Importance of amorphous silicates as source material of the solid planets and its initial evolution

在实验研究的基础上，我们提出了一个固体颗粒从宇宙到太阳系的演化模型，其中观察到的硅酸盐矿物是由无定形硅酸盐结晶而成的。“星尘”号和“隼鸟”号的样品分析表明，彗星的物质是混合了高温物质的无定形硅酸盐，而s型小行星的物质是普通球粒陨石，受到热变质作用。非晶态硅酸盐具有较高的反应活性和成分多样性，在热液变质过程中引起了迅速的反应。这些结果表明，太阳系的源物质与非晶态硅酸盐一致。

Based on experimental study, we have proposed a model of solid particle evolution from the universe to the solar system, where silicate minerals observed were crystallized from amorphous silicates. Stardust and Hayabusa sample analysis shows that cometary material is amorphous silicate mixed with high-temperature materials and S-type asteroid material is ordinary chondrite suffered by thermal metamorphism. Amorphous silicates with high reactivity and compositional valiety caused prompt reaction during hydrothermal metamorphism. These results showed that source material of the solar system is consistent with amorphous silicates.