, GE ;
GIAUQUE, WF .
JOURNAL OF PHYSICAL CHEMISTRY, 1972, 76 (05) :737-&
[2]   IONIC-CONDUCTIVITY AND THE PHASE-TRANSITIONS IN NA2SO4 [J].
CHOI, BK ;
LOCKWOOD, DJ .
PHYSICAL REVIEW B, 1989, 40 (07) :4683-4689
[3]   DIFFERENTIAL SCANNING CALORIMETRIC AND RAMAN-SPECTROSCOPIC STUDY OF POLYMORPHISM IN NA2SO4 [J].
CODY, CA ;
DICARLO, L ;
DARLINGTON, RK .
JOURNAL OF INORGANIC & NUCLEAR CHEMISTRY, 1981, 43 (02) :398-400
[4]  
DAVIES JED, 1975, J CHEM SOC DA, V19, P1912
[5]  
EYSEL W, 1973, AM MINERAL, V58, P736
[6]   CRYSTAL-CHEMISTRY AND STRUCTURE OF NA2SO4(I) AND ITS SOLID-SOLUTIONS [J].
EYSEL, W ;
HOFER, HH ;
KEESTER, KL ;
HAHN, T .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS, 1985, 41 (FEB) :5-11
[7]   The polymorphism of sodium sulfate I Themnal analysis [J].
Kracek, FC .
JOURNAL OF PHYSICAL CHEMISTRY, 1929, 33 :1281-1303
[8]   THE CRYSTAL-STRUCTURE OF NA2SO4III [J].
MEHROTRA, BN .
ZEITSCHRIFT FUR KRISTALLOGRAPHIE, 1981, 155 (3-4) :159-163
[9]   PHASE-TRANSFORMATION STUDIES ON PURE AND K-DOPED NA2SO4 [J].
MURRAY, RM ;
SECCO, EA .
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1978, 56 (20) :2616-2619
[10]   STRUCTURE OF NA2SO4(I) AT 693 K [J].
NARUSE, H ;
TANAKA, K ;
MORIKAWA, H ;
MARUMO, F ;
MEHROTRA, BN .
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE, 1987, 43 :143-146