摘要
在黝方石、蓝方石和青金石等富含 [SO4 ]2 -的方钠石族矿物的有序结构中 ,常见有沿着一个或几个方向的结构调制 ,并还常伴随出现反相畴、双晶畴等畴结构。通过透射电镜研究 ,作者在产于俄罗斯南贝加尔的青金石中 ,观察到了一种由尺度都很小 (长径约在 10 nm以内 )的有序结构畴与无序结构畴相互交生的畴结构新类型。其畴界弯曲而不规则 ,但相邻畴的晶格都是相互连续而完全共格的。这种畴结构是由无序青金石在其有序化过程的初始时产生 。
Lazurite,hauyne and nosean are sulfate rich members of the sodalite group minerals,in the structures of which there are observed one dimensional or multidimensional structural modulations, anti phase domain structures and twin domain structures. Transmission electron microscopic studies on the lazurite from the contact metamorphic zone of pegmatites and dolomitic marbles in South Baikal, Russia, revealed a new type of domain structure intergrown with ordered and disordered domains on a very small scale(≤100nm).Though the domain boundaries are meandering and irregular, the crystal lattices of the neighboring domains are continuous and coherent. This domain structure is an intermediate structure formed during the initial process of ordering, and remains as a metastable state.
出处
《矿物学报》
CAS
CSCD
北大核心
1999年第4期385-389,共5页
Acta Mineralogica Sinica
基金
国家自然科学基金资助项目!(批准号 :4 9572 0 90)
