树枝状晶体主要是由铁的氧化物——磁铁矿组成。
The branch shape crystallite is mainly composed of iron oxides, i. e. magnetite.
样品断面超薄片在显微镜下观察发现树枝状晶体不透光，反射色亮白。
By the observation of polarizing microscope, it is found that the thin section of branch shape crystallite is not transparent and its reflecting color is white.
用超声分散法制备了球形与树枝状铋纳米晶体；
Spherical and dendritic Bi nanocrystals were prepared by ultrasonic dispersion method.
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