摘要
研究了Li^+,Mg^2+/SO_4^(2-),B_4O_7^(2-)—H_2O四元交互体系25℃时的溶解度和溶液的密度及折光率.四种原始组份未发生脱水作用,体系中也没有复盐或固溶体形成.体系25℃溶解度等温线由五段组成,有四个结晶区,分别对应于四种原始组份,其中以MgB_4O_7·9H_2O的结晶区最大.溶解度等温线上有两个零变量点,其一为MgB_4O_7·9H_2O,MgSO_4·7H_2O,Li_2SO_4·H_2O三盐共饱点,另一为MgB_4O_7·9H_2O,Li_2B_4O_7·3H_2O,Li_2SO_4·H_2O三盐不相称共饱点.
Solubilities and properties (density, refractive index) of solution were studied in the reciprocal system Li+,Mg2+ / B4O72-,S42--H2O at 25℃. No double salt is found and dehydration of cither of the original components docs not occur in the system. The solubility isotherm of the system consists of five branches and has four crystallization areas, corresponding to the four original salts, the largest of which belongs to MgB4O7 · 9H2O. The system has two invariant points, one is the cutonic point of MgB4O7 · 9H2O+MgSO4 · 7H2O+Li2SO4 · H2O and the other is the incongrucnt cutonic point of MgB4O7 · 9H2O+Li2B4O7 · 3H2O+Li2SO4 · H2O.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
1991年第3期344-348,共5页
Chinese Journal of Inorganic Chemistry
基金
中国科学院科学基金资助课题
关键词
四硼酸镁
章氏硼镁石的溶解度
magnesium tetraborate
solubility of Hungtsaoite
