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Hydrothermal synthesis and phase relations of the multi-component sulfide system.

多组分硫化物体系的水热合成和相关系。

基本信息

批准号：
03402020
负责人：
SHIMA Hiromi
金额：
$ 22.46万
依托单位：
Yamaguchi University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (A)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

项目摘要

The phase equilibrium relations on the following three sulfide systems have been studied by means of hydrothermal synthesis in the profect for three years. The Fe-Mn-Zn-S system, including common ore minarals of sphalerite, pyrrhotite, and alabandite, the Pb-Ag-Bi-S system of many kinds of Ag-sulfosalts minerals, and the Fe-Ni-S system containing most of Ni-ore minerals.The Fe-Mn-Zn-S system ; The phase equilibrium relations of the system have been determined at 350ﾟC under hydrothermal conditions, Sphalerite could contain considerable amount of both Fe and Mn, while alabandite contains Fe but no Zn. Wurtzite, which has been known as a high temperature polymorph of sphalerite (1020ﾟC) exist stably at low temperature as 350ﾟC, because of containing Mn, and has a wide area of solid solution in the phase diagram of this system.The Pb-Ag-Bi-S system ; Asa results of hydrothermal experiments of the system at 400ﾟC, the following nine menerals were synthesized. Galena-matildite ss., galenobismutite, lillianite, cannizzarite, heyrovskite, pavonite, benjaminite, bismuthinite, and argentite. Most of minerals have a solid solution by substitution of Ag^+ + Bi^<3+> = Pb^<2+>. Galena-matildite ss. has still complete solid solution between two minerals and lillianite homologous series (Macovicky & Karup-Mphiller, 1970) was synthesized first in this experiments. The phase diagram of the system at 400ﾟC was obtained under hydrothermal conditions.The Fe-Ni-S system ; The system which has been almost completely determined above 500ﾟC, was studied by hydrothermal synthesis at 400ﾟC, and the phase relations of the system were made clear. MSS is still stable as a perfect solid solution between FeS and NiS.

本项目用三年的水热合成方法研究了以下三种硫化物体系的相平衡关系。Fe-Mn-Zn-S系，包括闪锌矿、磁黄铁矿、硫铁矿等常见矿物，多种银硫盐类矿物的Pb-Ag-Bi-S系，以及含镍矿物最多的Fe-Ni-S系。在350 ℃热液条件下测定了该体系的相平衡关系，闪锌矿中同时含有相当数量的Fe和Mn，而铁锰矿含铁不含锌。纤锌矿是闪锌矿的一种高温多晶型（1020 ℃），由于含Mn，在350 ℃低温下稳定存在，在该体系相图中有较宽的固溶区。Pb-Ag-Bi-S体系，阿萨该体系400 ℃水热实验的结果，合成了以下9种化合物。Galena-matildite ss.，方铅矿、方铋矿、钙铋矿、黑铁矾、钾镁矾、苯甲铵铋矿、辉铋矿和辉银矿。大多数矿物以Ag^+ + Bi^<3+> = Pb^<2+>的固溶体形式存在。Galena-matildite ss.在两种矿物之间仍然存在完全固溶体，并且在本实验中首次合成了Lillianite同源系列（Macovicky & Karup-Mphiller，1970）。在水热条件下，得到了该体系在400 ℃时的相图，并对在500 ℃以上几乎完全确定的Fe-Ni-S体系进行了400 ℃水热合成研究，明确了该体系的相关系。MSS在FeS和NiS之间仍然是稳定的理想固溶体。