自形晶

扫描电镜观察发现，重晶石均为完整自形晶，并与同为自形的石英及钠长石共生。

Under scanning electron microscope , barite in these samples occurs as euhedral crystal , co-existing with authigenic quartz and albite with the same idiomorph .

含Au毒砂一般为自形晶、半自形晶，长柱状、板柱状以及菱柱状等。

The Au-bearing arsenopyrite is generally euhedral , subhedral , long-prismatic , plate-prismatic and prismatic , etc.

矿物多为自形晶，中细&中粗粒度。

The minerals appear mostly idiomorphic and have middle-fine to middle-coarse grade .

这些绿帘石呈自形晶，普遍发育熔蚀结构，部分具褐帘石核。

Most of these epidotes are idiomorphic , and they are featured frequently with melting corrosion structure and occasionally with allanite-rich cores .

粒径达1-2mm的赤铁矿斑晶呈板状自形晶浸染于块状矿石中。

Hematite phenocrysts , up to 1 - 2 mm in size , can be seen to occur as euhedral laths disseminated in massive ores .

晶间孔隙主要发育在陡一段下部的粗粉晶含灰云岩中，白云石晶体为自形晶和半自形晶。

The former are mainly developed in the coarsesilt grained , euhedral and semi-euhedral crystalline calcitic dolomites occurring in the lower part of the first member of the Doushantuo Formation .

鲕粒环带的形成，与水体波动能量使铁质围绕碎屑矿物，或围绕先已形成的自形晶微粒铁矿物旋转有关。

The water body energy impelled the ferruginous colloids or suspended matter to rotate around quartz fragments or the preexisting microgranular iron minerals as euhedral crystals to form the ooids ( with nuclei or without nuclei ) .

认为研究区深埋藏白云岩主要由细晶或中晶白云石组成，白云石呈自形或半自形晶。

Deep buried dolostones in study areas mainly consist of fine or medium dolomites , which crystals are euhedral or subhedral .