首页/ 题库 / [问答题]简述硬玉的结晶学特征。的答案

简述硬玉的结晶学特征。

问答题
2021-12-27 03:48
查看答案

正确答案

硬玉属于辉石族、单斜辉石亚族的矿物,属单斜晶系,基本的晶体结构特征是硅氧四面体通过共用1个顶角相连组成单链,硅氧链与链之间由小阳离子M1和较大阳离子M2构成的八面体和多面体组成的链联结。因此,硅氧链间的结合力要小于链内的结合力,而形成解理。硬玉有平行C轴的两组完全解理,两解理面的夹角为87°,接近90°。通常呈短柱状、柱状、纤维状和不规则粒状的形态。


试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

简述硬玉的结晶学特征。
地层划分的依据包括:岩石学特征、生物学特征、地层结构特征、()、地层的接触关系和其他属性。
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
正长石具有以下哪些宝石学特征?()
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
宝石在外力作用下,严格沿这种晶体一定结晶方向裂开成平面的固有性质叫()、沿双晶面裂开成平面的性质叫().
宝石晶体在外力作用后沿一定结晶方向裂成平面的性质,可以是:().
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss,damage or delay has been caused by the improper or negligent stowage of the goods.This means that().
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
简述布尔算符(OR)的作用。
简述结晶聚合物的主要特征及其结晶过程的主要特征
()shall be liable for loss of and damage to the Vessel and/or goods arising or resulting from inaccuracies in stating the description,quantity,weight,measurement or contents.
广告位招租WX:84302438

免费的网站请分享给朋友吧