Habit modification of epsomite in the presence of urea

被引：10

作者：

Ramalingom, S

Podder, J

Kalkura, SN

Bocelli, G

机构：

[1] DESY, Arbeitsgrp Makromol Strukt Anal, D-22603 Hamburg, Germany

[2] Anna Univ, Ctr Crystal Growth, Madras 600025, Tamil Nadu, India

[3] Bangladesh Univ Engn & Technol, Dept Phys, Dhaka 1000, Bangladesh

[4] CNR, CS Strutturist Diffrattometr, CSSD Palazzo Chim, I-43100 Parma, Italy

来源：

JOURNAL OF CRYSTAL GROWTH | 2003年 / 247卷 / 3-4期

关键词：

metastable zonewidth; orthorhombic; tetragonal; epsomite; urea;

D O I：

10.1016/S0022-0248(02)01991-7

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The pure and urea doped epsomite (MgSO4.7H(2)O) Crystals were grown at low temperature by the slow cooling technique. The effect of pH on the growth rate of pure MgSO4.7H(2)O was studied. It was found that the higher pH values increased the growth rate and the size of the crystals. The quantity of urea present in the doped magnesium sulphate crystals was estimated. The incorporation of urea into the mother solution was found to promote the growth rate. The habit of the crystals changed from orthorhombic to tetragonal. Further, there was an increase of microhardness of the crystals on doping of urea. (C) 2002 Elsevier Science B.V. All rights reserved.

引用

页码：523 / 529

页数：7

共 50 条

[1] HABIT MODIFICATION IN SYSTEM ROCKSALT-UREA-WATER
PALM, JH
MACGILLAVRY, CH
ACTA CRYSTALLOGRAPHICA, 1963, 16 (10): : 963 - &
[2] SUCROSE CRYSTAL HABIT MODIFICATION IN PRESENCE OF IMPURITIES
MANTOVANI, G
ACCORSI, CA
VACCARI, G
ZEITSCHRIFT FUR DIE ZUCKERINDUSTRIE, 1977, 27 (05): : 286 - 290
[3] Habit modification of calcium carbonate in the presence of malic acid
Mao, Zhaofeng
Huang, Jianhua
JOURNAL OF SOLID STATE CHEMISTRY, 2007, 180 (02) : 453 - 460
[4] Microhardness studies on urea-doped solution grown single crystals of epsomite
Karan, S.
Sen Gupta, S. P.
INDIAN JOURNAL OF PHYSICS, 2006, 80 (08) : 781 - 787
[5] HEALTH-HABIT MODIFICATION
HYMAN, A
AMERICAN PSYCHOLOGIST, 1981, 36 (02) : 218 - 219
[6] Borax habit modification.
Nielsen, JA
Wolf, JH
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 2002, 223 : U658 - U658
[7] HABIT MODIFICATION OF SUCROSE CRYSTALS
MANTOVANI, G
ACCORSI, CA
VACCARI, G
ZUCKER, 1973, 26 (10): : 513 - 518
[8] A 'CONCEPTUAL' BASIS OF HABIT MODIFICATION
Nathanson, Yale S.
JOURNAL OF APPLIED PSYCHOLOGY, 1929, 13 (05) : 469 - 485
[9] Rational habit modification in consumption
Messinis, G
Henry, O
Olekalns, N
ECONOMIC MODELLING, 2002, 19 (04) : 665 - 678
[10] Mechanism and kinetics of dehydration of epsomite crystals formed in the presence of organic additives
Ruiz-Agudo, Encarnacion
Martin-Ramos, J. Daniel
Rodriguez-Navarro, Carlos
JOURNAL OF PHYSICAL CHEMISTRY B, 2007, 111 (01): : 41 - 52

← 1 2 3 4 5 →