单斜晶体
It is discovered on the basis of XRD research that the samples calcined at lower temperature than 1100 ℃ belong to a X1 type which is the monoclinic crystal and its space group is P21/ c.
X射线衍射实验发现,在1100℃以下烧结得到X1型物相,属单斜晶系,空间点群为P21/c;
It is appearance of pure white powder monoclinic crystal, slightly soluble in water, low toxicity, rat oral lethal dose greater than 3g/ kg body weight.
外观为粉末状纯白色单斜棱晶体,微溶于水,低毒,大鼠口服的半数致死量大于3克/公斤体重。
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