层间阳离子对蒙脱石性质的影响

制备了层间阳离子为一价(Li^+,Na^+,K^+,Rb^+,Cs^+),二价(Mg^(2+),Ca^(2+),Sr^(2+),Ba^(2+))和三价(Y^(3+),La^(3+),Nd^(3+),Eu^(3+))离子的蒙脱石,研究了不同层间阳离子对蒙脱石性质的影响。蒙脱石的吸附水和层间水的脱去随层间阳离子种类的不同而表现为单一或两阶段脱水过程。层间阳离子的电价对蒙脱石电导率的影响远大于离子半径的影响。

矿物离子导体——皂石

对天然皂石进行了电性测试,发现皂石有很高的离子导电性,其室温电导率可达2.5×10^(-3)S·cm^(-1)。

Bi_6Te_2Mo_2O_(21)新晶体的生长及其物理性质

Bi_6 Te_2 Mo_ O_(21)是仿天然赤路矿成分,在 Bi_2 O_3-TeO_3-MoO_3三元系相图中进行人工合成的新晶体。晶体尺寸为700×300×300μm^3,经物理性质和晶体结构测定初步表明,该晶体在反光、声光特性方面有应用前景。

新矿物——赤路矿的发现和研究

赤路矿(chiluite),是一种含铋、碲、钼、氧的新矿物,化学分子式是Bi_6Te_2Mo_2O_(21)。 赤路矿产在辉铋矿石英脉中,与硫碲铋矿、辉钼矿、钼铋矿共生,常呈羽毛状或不规则粒状,有时可见六边形晶体,粒度一般<30μm,反光显微镜下呈灰色,弱非均质,反射率560nm,R′g 18.10％,R′p 17.15％,透射光下褐色,一轴晶负光性,折光率ω=2.4,ε=2.3,硬度3.2,比重3.65。X射线粉晶分析,赤路矿属六方晶系,主要线条:d_(meas)A(I)(hkl)是3.300(10)(004),3.050(9)(104),2.510(5)(105),2.060(5)(312),1.655(5)(008)。电子探针分析结果,Bi61.66,Te11.19,Mo10.29,O16.06。 在400-900℃条件下合成了赤路矿的同质多象晶体,并进行了红外光谱,差热分析及电子能谱测定元素价态等研究工作。

Bi_6Te_2Mo_2O_(21)——A New Artificial Crystal and Its Growth Method and Physical Properties

E.M.Levin,R,Kohlmuller et al.^[1]have reported the phase diagrams of the Bi2O3-TeO2 and Bi2O3-MoO3 binary oxide systems.This paper is intended to describe a new phase named chilunited-Bi6Te2Mo2O21 in the Chilu molybdenium ore deposit at Anxian County,Fujian Province.Because of small-sized mineral grans(-10μm),it is difficult to determine the crystal structure and physical properties of the mineral.According to its composition,we have successfully synthesized this new mineral using the fusion method.The synthesized single crystal,up to 700×300×300μm^3(0.063mm^3)in size,has been studied in great detail on its compositional and structural characteristics as well as physical properties.

罗甸石英猫眼的矿物学特征

The Luodian quartz chatoyant could occur in quartz veins of blue asbestos. It is brown green, light green and bluish green in color. Hardness ( H m) is for 6.8～7 2, density is 2.68 g/cm 3,refraction index N e=1.553, N o=1.544,birefractio N e N o=0.009,and UV fluorescence is of no optical property. The microstructure of quartz chatoyant is parallel fibrous with inclusions of tremolite. Under sunshine and tungsten light, an accumulative and dazzing slit of light is reflected from the inner part of a piece of Luodin chatoyant gemstone.

云南祖母绿宝石的矿物特性

云南祖母绿宝石的矿物特性邓梦祥（中国科学院地球化学所，贵阳５５０００２）关键词祖母绿宝石矿物特性近年云南省发现祖母绿矿床。矿区成矿条件为前寒武系区域深变质的片麻岩、云母岩和花岗片麻岩。矿体呈脉状和囊状赋存于花岗伟晶岩中的层间裂隙。祖母绿晶体完好，储量...

晶洞奇观

贵州省晴隆锑矿，近几年在坑道掘进中，连续发现了几十巨大的后生晶洞。一种叫“矿花洞”；一种是石膏晶洞。洞中方解石或石膏晶簇琳瑯满目，异采多姿，奇“花”异石，装饰其间。构成一幅幅壮丽的大自然最观。